A graduate of Toi Whakaari (Wellington – 1978), New Zealand’s premier Theatre Arts academy, Mark spent 15 years as a professional actor, director, playwright and opera singer. He has since spent the last 25 working globally in leadership roles. After five years with Greenpeace (1990–94), he became ED of Sustainable Cities (1995–2000) and then of the “Redesigning Resources Business Leadership Group” (2000–04). The author of two books on sustainable best practice (2002 & 2004), he wrote a syndicated column for NZ’s Business Monthly from 1996–2005.
Challenging his fading acuity (35yrs after undergrad) , he completed in 2016 a Masters (Hons) in International Law & Politics and continues to write occasional journalistic pieces while frequently presenting as a provocative speaker from TED to New Frontiers, to the European Environmental Foundation.

Founding Director of the Hillary Institute of International Leadership (2006–), he is also Director of Maven Ltd, a social entrepreneurship consultancy based in NZ and the ED of Untouched World Foundation. An advisor to the Katerva Challenge for innovative climate solutions (Canada) and Climate Changers (US), he is widely-regarded as an independent thinker and partnership broker.