The ex-boyfriend of a Department of Homeland Security official whose “sugar daddy” allegations against the government worker led to her being placed on leave has been identified by sources as a bigwig defense contractor.

Robert Bianchi, who owns a federal defense contracting firm in Maryland that’s raked in tens of millions of dollars worth of government of contracts in two years, had a three-month fling with DHS Deputy Assistant Secretary for Counterterrorism Julia Varvaro — but the relationship “ended badly,” sources claim.

That implosion resulted in Bianchi filing a complaint with the DHS Office of Inspector General to review Varvaro’s conduct — including her allegedly maintaining a profile on the so-called “sugar daddy” website Seeking and having smoked marijuana while serving in the Trump administration.

The Daily Mail first reported that a business executive named Robert B. spent “$30,000-$40,000 for vacations, Cartier jewelry, expensive handbags, and various shopping trips” on Varvaro before their romance recently ended.

Bianchi “added a lot of false information” to his DHS OIG complaint, including the allegations of drug use and that other sugar daddies footed the bill for Varvaro’s tuition, according to a source, who said her parents paid for the education.

“Robert B.” told the Daily Mail that the pair met on Hinge, a dating app, they dated for several months, and that he took her on lavish vacations to Aruba, Italy and other destinations.

He complained to the Daily Mail that she often ordered pricey items on the menu when they dined together.

A person with knowledge of the relationship claims that Bianchi voluntarily took Varvaro on trips and that he’s trying to threaten her job because the relationship didn’t work out.

“He was on those trips too and seemed to enjoy them,” the source asserted.

The source also noted that Varvaro was not suffering from “financial stress” at the time of their dalliance. 

Bianchi, who is at least 57, “constantly bragged he dated 21-year-olds” and that Varvaro, 29, “was on the older end of his usual range,” the source added. 

He did not respond to requests for comment from The Post.

Bianchi’s Maryland firm, SDVO Solutions, LLC, has received over $67 million in federal government contracts beginning in 2015 — nearly a third of which came just in fiscal years 2025 and 2026, according to government records reviewed by The Post.

The company does IT and telecom work and had its biggest year in 2025, with contracts from the Department of Defense, the Department of Health and Human Services, and others. The firm advertises itself as being run by a service-disabled veteran CEO.

There is no indication that Bianchi was awarded those contracts as a result of his alleged relationship with Varvaro.

Varvaro has a master’s degree and a PhD in homeland security, and worked at the Federal Emergency Management Agency before coming on as deputy assistant secretary for counterterrorism at DHS in May 2025, according to her LinkedIn.

The Daily Mail reported that “Robert B.” filed a complaint with the Department of Homeland Security OIG against Varvaro, alleging the counterterrorism official had a profile on the sugar daddy website and he “did not want a sugar daddy/prostitution relationship.” 

The complaint triggered an internal investigation and led to Varvaro being placed on leave.

“Horrible that it sets a stigma that if a relationship ends badly, the man can try to jeopardize your job and destroy your reputation,” the source said. “For a man to think he has the authority to try and ruin a much younger woman just because he didn’t like the outcome is horrible.”

Neither DHS nor the DHS OIG responded to a request for comments on Bianchi’s ID or government contracting.