Mr. Michael Kirwan CIO Yahoo! Michael Kirwan is Yahoo!’s Chief Information Officer. In this role, Kirwan has global responsibility for Yahoo!’s Corporate Systems group, which includes the IT Infrastructure, Corporate Applications, CRM and Premium Services Infrastructure teams. These teams ensure Yahoo!’s internal systems and billing / anti-fraud services are available 24/7. Before joining Yahoo!, Kirwan was at VeriSign, where he held numerous management positions in Production Operations, Network Support and Corporate Systems Support and most recently served as Vice President of Global Customer Support and Business Operations. Prior to that, Kirwan held several management positions in the banking industry at companies such as Bank of America, Bank of California, and Union Bank of California.