- Aircraft Owners and Pilots Association
- American Association for Justice
- Association of Trial Lawyers of America, Chair, Aviation Section (1980-1982)
- Aviation Editor of Trial Talk (CTLA Publication) (1989-2005)
- Colorado Bar Association
- Colorado Trial Lawyers Association
- Denver Bar Association
- Experimental Aircraft Association
- Illinois Bar Association
- Lawyers-Pilots Bar Association
- Michigan Trial Lawyers Association, Executive Board (1975-1983)
- National Business Aviation Association
- Public Justice Foundation
- Seaplane Pilots Organization
- State Bar of Michigan, Past Chair, Science and Technical Section
- University of Colorado, Aerospace Engineering Sciences External Advisory Board
- University of Colorado, Colorado Law, Schaden Chair in Experiential Learning