Deon worked in Durban until 1998. Whilst in Durban he had a hugely successful practice involving working with Richard Turnbull who was involved with the 1995 Rugby World Cup, Sharks Rugby Players, Dolphins Provincial Cricketers, Provincial Hockey Players. He also assisted with the Comrades Ultra Marathon medical organising.
“The Comrades Marathon is an ultra marathon of approximately 89 km (approx. 56 miles) which is run annually in the Kwazulu – Natal Province of South Africa between the cities of Durban and Pietermaritzburg. It is the world's largest and oldest ultra marathon race. The direction of the race alternates each year between the "up" run (87 km) starting from Durban and the "down" run (89 km) starting from Pietermaritzburg.”
He also completed his Masters degree in 1994, focusing on the rehabilitation of Scoliosis.
In 1998 Deon relocated to Johannesburg to assist Mueller Sports Medicine (American Sports Medicine Company) with the establishing of their business in South Africa.
Whilst in Johannesburg he also lectured Biomechanics to the Chiropractors at Wits University. He co-established the foot foundation with the late Dr Pierre Rossouw. The practice was situated in Sandton and dealt with lower limb problems from all aspects and all categories.