Simon was appointed in 2002 as a Consultant surgeon in orthopaedics and trauma at Stockport NHS Foundation Trust. He gained qualification in medicine in 1990 at Manchester University. He became a Fellow of the Royal College of Surgeons in 1994. The Royal College of Surgeons awarded him the Laming Evans fellowship for research in 1995. He completed his higher surgical orthopaedic training in 2002.

Mr Reuben's clinical interests include surgery of the hip and knee including limb trauma surgery and the prevention of deep vein thrombosis following lower limb surgery. He specialises in hip and knee surgery including: hip resurfacing, acl reconstrucrtion, knee arthroscopy, joint replacement (total and partial) and sports injuries of the lower limb.

Mr Reuben annually performs approximately 200 arthroscopic "key-hole" knee operations. These are for a variety of conditions including anterior cruciate ligament (ACL) injury, meniscal tears, patella mal-tracking, and sports related injuries. In addition he performs approximately 150 joint replacements of hips and knees including: total knee replacement, partial knee replacement (Oxford uni-compartmental knee, Avon patello-femoral), and total hip replacement (using cemented and un-cemented methods).

For hip replacement surgery he uses digital templating of a patient's X-rays to improve accurate reproduction of hip biomechanics, which reduces the risk of leg length discrepancy as a complication. He uses the posterior approach, which reduces the risk of a limp following surgery and provides excellent exposure of the hip joint to allow precise placement of the components. Dependent upon the specific requirements of an individual patient an implant will be selected from hip resurfacing (metal on metal), hard bearing hip replacement (ceramic on ceramic or metal on metal) or traditional design hip replacement.