Mark is an Internet and aerospace entrepreneur based in Christchurch. He is CEO of Kea Aerospace, which develops solar-powered, stratospheric UAVs for aerial imaging and monitoring, and President of Aerospace New Zealand, whose mission is to promote the interests of the New Zealand aerospace community. He was a seed investor in Rocket Lab, where he served as co-Director until 2011, and in 2025 he flew to space with Blue Origin.