Andrew Carstens is an engineer with an MBA, having worked in engineering, venture capital and management consulting over the last 30 years. In 2005 he was a founder of Envista Pty Ltd, an information technology company serving Defence and National Security clients. Envista grew rapidly and was eventually acquired by Australia’s fourth largest employer Downer EDI Ltd in 2018 to form Downer Defence Systems. In recent years, Andrew has pursued other growth business opportunities as an investor and director, including open source intelligence services business Worldstack, and reg-tech company CastlePoint, along with investments in a range of innovative companies in sectors including battery, solar, soil conditioning and carbon capture, as well as a craft brewery. Andrew invested in Halocell Energy.