Is this the Keystone?
The Senior Executive Service (SES) lead America’s workforce. As the keystone of the Civil Service Reform Act of 1978, the SES was established to “…ensure that the executive management of the Government of the United States is responsive to the needs, policies, and goals of the Nation and otherwise is of the highest quality.” These leaders possess well-honed executive skills and share a broad perspective on government and a public service commitment that is grounded in the Constitution.
https:// www.opm.gov/policy-data-oversight/senior-executive-service/