1. Member, American Society of Civil Engineers (1957-present)
(a) Member, Committee on Biological Flow of the Engineering
Mechanics Division (1973-1976)
(b) Chairman, Technical Activities Committee of Civil
Engineering in Biomedicine and Health Care Systems (1974-1981)
(c) Chairman, Committee on Bioengineering of the Engineering
Mechanics Division (1976-1981, 1986-1989)
(d) Member, Lifeline Earthquake Engineering Council (1977-1980)
(e) Member, ECPD Visitation Team for Civil Engineering (1975-1981)
(f) Member, ABET Visitation Team for Engineering for
Engineering Mechanics (1981-1984)
(g) Member, Executive Committee, Engineering Mechanics Division (1986-91)
(h) Chair, Executive Committee, Engineering Mechanics Division (1989-1990)
(i) Member, Advisory Board, Engineering Mechanics Division (1991-95)
(j) Chair, Advisory Board, Engineering Mechanics Division (1992-93)

2. Welding Research Council
Subcommittee Member on Tapered Members Committee (1968-present)
Member of Structural Steel Committee (1968-present)

3. Member-at-large, Structural Stability Research Council

4. Member, American Welding Society

5. Member, Chi Epsilon (elected)

6. Member, Tau Beta Pi (elected)

7. Member, American Society for Engineering Education

8. Member, Society of Manufacturing Engineers

9. Member, U.S. National Committee on Biomechanics, (1981-present)

10. Member of Executive Committee (1981-1988)

11. Member, Committee on Earthquake Engineering, National Research Council (1991-1992)

12. Member, Committee on Hazard Mitigation Engineering, National Research Council (1992-1995)