The Senior Executive Service (SES) was established by the Civil Service Reform Act of 1978 (CSRA; P.L. 95-454, 92 Stat. 1111). Congress created the SES to provide a government-wide, mobile corps of managers within federal agencies. The SES, comprising mostly career appointees who are chosen through a merit staffing process, is the link between the politically appointed heads of agencies and the career civil servants within those agencies.