LEWISTON — Androscoggin Bank — with centers in Lewiston, Auburn, Brunswick, Gray, Jay, Lisbon Falls, Livermore Falls, South Paris, Turner and Portland — recently hired Jennifer Arnold as assistant vice president, business and government services, and Paul Collins, as vice president and commercial loan officer. Previously, Arnold worked at TD Bank and Collins worked at People’s United Bank. They will be based at the Androscoggin Bank location in Portland.