The Impacts of Organizational Culture and Transformational Leadership Style on The Employee’s Job Performance: A Case Study at UAE’s Petrochemical Company

Organizational culture is a system of shared meaning held by members which distinguishes the organization from other organizations. Every organization is defined and characterized by its own culture and can barely be separated from its culture. Thus, the focus of this paper is on organizational culture transformational leadership style and job performance. Hence, to derive meaningful coverage, this study examines Abu Dhabi National Oil Company (ADNOC). This oil and gas sector plays an important role in the national economic development of the United Arab Emirates (UAE). In this quantitative research study, a structured questionnaire using a 5-point Likert scale was used as the instrument for data collection with a total of 450 respondents from Abu Dhabi National Oil Company participating in the study. The validity and reliability of the measurement and the structural models were ascertained. The Partial Least Squares Structural Equation Modeling (PLS-SEM) was used to test the hypotheses. Findings revealed that organizational culture and transformational leadership have significant relationship with employees' job performance. The findings add to the extant literature by integrating the factors that could improve job performance. Likewise, the implication for the practices and future research were also discussed.


Introduction
In today's society, the flow of life depends on effective leadership in several aspects such as; organizations development, survival of community, work function and effective performance. Organizations have been established to address social needs and group activities. Moreover, the current global economy is constantly driven by innovation, performance and profitability. NawoseIng 'ollan, & Roussel, (2017) note that due to globalization, companies are changing their structure in order to compete in the bigger global arena. Thus, organizations have to put more efforts in terms of providing job satisfaction.
With numerous job opportunities currently available, candidates are difficult to please. They are looking not only for an attractive wages, but talents are choosing organizations that can provide them various kinds of benefits, the potential career advancement, and an environment in which they feel comfortable to learn and thrive. If an organization failed to fulfill these requirements, job seekers may find another company that does. Thus, it is important for organizations to understand exactly what they can offer to potential employees, then highlight their best features when recruiting candidates.
In general, leadership style is the behaviour pattern of a person who attempts to influence others (Northouse, 2012). The central concept here is change and the role of leadership in envisioning and implementing the transformation of organizational performance. Likewise, transformational leadership is simply the practice of leadership behaviour which empowers followers to create a vision, promote change, and achieve a meaningful and satisfying work environment (Bass, 1985). Transformational leadership attributes include four transformational elements which include Idealized influence, Inspirational motivation, Individualized consideration and Intellectual stimulation (Avolio, 1991) Gopal and Chowdhury, 2014). Similarly, Simmons et al. (2017) explains that a leader is an individual or group of people who decides on, equips, trains, and influences one or more followers who have diverse attributes, competencies, and talents and focuses on developing such followers for organizational tasks and objectives. He also inspiresthe followers to willingly and enthusiastically expend emotions physical and mental energy in a concentrated and coordinated effort to attain the organizational goals and targets. Finally, leadership is defined as the process of influencing the activities of an organization in the form of goal attainment (Kişi, 2019). It is also the manner of facilitating employees and their collective efforts to perform shared objectives; and the manner by which they are influenced to agree on what needs to be carried out and the way they are to be carried out (Yukl, 2010;Northouse, 2007;Janićijević, 2008).
According to Denison, Hooijberg, Lane, & Lief, (1996) organizational culture is defined as the underlying values, beliefs, and principles that serve as a foundation for an organization's management system, as well as the set of management practices and behaviours that both exemplify and reinforce those basic principles. Denison (1996) conceptualizes organizational culture as composed of four major dimensions, including: involvement, consistency, adaptability and mission. It is, thus, evident that organizational culture contributes to organizational effectiveness andreflects the strategy, leadership and practices of an organization; it is the means by which members of an organization express themselves, and it is the glue that binds a distinct group of individuals together all in an effort of achieving a common vision and goal. The organizational culture has been depicted as being responsible for being associated with employee job performances, since the culture of an organization is evidently: the translation of organizational vision, strategy, leadership and systems into organizational practices that either lead to success or failure within the organization  (Denison, Nieminen and Kotrba, 2014). Furthermore, Tlaiss & Elamin (2015) determined the relationship between organizational culture and overall job performance in a manufacturing firm in Kuching, Sarawak (Malaysia). Using a convenient sampling of one hundred thirty-five respondents and face-to-face interview, data were collected and analyzed using the Statistical Package for Social science (SPSS). Findings from the study revealed that there was a significant relationship between cultural norms, cultural values, culture and compensation structures, and the overall performance of the employees are arguably the most important asset within an organization as they play pivotal roles in achieving organizational goals and target, consequently, creating value for the future.
Transformational leadership has become a crucial leadership style for modern organizations given the impact such leadership has on organizational related outcome and variables. Devanna (1990) states that transformational leaders are agents of change who are able to create innovative and flexible work environments that inspire employees to achieve results beyond their intended capacity. Given the volatile nature of gas industry in terms of fluctuating prices of oil, as well as, the rigors of managing a diverse human resource capital and facilities found in oil and gas companies, it becomes crucial that leaders with the right leadership behaviour and qualities mange the affairs of oil and gas operations within organizations. The literature has revealed that leaders who are able to respond to changes and initiate change that outweighs expected outcomes are those who possess transformational leadership qualities (Ahamad & Kasim, 2016;Barling, Slater, & Kevin Kelloway, 2000;Biswas, 2009;Chang et al., 2017;Esmi, Piran, & Hayat, 2017;Musa et al., 2018;Wang et al., 2005). Hence, transformational leadership becomes increasingly important for the leadership of oil and gas companies.
The Abu Dhabi National Oil company is UAEs foremost and largest oil and gas company and is the most contributor to economic development in the UAE among all public organizations.
In the Sustainability Performance report (2015) of the Abu Dhabi National Oil Company, it was revealed that over 65,000 employees were employed in the organization, with a significant proportion of those employees, Emiratis. Similarly, the report revealed that ADNOC patronizes over 165000 local contractors, and a total of AED 309 million on the training of employees to develop the core values of the organization and contribute significantly to the economic development of the UAE (Taing and Way, 2015). This further reiterates ADNOC's crucial role in the sustenance of the UAE economy. However, it was reported that ADNOC spends significantly on training and development of its employees in order to scale up employee performance, consequently leading to developing the overall organizational performance. While the training and development of employees are crucial, it can, however, be directed towards developing the core leadership skills and attributes in employees that build on employee performance, while nurturing an organizational culture with which performance thrives. Sadly, no study in the UAE has explored or examined the effect of organizational culture and transformational leadership style on the employee's job performance, especially from an oil and gas context (Alzahmi, 2016;Hijazi, 2017;Saad & Abbas, 2018).
Hence, since ADNOC is required to deliver a set of targets and objectives, to do so, effective leadership and administration would be required across all of the company's operations, as well as the contributions of employees to achieve the desired performance the company seeks from all of its members. There is an evidence suggesting that transformational leadership influences the job performance of employees (Ahamad & Kasim, 2016;Antonakis & House, 2002;Biswas, 2009;Chang et al., 2017;Devanna, 1990;Eisenbach, Watson, & Pillai, 2009;Elrehail et al., 2018 -Tineh, 2012;Musa et al., 2018). However, it is not known from the gulf countires perspective, especially, in the oil and gas context. Hence, this study examined the influence of organizational culture and transformational leadership style on the employees job performances of Abu Dhabi National Oil Company employees.

