River City Bank announced that it hired Bank of Marin's former Chief Operating Officer Jim Kimball to expand into the North Bay. Kimball, with more than 30 years of experience leading commercial banking teams, also held leadership roles at Wells Fargo, Wachovia and Bank of America. At Bank of Marin, the Petaluma resident was responsible for commercial banking, retail banking, wealth management and marketing. Banks expanding their service territory is often driven by finding the right talent already familiar with the market. That was the case for River City's North Bay expansion. Kimball, who will be executive vice president and market president for the North Bay, will hire a locally based team to expand the bank's commercial banking presence in Marin, Sonoma and Napa counties.