Dr Marks graduated from the University of Witwatersrand South Africa in 1981 with a (BDS) Bachelor of Dental Science in Dentistry. He then practiced as a dentist for 8 years. Following dental school, he completed his (MSc Dent) Master of Science in Dentistry in 1991 and completed an additional three year orthodontic residency at the University of Witwatersrand, obtaining his (MDent Ortho) Master of Dentistry in the Specialty of Orthodontics in 1991.
Dr Marks has been in private practice since 1981. In 2000 he moved from South Africa to Sydney and commenced practice in Pymble.
With additional training as a specialist in orthodontics, his practice specialises in diagnosing and treating patients in need of orthodontic care and provides outstanding orthodontic treatment for children, adolescents and adults.