Since 1984, he has served on the United States Olympic Committee Sport Psychology Registry and has consulted with a number of international sport federations.

Ungerleiders' books include;

In the early 1990's, Ungerleider was invited to join an international team of researchers to examine the East German doping files, monitor the criminal trials and interview hundreds of witnesses for his fourth book entitled: FAUST'S GOLD: Inside the East German Doping Machine (St Martin's Press).

In December, 2001, Faust's Gold was honored as top "sports book of the year" by Runner's World/Rodale Press. Ungerleider's work has been reviewed in Elle, Longevity, Outside,  Runner's World, Allure, New York Daily News,  San Francisco Chronicle, Boston Herald, Dallas Morning News, The New York Times, Chicago Tribune, Los Angeles Times, The New Yorker Magazine, Sports Illustrated,  the International Herald Tribune, People Magazine, Forbes Magazine, the Washington Post, Newsweek and National Public Radio.

Ungerleider's East German Doping research is the subject of a one-hour documentary by the Canadian Film Company, as well as a one-hour special by ABC's 20/20, and NOS of Dutch Television.

Prior to the 2006 Torino Winter Games, Ungerleider was appointed to the International Society for Olympic Historians (ISOH). He has served as a founding trustee of Justice For Athletes (JFA) which encourages mentoring and fair play at all levels of sport. JFA is the sponsoring agency of the Culture, Education, Drug-Free Sport and Ethics (CESEP) program. Ungerleider has also served on the education and ethics committee of WADA; World Anti-Doping Agency.