Porritt formerly served as Chief Risk Officer of Greater China and North Asia, Standard Chartered Bank. He was a board member of Standard Chartered Bank Korea Ltd and Standard Chartered Bank (Taiwan) Ltd. During 2008 to 2015, Porritt held a variety of roles, including Senior Regional Credit Officer, Corporate, Institutional & Commercial – MENAP, Africa, Europe & Americas; Chief Credit Officer, Hong Kong & Japan; and Regional Head, North East Asia, Group Special Assets Management of Standard Chartered Bank.