Mooradian will succeed Earle Malm, who is scheduled to retire in July after 10 years of association with HighMark as president and CEO, the bank said.
Effective from 1 August 2012, he will also act as chairman of the board of directors of HighMark Capital Management.
HighMark Capital Management offers a comprehensive suite of investment solutions for retirement plans, public agencies, corporations, educational institutions, foundations, endowments, and high-net-worth individuals.
As of 31 March 2012, UnionBanCal has assets of $92.3bn and trades as a wholly-owned subsidiary of The Bank of Tokyo-Mitsubishi UFJ, which is a subsidiary of Mitsubishi UFJ Financial.