Organizational culture
The term culture has become an important part of all human societies. With the emergence of globalization, culture has taken on a broader meaning and has evolved into an indispensable dimension for organizations (Browaeys & Price, 2008). Culture, in its simplest form, is described as the way of life of a group of people (Foster, 1962). Hofstede (2011) defines culture "as the collective programming of the mind that distinguishes members of a group or category from others". Organizational culture, on the other hand, may be defined as the collective programming of the minds of organizational members to hold certain beliefs, norms and values. In the words of Schein (2010); Warrick (2017); Zhou (2017) and Mohamed (2016), organizational culture is described as comprising an underlying set of norms, values, and assumptions that members of an organization hold that depicts the organizations visions, missions and beliefs. Hence, the organizational culture of the company would align this value and belief with the reward system and processes. Employees who are fairly treated reciprocate by performing well in the jobs given to them. Likewise, empirical evidence suggests that organizational culture is indeed a construct of analysis in several studies (Dastmalchian et al., 2000;Berrio, 2003;Yang, 2010;Keir and Youssif, 2016;Halim, Alremawi, & Tambi, 2018) For example, Abdullah et al (2014) reported the significant role of organizational culture as a compass for guiding the behaviour of employees. Halim et al. (2018) examined the role of organizational culture in the relationship between leadership style, organizational commitment, quality management practices and organizational performance. Findings from the study revealed that organizational culture mediated the relationship between organizational factors and organizational performance. Al-Ali et al (2017) also examined the influence of change leadership on organizational culture and change management practices in the public-sector firms in the UAE. The study also reports the role of organizational culture (hierarchical culture) on the interactions between leadership and change management programmes. Furthermore, findings from the study revealed that hierarchical culture was positively and significantly impacting both planned and emergent change management in UAE public sector service organizations.
Additionally, Esmi, Piran, and Hayat (2017)  such as leadership and performance in non-western context in order to provide empirical evidence of the role of organizational culture and transformational leadership style in non-western context (Wang et al., 2005;Halim et al., 2018;Saad and Abbas, 2018).

