Well, lookie here

Ooooh.  Let me guess:  they gave him the "opportunity to resign"

According to Rep. Zoe Lofgren, a California Democrat who serves on the [January 6] panel, committee members have stressed their desire to speak with Ornato and he has retained private counsel. It’s not clear whether Ornato will end up testifying related to the claims from Cassidy Hutchinson, an aide to former Trump White House chief of staff Mark Meadows.

Sources told CNN that Ornato had been eligible for retirement since earlier this summer, and he had been discussing leaving the Secret Service since before Hutchinson’s testimony.

  CNN

Whatever.

....but hey, do what you want...you will anyway.

UPDATE:

[...] just two days before his planned interview with January 6 investigators.

[...]

Ornato had finally agreed to an interview with Department of Homeland Security investigators on August 31 after multiple attempts to arrange one. According to a memo sent by the Department of Homeland Security Office of Inspector General to the head of the Secret Service, DHS Secretary Alejandro Mayorkas, and DHS general counsel, the inspector general had been attempting to interview Ornato since June 29 and spent all of July and much of August following up.

[...]

Ornato has indicated that he still intends to attend the interview, according to an email obtained by The Intercept, but since Ornato will be a private citizen, investigators won’t have testimonial subpoena authority to compel his cooperation.

  Intercept