It’s been over a month since Randy Mastro made his return to City Hall as Eric Adams’ first deputy mayor.

“It’s been one of the most productive and rewarding months of my entire career,” Mastro said.

He may be the newest member of the Adams cabinet, but he’s one of the most seasoned, having served under former Mayor Rudy Giuliani.

Mastro hit the ground running on his first day, working on the mayor’s executive budget right away.

“Well, you always deal with the crisis of the day, but every day was focused on the budget and the preparation of the budget. It’s only been four weeks,” he said. “This team, this new team, it’s a new day here at City Hall.”

The former private attorney has already started making himself at home, transforming his office to an homage to his decades of work.

“The taxi and limousine commissioner gave me that,” he said while pointing to a decorative taxi cab on a shelf.

“You don’t recognize me without gray hair, but these go back to the 1980s,” he said of photos on the wall.

It’s not just his office that has undergone changes, Mastro has also taken a more public approach to his position, including wading into the political scuffles between the council and mayor.

“I gotta be me — if I see something, I’m going to call it out. It doesn’t mean I don’t respect the other people on the other side of the hall. I do.”

In his short tenure, Mastro has already generated controversy. He temporarily paused a housing project slated for the Elizabeth Street Garden, though he told NY1 last Friday the project remains unchanged and is on track to produce new affordable housing. Mastro also stopped small landlords from getting composting fines.

“I’m going to take a fresh look at some other things too, for the benefit of the mayor, this administration and this city. Get used to it.”

One of Mastro’s first tasks has been re-opening the ICE office on Rikers Island. The council sued the city over the move and the two sides of City Hall are now locked in a legal battle over it.

City Hall insists the proposal is about public safety and removing criminals from city streets. Councilmembers believe it’s a ploy by the Adams administration to aid in Trump’s deportation efforts.

“There’s possibly only nine months left in the mayor’s administration, you could be fighting this lawsuit until the end and not win. Do you believe this is the right approach to what you are trying to achieve?” NY1 asked.

“Well, there are thousands of lawsuits brought against New York City every year so the City Council can get on line. I hope it will be resolved very quickly by next month,” Mastro responded.

And how well is Mastro working with others?

“He walks around and just talks to everyone to make sure he’s listening to everyone. He doesn’t have all the answers. So he’s a very collaborative first deputy mayor,” Ana Alamanzar, first deputy mayor for Strategic Initiatives, said.

Alamanzar has been through her fair share of first deputy mayors; she was one of a few that chose to stay on despite the slew of resignations and controversies.

“I made a promise on the steps of City Hall, when I came in on May 26 with my family, that I was committed to the city,” Alamanzar said. “I look forward to coming in on January 1 and starting a new four years.”