Tommy Ah Teck holds a B.Sc. (Hons) Engineering from the University of Westminster and an M.Phil. in Mechanical Engineering from Loughborough University of Technology. He worked as a Trainee Accountant with Griffin & Partners, Chartered Accountants in London, UK. He has also attended several executive management programmes at NUS - Stanford University and INSEAD.

He occupied the post of Managing Director of Gamma from 1987 to January 2011 and was appointed Group CEO in February 2011. In July 2015, he was no longer an Executive Director, and remained as a member of the Board in a Non-Executive capacity. He also chairs the Gamma Foundation. 

In April 2020, he has been appointed as the Executive Chairman of the Company.