Rueben was appointed as Chair of the Board from 1 October 2021 until 30 September 2025. Rueben is a Gunditjmara man and the founder and Managing Director of RJHB Consulting. Rueben is also a Commissioner for the Victorian Environmental Water Holder, a member of the Heritage Council of Victoria, and a Member of the First Peoples’ Assembly of Victoria. In addition, Rueben is a founder of Indigenous Architecture and Design Victoria and a Board Member of the Australian Communities Foundation. He is also a founder and director of the Indigenous Ultimate Association and the Chair of the Ultimate Rules Sub-committee for the World Flying Disc Federation. He has a Bachelor of Architecture.