After completing a Bachelor of Science degree with Honours through the University of New England, Rex was involved in NSW Agriculture research into control of woody weeds based in Cobar, NSW. This work focused on strategic grazing using goats with subsequent follow up with herbicide applications. In 1997, Rex moved to Wagga Wagga to undertake research at Charles Sturt University into glyphosate resistance in annual ryegrass. An expansion of the research program to also include agronomic studies of transgenic crops led to commencement of a Ph.D looking at the broader implications of the role of glyphosate in future southern Australian farming systems. Rex is currently a Post Doctoral Fellow with the Graham Centre, an alliance between Charles Sturt University and NSW Department of Primary Industries. His current research focus is on a Meat and Livestock Australia funded project on innovative control of silverleaf nightshade and prairie ground cherry. In addition to research commitments, Rex has been an active member of the Weed Society of New South Wales for seven years and has held various positions on the Executive Committee. Rex was also a member of the National Glyphosate Sustainability Working Group (2004-2008).