Community Bank chairman Frank Tsai said: "Bill was instrumental in developing and executing the business and capital plan that allowed Community Bank to expand into two new markets and set the ground work for our goal of becoming the premier relationship bank in the Bay Area."

With over 20 years of banking experience, Keller has been serving as the Bank’s president and chief operating officer since early 2009 and prior to joining the Bank was chief operating officer at Diablo Valley Bank since 2003.

Prior to Diablo Valley Bank, he was chief executive officer of Bay Bank of Commerce and executive vice president of Mid Peninsula Bank, both wholly owned subsidiaries of Greater Bay Bancorp.

At Greater Bay Bancorp, he was a member of the Senior Management Committee and managed the Bank’s initial expansion into the East Bay.

Before joining Greater Bay Bancorp in 1999, Keller was a senior vice president and regional manager with Oakland-based Civic Bank of Commerce for nine years.