Gregg brings more than 30 years of experience working on climate, environmental, and public policy issues, including more than 25 as an Executive Director. At Climate Solutions, Gregg oversees a staff of more than three dozen policy experts, campaigners, innovators, and researchers across Washington and Oregon, providing strategic direction for one of the most effective regional climate and clean economy organizations in the nation. Under his leadership, Climate Solutions and our many allies have successfully passed some of the best climate policies in the United States.

Prior to coming to Climate Solutions, Gregg served as the Executive Director of Toxic-Free Future for 7 years and as the Executive Director of the California-based Pesticide Watch for 5 years. During that time, he played a leadership role in creating and developing a number of leading coalitions working on environmental health issues in Washington state and nationally. At Climate Solutions, he helped to found the Washington-based Alliance for Jobs and Clean Energy and Renew Oregon, and has served on the executive committee of multiple statewide climate change ballot measure campaigns including Yes on I-1631 in 2018 and No on I-2117 in 2024.

Gregg began his professional career in 1993 as an organizer for Green Corps, working in Washington, DC, Vermont, and California. He received his B.A. in Political Science from Dickinson College.

When not at work, Gregg spends time with his family and raising awareness about Cystic Fibrosis, a genetic disease that his son Jude has and that he is passionate about finding a cure for.