TYLER, Texas, Dec. 20, 2021 (GLOBE NEWSWIRE) -- Southside Bancshares, Inc. (the "Company") (NASDAQ:SBSI), the holding company of Southside Bank (the "Bank"), announced the appointment of Alton L. Frailey to the Company's board of directors on November 24, 2021, effective January 1, 2022, increasing the size of the Company's board to 17 members. Mr. Frailey was also appointed to the Bank's board of directors, effective January 1, 2022, increasing the size of the Bank board to 18 members. Residing in the greater Houston area, Mr. Frailey is President of Alton L. Frailey & Associates, LLC, specializing in leadership development, community engagement, school board team building and executive