A leaked Oath Keepers membership list contained more than 300 individuals who claimed to have worked in the Department of Homeland Security, with some listing themselves as current employees. https://www.rollingstone.com/politics/politics-news/oath-keepers-worked-department-homeland-security-1234646005/
Hundreds Of Oath Keepers Have Worked for the Federal Government: Report 

309 listed members of the extremist group reported having worked for various DHS agencies, including the Secret Service and Border Patrol

Rolling Stone
@RollingStone Looks to me like some federal agencies are partial to people with big egos, lots of hubris and an attitude that "they alone can fix it."