Leadership
Leadership is related to change. Northouse (2010; defines leadership as a procedure wherein an individual impacts a group of people to achieve the same goal. Similarly, Bennett et al., 2017 andBatmanghlich, (2015) describe leadership as the influential relationship between leaders and follower inspiring significant changes that replicate their interactive functions. Leaders themselves tend to be under a lot of pressure, while they may be new to the problem that they face, they intend to generate significant changes in an effort to prove their worth and impact on the organization. Western, (2008) additionally explains that leadership management is a technique whereby a leader focuses on understanding and relating with subordinates or followers while assisting them in outlining their values and dreams, thereby motivating them to achieve organizational goals (Storey et al., 2016).
Since the early 20th century, scientific research on leadership emerged. A large number of studies demonstrated that leadership had gained significant importance, from education and business to social organizations (Al-Husseini, 2014). Scholars have found that leadership behaviours are essential factors that lead to the success of organizations (Bass, 1990;Al-husseini, 2014). Nowadays, organizations need to have people with high ability in leadership that can contribute to the success of the occupation (Northouse, 2007). Likewise, Al-Husseini (2014) stated that a good leader has the ability to transform the organization according to the market demands, as this is a solution to most of the organizational issues today. In addition, effective leaders have the functionality and capability to steer organizations to fulfilment by attempting and paying attention to the envisioned long-term commercial enterprise or environmental exchange (Avolio, Waldman, and Yammarino, (1991). Northouse (2007) pointed out that for an organization to build an efficient team, it is necessary to have an effective leadership as it is by far one of the crucial elements in enhancing the performance of the organization. Those who have the potential to affect individuals are known as leaders, and those whom the characteristic of management is applied to are referred to as the supporters. Leaders and followers are linked to the process of leadership (Northouse, 2007). Hence, Nawaz, & Khan (2015) saw leadership as the influence that occurs between leaders and his/her subordinates, which consequently produces excellent results. These definitions and discussions on leadership help to conceptualize exactly what the term leadership means, as well as how it can be approached within organizational settings. In conclusion, these definitions of leadership evidently reveal that leadership entails some form of exchange, it is between two groups of people (usually leaders and followers), working together towards a common goal. The entire leadership process is also characterized by specific abilities and qualities of leaders in inspiring and motivating followers to achieve organizational goals. Nawaz, & Khan (2015) stated that the primary theories of leadership are transactional and transformational leadership theory, contingency theory, leader-member exchange (LMX) concept, traits theory, behavioural theory and decision concept of management. Some of these theories will be explored in the following section.

