Trustmark in Jackson, Miss., has named Granville Tate Jr. its top legal eagle.

Tate, a longtime member of the Mississippi law firm Brunini, Grantham, Grower & Hewes, is scheduled to become general counsel of the $12.2 billion-asset Trustmark's banking arm on Jan. 1. He will also be secretary of the parent company.

He succeeds T. Harris Collier III, who plans to retire Dec. 31 after 42 years with the company.

Tate has long been a "trusted advisor" for Trustmark, Chief Executive Gerard R. Host said in a news release Tuesday. "His vast experience in corporate law, mergers and acquisitions, and governance, combined with regulatory and compliance knowledge, makes him ideally positioned for this role," Host said.

Trustmark's third-quarter profit fell 15% because of because tighter loan margins and higher expenses. It has made several acquisitions in the last four years, including its $55 million purchase of BancTrust Financial Group in Mobile, Ala., in 2013.

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