The tumultuous times continued for the staff at Boston magazine Tuesday as they watched three colleagues lose their jobs amid a corporate restructuring led by owner Metro Corp.

The job cuts, leaving the magazine with a staff of 52, follow the surprise departure of editor Carly Carioli. He announced his resignation to the staff two days before Christmas.

Tom McGrath, editor of sister publication Philadelphia magazine, was promoted to Metro Corp.’s chief content and strategy officer. He’ll oversee the search for Carioli’s replacement and both magazines’ news operations, Metro Corp. president Rick Waechter said.

Waechter said the company is planning to devote more resources to its newly named CityStudio business, which involves creating content for other companies, such as print publications or online stories posted on behalf of advertisers. McGrath’s new responsibilities include the launch of the CityStudio business.

Waechter and Metro Corp. chief executive David Lipson met with newsroom staffers on Tuesday afternoon to introduce them to McGrath and talk about the changes. Philadelphia deputy editor Patrick Kerkstra was promoted to take McGrath’s place as that magazine’s editor.

Meanwhile, Eric Mongeon, Rachel Slade, and Chris Vogel will run the Boston editorial operations, reporting to McGrath, until a new editor is found, Waechter said. McGrath will work in Boston two days a week during this time and will make frequent trips to Boston after Carioli’s replacement is hired, he said.

In total, the company trimmed seven jobs this week, leaving it with nearly 130 jobs in Boston and Philadelphia.

Senior editor S.I. Rosenbaum was among the staffers to lose their jobs. She had joined the magazine in 2013, soon after the collapse of the Boston Phoenix, where she had worked with Carioli.

“I’m really proud of what we were able to accomplish [and] I’m really sad to leave,’’ Rosenbaum said. “I felt very strongly that we had the right people in place and the result was clear to people around town.’’

Rosenbaum said the other journalists who lost their jobs in Boston, senior writer Erick Trickey and associate digital editor Olivia Rassow, are among the most talented colleagues she’s worked with. “It stings less to be in the company with them,’’ Rosenbaum said. “[But] journalism is a tough job to love right now.’’

Waechter, who is also Boston magazine’s president and chief executive, declined to divulge the company’s subscriber numbers or revenue figures.

He said readers won’t notice big changes following the cuts, and he expects the printed magazine to be an important part of the company for many years to come, even as the company seeks to expand its digital business.

“We still believe . . . that print leads the way and gives you credibility,’’ Waechter said. “We can still make money out of print. You just have to watch it a little closer than before.’’

Jon Chesto can be reached at jon.chesto@globe.com. Follow him on Twitter @jonchesto.