Agnesian HealthCare
St. Agnes Hospital
Fond du Lac County Health Care Center
Marian University
University of Wisconsin-Milwaukee
University of Wisconsin Medical School
In 1976, he held positions in the private practice of psychiatry, was executive director of the Fond du Lac County Health Care Center and the medical director of the Alcoholism Rehabilitation Unit of St. Agnes Hospital in Fond du Lac. From 1979 to 1980, Treffert was president of the State Medical Society of Wisconsin and from 1981 to 1987 was chair of its board of directors. He has also been the president of the Wisconsin Psychiatric Association and the American Association of Psychiatric Administrators. In 1995, he was appointed to the Wisconsin Medical Examining Board and, in January 2002, was elected its chair.[1]
Treffert maintained a website on autism, savant syndrome, and related conditions hosted by the Wisconsin Medical Society.[4][5] He held a research director position at the Treffert Center, Agnesian HealthCare in Fond du Lac, Wisconsin.[6]
Treffert died unexpectedly at his home in Fond du Lac on December 14, 2020.[7]