THE EFFECT OF ADAPTIVE ABILITY, COMMUNICATION SKILLS, AND WORK ENVIRONMENT ON PERFORMANCE OF MEDAN MAYOR'S OFFICE WITH TEAMWORK AS INTERVENING VARIABLES

. Having a reasonable effort of adapting to the change will improve the organization's performance. Good communication with the leaders, colleagues, and employees will ease communicating the organization's problems for achieving the best organizational performance. A good work environment will influence more the employee's motivation to work to improve the employee's performance. Conducting the working programs, the government will establish teamwork to fasten the organization's performance achievement. This research aims to analyze the influence of adaptability, communication skills, and working environment on employee performance at Medan Mayor's Office with teamwork as the intervening variable. Sample selection in the population using simple random sampling method. This research population is government employees at Medan mayor's office with a total of 555 employees, with the amount of the sample being 232 employees. The analysis uses statistics and path analysis. The result shows the adapting ability, communication skills, and working environment directly significantly influence teamwork, and then the adaptability, communication skill, and work environment positively and significantly affect employee performance. Indirectly, collaboration is positively and significantly able to mediate the relationship between adaptability, communication skill, work environment, and employee performance. Therefore, teamwork is significantly able to be the intervening variable in this research.


INTRODUCTION
Every organization, both for-profit and non-profit, both private companies and government agencies, must pay close attention to the performance of each member of the organization. This relates to the goals of the organization. (Robbins, 2014) defines performance as a result achieved by employees according to specific criteria that apply to a job. From some of the experts' definitions, it can conclude that the performance of an employee or employee is an assessment of the work carried out by an employee or employee following their duties and responsibilities and within a certain period following the procedures determined by the organization: profit nor the non-profit.
The performance of each individual in the organization has an impact on organizational performance. The better the performance of everyone in the organization, the better the organization's performance will be.
In the 4.0 era, every individual is required to keep up with the times. This has an impact on the progress of organizations that can keep up with change. The ability to adapt to change is the most demanded thing for every human resource to continue developing their potential and creating their potential. (Sutrisno, 2013), in his research, states adaptation is the ability to live things to adapt to their environment.
According to (Risman Muhammad, 2013 According to (Suprianto, 2016) performance is the result an organization obtains, whether the organization is profitoriented and non-profit oriented generated produced during a specific period. The dimensions of performance in this study are Quality, Quantity, Task Implementation, & Work Attitude.
According to (Rohadi & Haryono, 2016) that Adaptation is the ability to live things to adapt to their environment.
Adaptability is a very complex behavior because it involves several functions and intellectuals. For example, reasoning, working memory and learning higher skills (Susilo, 2016 The sampling method uses the Slovin formula with a margin of error set at 5% to obtain a sample of 232 employees.

RESULTS AND DISCUSSION
The results of the regression of substructure can be seen in Table 1 below: Interpretation From the results of the path analysis of sub structure I can be seen in the following figure: The results from sub-structure II regression can be seen in Table 4.15 below: The interpretation of the results of the path analysis of the sub-structure II can be seen in the following figure

Teamwork
The work environment according to (Afandi, 2018)  This can affect the continuity of his work and career, so that the implications for work results are less than optimal.

Employee Performance
According to (Mangkunegara, 2011) (Phutela, 2015). If someone has quality communication skills, it is very supportive to achieve company targets.

Employee Performance
The work environment is everything that is around employees at work, whether in the form of physical or non-physical, directly or indirectly, which can affect employees and their work while working.
The work environment also includes interactions or relationships between employees and organizational leaders. The condition of the work environment is said to be good or appropriate if humans can carry out activities optimally, healthy, safe, and comfortable. An employee working in a comfortable work environment will be able to make the employee work optimally and produce good performance, on the contrary, if an employee works in an inadequate and not supportive work environment to work optimally will make employees lazy, tired quickly so that performance employee will below. A good work environment is a supporting factor which is also considered very supportive in improving performance (Syahreza et al., 2017). The work environment is a state and condition that provides a sense of security and comfort at work, which is supported by The Influence of Teamwork on Employee

Performance
According to (Hatta & Musnadi, 2017) cooperation is the synergy of the strengths of several people in achieving a desired goal. Cooperation will unite the power of ideas that lead to success.
Stated by (Devina, 2018) that teamwork is a collection of individuals who depend on each other on tasks and are jointly responsible for the results obtained.
According to (Sarlito, 2013) teamwork is people who work together to solve problems and achieve goals in a group.
Cooperation is a form of group consisting of more than someone who performs tasks with a number of rules and procedures to develop effectiveness and reciprocal relationships to achieve team goals.
Cooperation can also stimulate someone to contribute to the group, as according to (Mawarti, 2016) teamwork is a group whose  (Harahap, 2020), performance is the result obtained by an organization, whether the organization is profit-oriented and non-profit oriented generated during a certain period.
According to (Mangkunegara, 2011) performance is an assessment that is qualitative in nature and quantity which gives results or tasks and responsibilities are carried out correctly. (Sutrisno, 2013) states that performance is the result of a certain work process in a planned manner at the time and place where employees carry out activities in the organization where they work.

The Influence of Work Environment on
Employee Performance through

Teamwork.
The work environment can be in the form of rooms, layouts, facilities and infrastructure as well as working relationships with fellow co-workers.
According to (Sunarsi, 2020), the work environment is everything that is around the workers and that can affect him in carrying out the tasks assigned. According Siti Novia Rachmawati, Prihatin Lumbanraja, Elisabet Siahaan

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to (Vanesa et al., 2019), the work environment is the overall tools and materials encountered, the surrounding environment where employees work, work methods and work arrangements both as individuals and as groups.
According to (Suharti & Mudayana, 2020) performance is the result obtained by an organization, whether the organization is profit-oriented and non-profit oriented generated during a certain period.
According to (Suharti & Mudayana, 2020) performance is an assessment that is qualitative in nature and quantity which gives results or tasks and responsibilities are carried out correctly. (Sutrisno, 2013) states that performance is the result of a certain work process in a planned manner at the time and place where employees carry out activities in the organization where they work.
Definition by (Robbins, 2014) that performance as a result achieved by employees in their work according to certain criteria that apply to a job. The term performance comes from the word job performance job performance or actual performance actual (achievement achieved by someone). According to (Mangkunegara, 2011)