Curtis most recently served as executive director of the Partnership Project, which facilitates collaboration among 19 national environmental groups.

Curtis previously served as the chief program and advocacy officer at the Climate Reality Project. He was also a Deputy Director of the Pew Environment Group where he was responsible for campaign operations as well as the global warming and a number of other issue campaigns.  Curtis also worked for a decade at the National Environmental Trust, a multi-issue environmental advocacy and communications organization that merged with the Pew Charitable Trusts.