City Councillor-elect Frank Baker and his two five-year old children, Maxine and Benjamin, on Monday afternoon outside of his campaign office on Savin Hill Ave.

On January 2, some 25 years after starting out as a custodian at City Hall, Frank Baker will be sworn in as the District 3 city councillor.

While at Don Bosco Technical High School, he took a part-time job with the city, then went full-time after he graduated. Soon afterward, he moved into the city’s printing department and worked there from 1987 to 2010, when the department was shuttered due to budget cuts. He then briefly took a job with Amtrak, leaving that position this year to campaign for and win a City Council seat, earning 56 percent of the vote in District 3 for the two-year term.

Baker, 43, is succeeding Councillor Maureen Feeney, who declined to run for another term after 17 years in office. She officially resigned earlier this month.

“I think my first order of business is I want to try to get a district office and go from there,” Baker said this week. Baker is currently maintaining a presence at his storefront campaign office on Savin Hill Avenue. His committee said last week that they would extend the lease on that office after learning that Feeney had left the council earlier than expected.

District offices don’t come cheap, and few city councillors have maintained one. Former Councillor Chuck Turner has claimed he ran up a $170,000 debt attempting to keep his Roxbury-based office open during his 11 years on the council. Turner, who represented Roxbury, Dorchester, the South End, and the Fenway, was booted off the council last year after a jury found him guilty of accepting a $1,000 bribe in his district office.

Nowadays, some councillors tend to hold “office hours” in coffee and bagel shops.

But Baker said several state representatives will help split the costs of the District 3 office, which will likely be located somewhere outside of Savin Hill, where he lives. The details are still being hashed out, Baker said. “We want to try to make it as convenient as possible.”

State House lawmakers proved key to the Baker campaign, which had the endorsements of state Rep. Marty Walsh, a childhood friend of Baker’s, and several of his Beacon Hill colleagues. It will likely be staffed with employees from his office as well as theirs, said Baker.

The councillor-elect has been holding meetings with other councillors and elected officials, as well as dropping by events like the Dorchester Speaker Forum in the Ashmont neighborhood, a turkey dinner at the Murphy School, and St. Brendan’s Bazaar.

Next month, he’ll be hitting the civic association meetings and handing out his number, he said. Before then, he plans to hang out with his five-year-old twins, Benjamin and Maxine, to make up for the time lost over the last year while he was on the campaign trail.

Along with setting up a district office, Baker has pledged to file an ordinance calling for an overhaul of the Boston Public Schools’ bus fleet and the installation of a district-wide e-mail alert system focusing on crime information.

In a proposal released during the campaign, Baker called for the city to contract with smaller bus companies and to redevelop the central bus depot at the intersection of Freeport Street and Dorchester Avenue. The 122,700-square-foot depot is considered a main source of everyday traffic congestion. Baker has said he would file the ordinance within his first 30 days in office. This week, he said he plans to hold a meeting on the depot within the first 30 days.

As to his e-mail proposal, Baker wants to expand the alert system currently in use in Savin Hill and St. Mark’s neighborhoods to the entire district. The e-mails notify residents of break-ins, assaults, and other criminal activity in the neighborhood, using police data. The Baker campaign said he would assign a staff member to coordinate the expansion of the system in his first 60 days in office.

Asked if he was interested in taking office earlier than anticipated, with Feeney leaving the seat vacant for the next month, Baker said he would if city officials asked him.

“The people who make those decisions haven’t reached out to me,” he said, adding that he is focused on using the next month to assemble his staff.