Democrat Robert Mayer will be making a return engagement with the Fairfield Board of Finance.

The Board of Selectmen on Wednesday unanimously approved Mayer's appointment to fill the vacancy created when Michael Tetreau was selected to be interim first selectman last month.

"When I was asked, I was honored," Mayer said. "I thought it was going to be a nice quiet summer."

Town officials recently learned that the Fairfield Metro Railroad Station could be anywhere from $2 million to $6 million over budget, and the Board of Finance has authorized an audit to the project since town is on the hook for those overruns.

Despite the challenges of sorting through the Fairfield Metro fiscal problems, Mayer said, "I'm looking forward to serving." He will fill the remainder of Tetreau's term, which expires in November.

Mayer previously served on the Board of Finance from 2003 to 2009.

"He was a great educational resource," Tetreau said of Mayer's previous stint on the finance board. "He was someone we all turned to, from both parties."

Finance board Chairman Thomas Flynn said the rest of the panel welcomes Mayer's appointment.

Mayer took the oath of office for the finance seat during the selectmen's meeting from Town Clerk Betsy Browne.