The embattled head of the city’s Department of Social Services claimed his ex-staffer-turn-whistleblower was fired due to unprofessional conduct with coworkers — not because she complained about an alleged cover-up that the agency illegally allowed migrant families to sleep on the floor.

Mayor Eric Adams’ DSS Commissioner Gary Jenkins said his former top press aide, Julia Savel, had “documented instances” where she was “unprofessional with her peers, with her subordinates and with senior management,” during a television interview that aired Thursday evening on CBS2.

Neither City Hall nor DSS returned an immediate request for comment from The Post when asked to elaborate on Jenkins’ claims, which were his first public comments on the matter.

Savel was fired on Aug. 5 after she complained internally about Jenkins’ alleged failure to notify City Hall that his agency violated the Big Apple’s long standing “right to shelter” statute, which requires the city to provide temporary housing to individuals by 4 a.m. if they make the request before 10 p.m.

Migrants who recently arrived from the southern border slept overnight at the city’s Bronx-based PATH intake center on July 18.

Jenkins eventually admitted the city violated the standard, but Savel claimed the commissioner slow-walked notifying City Hall.

The city’s watchdog agency — the Department of Investigations — opened a probe into the scandal last week. 

Savel told The Post in a statement she stood by her previous claims, adding that her job performance was never an issue while serving as a city employee.

“When I arrived at the PATH intake center with Gary Jenkins, and his Chief of Staff Karen St. Hilarie on the night of July 20th when multiple violations of right to shelter were made public, I was privy to all information being shared by my colleagues in senior leadership and my input was requested by both Gary and City Hall,” Savel said.

“The minute I refused to issue a false statement to the press stating the city was meeting the legal mandate — as directed by Gary — was the moment when I was excluded and the active cover up began. My performance was never in question, I never was alerted to any documented instances of misconduct, and I worked tirelessly on behalf of the most vulnerable New Yorkers. During the time I worked for the city, I held truth, transparency, and decency above all else until the day I was unjustly fired. I can’t say the same about Gary Jenkins.”

Savel sat for a roughly three-hour interview on Monday with five DOI investigators, said a source familiar. 

She then turned her personal cell phone over to DOI investigators on Wednesday after consenting to their request for a “full forensic image,” according to an email copy obtained by The Post. 

The DOI requested copies of text messages and Savel’s call log with nearly a dozen City Hall and DSS staffers, per the email. 

The officials include Jenkins, his chief of staff Karen St Hilaire, City Hall Deputy Mayor Anne Williams-Isom, City Hall Communications Director Max Young, First Press Secretary Fabien Levy, Deputy Press Secretary Kate Smart and others.

The DOI declined to comment when reached by The Post.