Professional Service

Chairman, Scientific Advisory Committee of SAMCOT (Sustainable Arctic Marine and Coastal Technology), Norwegian University of Science and Technology, 2014-present.
Guest Editor, Eng. Fracture Mechanics, Vol. 68, Issues 17-18, December 2001.
Key Reader, Metallurgical and Materials Transactions (1999-).
Chairman, International Workshop on "Ice in Concrete," Thayer School of Engineering, Dartmouth College, December 3-5, 1998.
Director of and lecturer at a Summer Institute on the Behavior of Structural Materials in Nuclear Power Systems, The Thayer School of Engineering, Dartmouth College, July 21-25, 1980
Lecturer at Short Course on Materials in Turbomachinery, CREARE, Inc., Hanover, NH, July 27-31, 1981
Co-organizer (with W. D. Hibler, III) International Conference on the Mechanics and Dynamics of Ice, Thayer School of Engineering, Dartmouth College, August 26-31, 1990
Chairman, Workshop on Physics and Mechanics of Ice, Gallatin Gateway, Montana, Oct. 3-4, 1995.
Member, Board of Visitors, Office of Naval Research, Geo-Acoustics and Arctic Sciences, 25 January 1991
Member, Board of Visitors, Army Research Office, Engineering and Environmental Sciences Division, May 1995; May 1996
Short Course on Ice Mechanics, NORUT Teknologi as, Narvik, Norway, 17-18 November 1993
Reviewer for NSF, ARO, DOE, ONR, NERC (UK), CNRS (France), NRC (Canada)
Reviewer for: Nature, Acta Materialia, Scripta Materialia, Metallurgical Transactions, Philosophical Magazine, Intermetallics, Materials Science and Engineering, Mechanics of Materials, J. Mech. Phys. Solids, J. Materials Research, Materials Science and Engineering, J. Glaciology, Cold Regions Science and Technology, Offshore Mechanics and Arctic Engineering, J. Geophysical Research-Solid Earth, J. Geophysical Research-Oceans, J. International Soc. Offshore Pet. Eng., Engineering Fracture Mechanics, Internat. J. Fracture, Internat. J. Impact Engineering.