John Mahoney

Chief Executive Officer

John Mahoney is Chief Executive Officer and member of the Board of Directors at OpTerra Energy Services. As chief executive, John directs OpTerra’s long-term growth strategies, ensuring that the organization accomplishes its mission and vision to deliver sustainable energy solutions to its core markets across the country. John is responsible for ongoing financial planning, executing OpTerra’s business development and operations strategies, and the continued success of OpTerra’s three national divisions focused on the public sector, controls, and commercial and industrial markets.

John has more than 25 years of leadership experience in the energy efficiency and renewable energy field. Prior to taking the senior leadership position at OpTerra, John was Senior Vice President of Chevron Energy Solutions and the former President of Viron Energy Services, leading both organizations through significant periods of growth and innovation in the industry. Over his time in the industry, John has been involved in developing over $4 billion dollars in comprehensive energy projects.

John started his career at Honeywell, where he held several leadership positions in business development, product marketing, and strategic planning. John received his Bachelor’s degree from the University of Minnesota, and participated in executive leadership training at the University of Southern California, as well as at the International Institute for Management Development in Switzerland.

John is the former president of the National Association of Energy Service Companies (NAESCO) and currently sits on its Executive Board. He is also a member of the Association of Energy Engineers (AEE) and other industry and civic organizations, including a member of the board for the Foundation for the City College of San Francisco.

Leadership Team

Ryan Blair


Brad Boerger

Vice President

Lindsey Corbin Nehls

Vice President

Mark Emerson

Chief Marketing Officer

David Frederick

General Manager

Sean Fuller

Vice President

John Gajan

Vice President

Scott Johnson

Vice President

Evelyn Struck

V.P. of Human Resources

John Sullivan

Chief Financial Officer