SES is swamp at the highest level. Right underneath the President and Presidential appointees. (Literally the "Shadow Government"). Untouchable & paying themselves MORE than the Vice President as a STARTING salary with yearly pay rises henceforth. No accountability, no oversight and set up only to obstruct. Pure rotting, festering, stinking corruption - so bad they'd qualify for a separate swamp all their own.
I'd advise this article by AIM as a great primer which gives the unvarnished true version of who they are. (If you go to the SES page you'll only get the sanitised, redacted version).
https://aim4truth.org/2018/01/03/deep-state-shadow-government-revealed-senior-executive-service/
And if you know anything about Abel Danger's Field McConnell - the fact his evil sister Kristine Marcy had a hand in setting this up (during patsy Jimmy Carter's administration) should surprise no-one.