A longtime California bank regulator and executive has joined the board at Hanmi Financial in Los Angeles.

Thomas Williams started June 1, the $4.3 billion-asset holding company said in a press release Tuesday.

Williams was a senior vice president and chief risk officer at the $7.6 billion-asset BofI Federal Bank in San Diego, where he oversaw all risk-related functions including regulatory affairs and compliance for four years before he retired in June 2015, according to his LinkedIn profile.

Williams started his career as an examiner with the Office of the Comptroller of the Currency in 1985. Ten years later he joined the Federal Reserve Bank of San Francisco, where he was the lead supervisor of Wells Fargo and served on the Basel Committee on Banking Supervision's credit risk modeling task force.

Starting in 2001, Williams worked for six years as the director of regulatory relations at Silicon Valley Bank in Santa Clara, Calif., and later served as executive director of commercial credit review at Capital One Financial for two years.

"His expertise and creativity in enabling innovative yet sound banking activities will be invaluable to Hanmi," its chairman, Joseph Rho, said in the release.

Hanmi last November made an unsolicited offer to merge with BBCN Bancorp in Los Angeles, but BBCN in December agreed to buy Wilshire Bancorp for $1 billion.

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