Transformational Leadership Style
The concept of transformational leadership is based on charismatic leadership studies. The idea was developed from leadership research subjects (Tafvelin, 2013). Burns (1978) first related the idea of transformational leadership, which he described as "transforming leadership" at the time and subsequently was expounded by Bass (1996). According to Burns (1978), transforming leadership is a term that describes how leaders and followers help each other to reach an optimal level of morale and motivation, thus enabling organizational success. In trying to differentiate leadership and management practices, Burns (1978) also opined that some difficulty exists in separating the two concepts, but the later and the former can be distinguished with regards to their characteristics and behaviour, hence in such attempt, he established the concept of transforming and transactional leadership. Furthermore, Burns (1978) stated that the transforming approach to leadership focuses on two essential elements-people and the organization. It enables an avenue for organizational change and value by creating a sense of change in perception, expectations and aspirations of employees and by enabling leaders to better align employee's abilities and interest for the attainment of organizational goals. Transforming leadership is a leadership concept that is characterized by causing overall changes in organizational culture, through leadership by example, as well as a morale motivator and role model-that is the leader. In reaching a more conclusive description of the concept, transformational leadership is one in which leaders ensure ways of motivating followers (employees) to do more than they are possiblely expected to do, this is what the leader does according to Avolio, Bass, and Jung (1999) by increasing the sense of importance and value perception of tasks, stimulating employees to surpass their level of interest and direct such interest towards the goals of the organization, thereby raising the level of change also. This leadership theory focuses on motivating employees to overcome their very own distractions and strive for the collective goals of the organization. Transformational leaders have the capacity to influence followers in such a way that they are able to adopt imaginative and discerning attributes for the benefit of the organization as though such attributes were always present in them (Jiang, et al., 2017). Hence, such leaders generally tend to help their followers to perform beyond expectations with the intention of making their vision come true (Bass, 1999;Avolio and Bass, 2004). In addition, this motivates employees to relinquish personal interests and strive for the attainment of collective organizational goals (Beck-Tauber, Choy Chong, and Wüstenhagen, 2012). Within the concept of transformational leadership, Bass (1996) argued that leaders must adopt the positive forms of transactional leadership (such as contingent reward and active management by exception) as well as transformational leadership. He explained that an integration of the two leadership styles would lead to optimal success in the organization. Conversely, Burns (1978) argued that leaders must strive for a transformational leadership style. Similarly, transformational leadership accounts for unique variance in performance ratings (or other consequences) (Bass, 2000;Tafvelin, 2013).

Job Performance
The word "performance" is used extensively in all fields of management research. Golden (2016) argues that organizations are judged mostly by their performance. Thus, the achievement of any business organization is continuously dependent on the contribution from employee's job performance. The performance of the employees is highly responsible for realizing the vision and mission of the business organization. Therefore, it is essential for leaders and employees to understand the concept behind job performance. On the other hand, job performance implies the measurable ____________________________________________________________________________ ______________ Aishah AL DHANHANI and Nor Hazana ABDULLAH (2020), Journal of Human Resources Management Research, DOI: 10.5171/2020.379522 outcomes of employees regarding their effort which is associated with the business organizations' goals and objectives which are accomplished by the employees when they work effectively and efficiently. In addition, job performance is an indication of the capacity of an organization to efficiently accomplish independent objectives . Some of the components that are considered measurable are employees' performance, which is measured by their level of production. Numerous studies have established various ways of assessing job performance (Saad and Abbas, 2018). This includes determining the quality, quantity, knowledge and/or creativity of individuals as against the accomplished task which has been defined and specified in the employee's job description to be carried out over a specified time (Mawoli et al., 2012). Weerarathna and Geeganage (2014) carried out a study to investigate the association between organizational culture and job performance using a self-administered survey. Findings from the study revealed a significant positive correlation between organizational culture and job performance. Furthermore, Saad and Abbas (2018) examined the direct and indirect effect of organizational culture on the overall job performance of employees in the public sector in Saudi Arabia. The authors also examined the effect of each dimension of organizational culture on employees' job performance. Hence, the findings indicate a significant and positive relationship between organizational culture and employees' job performance. Likewise, four dimensions of organizational culture (i.e. managing change, achieving goals, coordinating teamwork and cultural strength) were significantly and positively correlated with job performance, with the exception of one organizational culture dimension (i.e. customer orientation) which was negatively associated with Job performance. The implication of the findings revealed that some organizational culture practices had a positive effect on performance while some also negatively influence job performance (Mawoli et al., 2012). As shown from a review of some of the studies in the extant literature, the association between organizational culture and job performance is evident. However, most of these studies were carried out in the western context. Furthermore, most of the empirical findings on the associations between organizational culture and job performance has been based on studies in private business companies and public companies (Hofstede, 2011;Saad and Abbas, 2018). Little research has been conducted in oil and gas companies on organizational culture and job performance, thus necessitating the need for this study. Figure 1 shows the research framework of the study. After an extensive review of the literature. The researcher proposes the framework to guide the inquiry; the research framework provides an illustration of the map of the study by showing the variables being studied as well as the nature of the investigation. The dependent variable of the study is the job performance of middle managers in ADNOC, the independent variable of the study is transformational leadership style and the organizational culture.

