CEO of the Global Sustainable Tourism Council (GSTC), a UN-created NGO managing the global sustainable tourism standards, the GSTC Criteria. His 40 years in tourism include senior leadership positions with major tour operators — President of Travcoa and Clipper Cruise Lines (both TUI brands), Executive Vice President of Tauck — plus a second career in sustainable tourism. He is a frequent advisor to governments and businesses on sustainable tourism policies and has served on many tourism boards, committees, and awards juries.