Public works and other municipal employees in Newton have joined forces with the Teamsters Local 25 union, a spokesman announced on Monday.

The decision comes against the backdrop of ongoing contract negotiations with the city and a close mayoral race that Ruthanne Fuller won without union support last fall.

But both union members and the mayor downplayed the impact of the election on the move to join a far bigger labor organization.

“Good union representation is vital to [our employees] and to us,” Fuller said in an interview hours after a meeting Tuesday with local union presidents, which included a representative from the Teamsters.