Ron van der Zwet ran a therapeutic practice in Gossau for over 34 years, specializing in osteopathy and craniosacral therapy. The practice was located in the Gossau medical center at Lerchenstrasse 30. As of March 1, 2026, the Gossau location has been closed. Ron van der Zwet continues his work exclusively at his practice in Teufen. The services included gentle manual treatments to restore physical balance and activate the body's self-healing powers.