Research Framework
H1: There is a significant positive relationship between Organizational Culture and Job performance. H2: There is a significant positive relationship between transformational leadership and job performance.

Methodology
This section focuses on the methodology adopted in this research study to find answers to the questions raised in the study. Thus, this study adopted the quantitative research approach; and therefore, the key instrument that was employed in the collection of data was a survey questionnaire. Likewise, this section includes an explanation of how the study was conducted and the selection of the respondents as well as the design of the questionnaire.
A convenience sampling technique was used to identify the sample for the study. The sample of 450 employees of middle managers of the oil and gas company middle managers participate as the respondents of the study. Three measurements were adopted; the transformational leadership (MLQ), Denison's Organizational Culture Survey and job performance; all items used 5-Likert scales. The responses were coded as 1= Strongly Agree, 2= agree, 3= moderate, 4= disagree and 5= Strongly Disagree. The questionnaires were administered namelessly. Before distribution of the real data collection, pilot test was conducted and the reliability of the dimensions was determined. A Cronbach alpha value of above 0.7 represents acceptable level of internal consistencies. Therefore, all the constructs of the study were found to be reliable with Alpha Cronbach values ranging from 0.909 to 0.864. Upon completion of real data collection, Bootstrapping test was used to calculate the relationship between organizational culture and transformational leadership style on employees' job performance.

Results
The purpose of this exploratory sequential study is to examine the relationship between the organizational culture and the transformational leadership style on job performance in Abu Dhabi using ADNOC as case study. This section presents the findings obtained from the questionnaire deployed for the purpose of the research with a view to answering the research questions posed for the study.

Discriminant Validity
Discriminant validity is the degree to which scores on a given test do not correlate with scores from other tests that are not calculated to measure the same constructs. It is therefore assessed by analyzing constructs connections in any given model. Likewise, discriminant validity is said to be valid when each correlation is less than 1.0 by an amount greater than twice its respective  (Byrne, 2013;Hair, 2011). According to Fornell and Larcker (1981) and (Awang, 2015), discriminant validity is succeeded when the square root of a construct's Average Variance Extracted exceeds its correlation with other constructs. Table 1 is, therefore, intended to show the discriminate validity index of all the three constructs of the study. The above Table 1 shows that the diagonal values in bold are the square roots of the Average Variance Extracted (AVE) of the latent constructs of the research. Thus, discriminant validity has been achieved among all the research constructs. As mentioned earlier this happens when the square root of a construct's AVE exceeds its relationship values with other constructs in the study (Awang, 2015).
Heterotrait-Monotrait (HTMT) analysis was used to support the proposal of Fornell and Larcker (1981). The HTMT analysis provides that discriminate validity is achieved when the inter-correlations between a constructs of interest with all other constructs is less than 0.85 (Kline, 2015). Therefore, it is confirmed that the discriminant validity in this study is succeeded, as presented in Table  2.  Table 2 presented that all the values in the matrix are less than the 0.85 threshold for inter-constructs relationship, therefore the achievement of discriminate validity is confirmed as earlier explained the conditions. Thus, it can be safely concluded that the reliability and validity tests conducted on the measurement model are satisfactory. The analyses have confirmed that the measurement model for the study is valid, and is thus fit to be used to estimate the parameters of the structural model.

Reflective Reliability Analysis
The reliability of the study as shown in   Table 3. In addition, all the constructs' indicators were above 0.7. The item-total correlation is the correlation of the item with the total of other items in the scale (Aimran et al., 2015). SmartPLS is applied because the structural model is an important instrument for measuring the significance level of the path coefficients between the constructs. The analysis of the path coefficients is shown in Figure 2. The results have shown that there was significant positive relationship between transformational leadership style and organizational culture on employee's job performance.

Path Coefficient
According to (Hair, et al., (2014), the level or strength of a relationship is measured by the magnitude and significance of the estimates. Path coefficients that are close to +1 represent strong positive relationships while those that tend towards -1 represent strong negative relationships (Hair et al., 2014). The significance of the path estimates was determined using the bootstrapping method in Smart PLS-SEM.

