NORTHFIELD — Selectman Jed Proujansky is not seeking re-election after serving the town for 16 years.

Running unopposed for the seat is Julia Blyth.

The last day to register to be nominated was March 14, so anyone else who might seek the seat will have to run a write-in campaign in the May 3 election.

“This is a long-term plan that my wife and I were thinking about and working on since even before I was elected as selectman, and we’re still working on it,” Proujansky said. “I did not want to sign on for another term as selectman when I could not fulfill that obligation.”

Proujansky and his wife, Joan Deely, are considering moving out of the town after he retires.

But Deely, who also serves on several town boards, will fulfill her terms, and Proujansky said they have no plans to move out of Northfield immediately.

Proujansky has maintained an elected position in Northfield for 16 years, getting his start as a member of the School Committee. This is his first three-year term as selectman. Proujansky said that he still feels strongly about serving his town.

“I have dedicated a significant part of my life that didn’t have a financial payback because it’s important for people to do that,” he said. “And being an elected official had a lot to do with that for me.”

But Proujansky said that he didn’t work alone.

“I think there’s nothing that I have done, but a lot that we have done as a town,” he said. “It’s a ‘we’ that makes things work. It’s no one person.”

Prior to serving in Northfield, Proujansky said that he had been heavily involved in civil rights and political movements over the past 50 years. And during his time working on civil rights, he met his wife in Philadelphia.

“I don’t think the work I have done would be nearly as successful if she weren’t there with me. It’s always been a partnership — different roles— but we always worked as a team,” Proujansky said.

Proujansky said that he and his wife will look to continue to be part of Franklin County and that he will continue to do nonprofit and community work, including his work opposing the proposed natural gas pipeline, for which a compressor station has been planned for Northfield.

“I feel that people have a need to work beyond their selves. I felt through my participation I could make things better,” he said.