Tony Mayfield UMB Bank NA, a subsidiary of UMB Financial Corp. (Nasdaq: UMBF), promoted Tony Mayfield to chairman and CEO of UMB Bank’s Greater Missouri region. In his new role, Mayfield will be responsible for the strategic leadership of UMB teams in various communities throughout Missouri. Mayfield has more than 23 years of experience in the banking and financial services industry. Prior to his new role as chairman and CEO, Mayfield served as president of UMB’s central Missouri region.