Chairman, Engineering Division of the International Society for Risk Analysis.

Board Member, International Association of Probabilistic Safety Assessment and Management.

Member, Board of Editors, Journal of Reliability Engineering and System Safety.

Member, and Program Chairman of the Executive Committee of the Human Factors Division, American Nuclear Society.

Co-Director, Center for Technology Risk Studies, Clark School of Engineering, University of Maryland at College Park.

Member, Risk Analysis Methodology Committee, International Society for Risk Analysis.

Director, X-Ware Systems Reliability Analysis Laboratory (Focusing on reliability of integrated hardware-software-human systems.)