This study aims to reveal the effect of employee development on work behavior and work motivation and its impact on employee performance. This research uses surveys and verification methods. The sample used is 240 units. Data analysis using the Structural Equation Model. The results showed that: employee development influences employee performance, work behavior, and work motivation; Work Behavior affects employee performance; Work motivation affects employee performance; Employee Development influences employee performance through work behavior and works motivation; Work motivation affects employee performance through work behavior. The Study recommend that the need for employee development planning by synchronizing and synergizing the policies of the Regional Government, the Provincial Government and the Central Government which are supported by budget allocations, and compilation of education and training guidelines, job competency standards, career patterns, study permits/assignments, strengthening the employee supervision team, and the development of a comprehensive Staffing Application System