Clayton is a sustainable transport leader with 25 years of international experience building innovative companies to address climate change and promote inclusive communities. He leads teams and strategy, develops major partnerships, and applies expertise in transportation, urban planning, and technology.

Clayton led two of world’s top environmental and mobility think-tanks to shape best practice and implement precedent-setting projects in over 50 cities on 4 continents at ITDP (CEO) and WRI (COO EMBARQ and Co-Founder of WRI Cities). He founded highly successful PhillyCarShare from start-up to market leader, earning an EPA Environmental Achievement Award and Harvard Innovation finalist. Clayton successfully led global policy, sustainability, and strategic initiatives for micro-mobility pioneer Bird. He developed mobility consulting and tech start-up GoAscendal (C-level) to global presence spanning the Americas, Africa, and Asia.

A recognized thought leader, Clayton has overseen globally recognized guides including the Bus Rapid Transit (BRT) Standard, BRT Planning Guide, Equitable Transit Oriented Development Standard, Safer By Design, Bike Share Planning Guide, and research on climate finance, traffic safety, and shared electric AVs. Clayton serves as Board Chair of Shared Use Mobility Center. He has lived abroad in Cape Town, Bogotá, and London.