Citi announced changes to its leadership team and structure as it works to continue increasing its shareholder returns.By completing this form, you agree to receive marketing communications from PYMNTS and to the sharing of your information with our sponsor, if applicable, in accordance with our Privacy Policy and Terms and Conditions .Complete the form to unlock this article and enjoy unlimited free access to all PYMNTS content — no additional logins required.Mark Mason will transition out of the role of c ...