U.S. Consultancy Work (on behalf of Battelle Memorial Institute)

1994 Expert Witness for Dow Chemical Company, Rockwell International Corporation, the Travelers Insurance Company, and the Colorado Division of Labor in the Workers' Compensation case claimed on behalf of William K. Billingsley (Deceased) concerning reconstruction of lung dose in a plutonium worker (and cigarette smoker) from tissue analysis results at autopsy.

1994 Consultant to the Australian Federal Government's Department of Human Services and Health, and invited overseas expert for the Special Workshop on Physical Factors in Radon Progeny Risks, Queensland University of Technology, Brisbane, Australia, November 26, 1994.

1993 Expert Witness for British Nuclear Fuels (BNF) plc in the English High Court Case of Hope and Reay v BNF concerning dosimetry of the paternal testes (in relation to causation of childhood leukemia and dosimetry of the testes in uranium miners exposed to radon, thoron, and their progeny).

1993 Presenter of Summer School on Radiation Protection for the South African Association of Physicists in Medicine and Biology, Bloemfontein, Orange Free State, March 11-12, 1993.

1992 Consultant to the Australian Radiation Protection Society and invited overseas expert for the International Workshop on the Health Effects of Inhaled Radionuclides: Implications for Radiation Protection in Mining, Jabiru, Northern Territory, September 25, 1992.

1990 Member of Expert Panel to Review the Industrial Disease Standards Panel Report on the Ontario Uranium Mining Industry for the Workers' Compensation Board, Ontario, Canada.

1989 Expert Witness for British Nuclear Fuels (BNF) plc in the London High Court Case of Merlin v BNF concerning lung dose from exposure to plutonium in house dust.