Dr Kolnick received his B.D.S. cum laude from the University of the Witwatersrand, in Johannesburg, South Africa. He was the first dental school graduate to be awarded the prestigious University Scholarship for Overseas Postgraduate Study. In 1982, he completed his postdoctoral endodontic training at Columbia University School of Dental and Oral Surgery in the City of New York.

For the past 35 years, Dr Kolnick has been in private practice limited to endodontics in Westchester County, NY. His practice, Advanced Endodontics of Westchester, includes a partner and three associates and is dedicated to fostering excellence in endodontics through education and the incorporation of the latest technology. In 2011, Dr. Kolnick created The Endodontic Microsurgery Group in a unique, state-of-the-art facility dedicated entirely to endodontic microsurgery and sedation.

Dr Kolnick has been committed to endodontic education, first as an Associate Clinical Professor in Endodontics at Columbia University and then as an Attending at Westchester Medical Center and an Associate Clinical Professor in Endodontics at New York Medical College. Although he no longer holds these positions, he continues to lecture extensively on a local, national and international level and has published several articles on endodontics.