Terry is an author, lecturer and strategist on energy and the environment. In 1993, Terry founded the Santa Monica BayKeeper and later served as the Executive Director of the Environment Now Foundation in Santa Monica, CA.
He was appointed as the Secretary of the California Environmental Protection Agency in November 2003 by Governor Arnold Schwarzenegger and was later appointed Cabinet Secretary, the Chief Policy Advisor to the Governor. In February 2007, Tamminen founded the non-profit organization Seventh Generation Advisors and was appointed as an Operating Advisor to Pegasus Capital Advisors.
Terry’s most recent book is Cracking the Carbon Code: The Keys to Sustainable Profits in the New Economy (Palgrave).