New Canaan’s legislative body on Monday night voted to fill a vacancy in the 12-member group with a father of twin kindergartners who has resided in New Canaan for two years and works as an attorney. Mike Mauro will fill a Town Council seat previously held by fellow Republican Ken Campbell, following an 8-3 vote during a special meeting at Town Hall. He was one of two candidates for the open seat, along with Democrat Colm Dobbyn, a 25-year resident of New Canaan and attorney who is the longest-serving member of the Inland Wetlands Commission. Describing himself and his wife, Melissa, as family-oriented young parents and hard-working professionals—she works for a commodities firm based in Switzerland—Mauro said he specializes in labor employment and views his candidacy for the Council as an opportunity to give back to a town he and Melissa quickly embraced after falling in love with its schools. “You know, it’s getting tougher and tougher to get into this town—it’s getting tougher and tougher to stay in this town,” he said during the meeting, attended by about 50 people including First Selectman Kevin Moynihan, Selectman Kit Devereaux and several members of the Democratic and Republican Town Committees.