Southside Bancshares, Inc. announced that effective December 31, 2016, in connection with the board-approved succession plan previously reported in the company's current report on Form 8-K filed June 15, 2016, Sam Dawson retired as Chief Executive Officer of the company and the company's subsidiary, Southside Bank. As previously reported, Mr. Dawson will continue as a member of the board of directors of the company and of the bank. Also effective December 31, 2016, President Lee R. Gibson assumed the additional position of Chief Executive Officer and will serve as President and Chief Executive Officer and as a director of the company and of the bank.