Rueben started playing Ultimate in 2001. He played at WUCC in 2006 & 2010, and was an assistant coach for Australian teams at WUGC 2008 & 2010, and World Games 2009. Rueben has been a member of the WFDF Ultimate Rules Sub-committee since 2009 and was the Chair from 2010-2013. Rueben is also a co-founder and Director of the Indigenous Ultimate Association, an organisation which aims to encourage more Aboriginal and Torres Strait Islanders to play Ultimate.