Discussion
The aim of the study is to scrutinize the effect of the organizational culture and transformational leadership style on employees job perforamance using ADNOC as the case study. Thus, the first research objective sought to determine the effects of organizational culture on job performance. Hypothesis (H1) was hence used to test the effect of organizational culture on job performance. Findings from the analysis revealed that there is a significant positive relationship between organizational culture and employee performance; hence, the hypothesis H1 was supported. This implies that the beliefs, assumptions, as well as values that define an organization also influence and impact organizational outcomes and performances. This finding is consistent with some studies reported in the literature. For instance, Weerarathna and Geeganage (2014) investigate the association between organizational culture and job performance using a self-administered survey. Findings from the study revealed a significant positive correlation between organizational culture and job performance. Similarly, Saad and Abbas (2018) examined the direct and indirect effect of organizational culture on the overall job performance of employees in the public sector in Saudi Arabia. The authors also examined the effect of each dimension of organizational culture on employees' job performance. Findings show a significant and positive relationship between organizational culture and employees' job performance. Hence, in this study, it is concluded that organizational culture has a significant and positive effect on the job performance of employees.
This result further supports the claim that leadership significantly affects organizational culture. Hence, the relationship between leadership style and organizational culture creates a strong determinant of job performance. This finding is consistent with ____________________________________________________________________________ ______________ Aishah AL DHANHANI and Nor Hazana ABDULLAH (2020), Journal of Human Resources Management Research, DOI: 10.5171/2020.379522 that of Alomiri (2016) who found that National Culture mediates the relationship between leadership style and organizational culture, and it positively affects e-services implementation. Besides, Ahmadi, Rezaei, and Gorizan (2015) in his study, revealed that transformational leadership has a direct, positive and significant impact on organizational culture. This study further supports previous findings from Salanova  (2018) which revealed that transformational leadership style has an impact on organizational culture. Findings from this study also corroborate those of James-Parks (2015) which showed that transformational leadership has a significant positive influence on organizational culture.
The second research objective sought to determine the effect of transformational leadership style on job performance. Hypothesis (H1) was therefore used to test the effect of transformational leadership style on job performance. Results from the analysis support the hypothesis that there is a significant positive relationship between transformational leadership and job performance. This implies that leadership plays a crucial role in the job performances of employees. This finding is corroborated by Golden (2016) in their study, which investigated the relationship between transformational leadership and the positive forms of transactional leadership on the job performances of TVE administrators in Nigeria.
Findings revealed that transformational leadership and transactional leadership (i.e. contingent rewards and active management by exception) were positively and significantly correlated with employee job performance. Similarly, this finding is consistent with those of Jiang et al (2017) which investigated the effects of transformational leadership on sustainable job performance and found that transformational leadership positively affects sustainable job performance.

Recommendations for Future Research
Given the outcomes of this study, the following recommendation for future studies can be explored. Future studies can include more variables such as transactuional leadership, laissez-faire and other contextual variables to study the effects on job perfoamnce in different sactors. In addition, the present stusy has not used either mediation or moderation variables to see the indirect effect on job perfoamcne. Thus, it would be interestnting for future reschers to test the inrirect influence.

Implications
Findings from this study were established using a quantitative research approach, which uses numerical data to make an inference from a sample to a population. While quantitative approaches are in themselves important research methodologies, they are limited in terms of providing deeper insights and understanding regarding the variables studied. Therefore, future studies can use mixed-methodology approaches in weighing the perceptions, ideas, and views of the respondents.

Conclusion
The aim of the study was to analyze the relationship between organizational culture and transformational leadership style on job performance of the employees at Abu Dhabi Oil National Company. The applied measures of this study have exposed a remarkable level of reliability. two hypotheses were developed, all hypotheses were fully supported. Generally, based on the findings of the study, the transformational leadership behavior and organizational culture have a significant relationship on employees' job performance. In addition, this finding, thus, contributes to the existing literature on the effects of transformational leadership and organizational culture on the job performance of employee, especially in an Oil and Gas context. Therefore, if ADNOC must realize optimal performances from its ____________________________________________________________________________ ______________ Aishah AL DHANHANI and Nor Hazana ABDULLAH (2020), Journal of Human Resources Management Research, DOI: 10.5171/2020.379522 employees, then transformational leadership must be a primary leadership style embraced by the organization.