The security officer for Labor Secretary Lori Chavez-DeRemer has resigned following an internal investigation into claims of an “inappropriate” relationship with her, as confirmed by The Post.

Sources indicate that Brian Sloan left his position last week after being placed on leave while the inspector general’s office looked into allegations of an affair with the married secretary.

Chavez-DeRemer is accused of exploiting her authority to initiate a workplace romance that crossed professional boundaries with her subordinate, according to sources and a complaint filed with the Department of Labor’s Office of Inspector General, as initially reported by The Post in January.

The complaint suggests that the labor secretary participated in unprofessional exchanges with Sloan during trips to Las Vegas last year.

Requests for comments from the Department of Labor, Chavez-DeRemer’s attorney, and Sloan have so far gone unanswered.

Politico first reported Sloan’s resignation on Thursday night, shortly after two of Chavez-DeRemer’s senior aides resigned amid distinct allegations of staff mistreatment and improper use of public funds.

Chavez-DeRemer’s chief of staff Jihun Han and deputy Rebecca Wright resigned earlier this month under pressure from the White House. 

A fourth staffer, Chavez-DeRemer’s Director of Advance Melissa Robey has been sidelined as well. 

A person familiar with the probe said Robey had expensed a multi-thousand-dollar limousine ride during a departmental excursion to North Dakota and turned in vouchers for excessive travel-related expenditures on other vehicles as well as hotel stays.

The initial IG complaint accused the secretary of having Han and Wright “make up” official trips to destinations she visited for personal reasons — including the ex-Oregon congresswoman’s home state; Arizona, where she has a second home with her anesthesiologist husband; and Las Vegas.

Additional complaints submitted against Han and Wright during the investigation accused the pair of exerting improper influence over junior staff, sources said.

People familiar with the probe indicated that investigators had gathered sufficient evidence of a “toxic” work environment created by the two ex-staffers, including verbal abuse and waste of departmental resources on personal travel.

IG investigators have also heard that the embattled secretary took subordinates to an Oregon strip club during an official departmental visit in April 2025.

The White House has defended Chavez-DeRemer, with press secretary Karoline Leavitt saying Jan. 15 that President Trump “thinks that she’s doing a tremendous job at the Department of Labor on behalf of American workers.”