Civil engineer, businessman, and leader in the geotechnical engineering profession; in 1954, with Stan Wilson, a Harvard colleague, formed Shannon and Wilson Inc., a Seattle engineering firm which focused on designing building foundations and earthen dams, geotechnical consulting, and earthquake engineering; worked on projects all over the world, including Alaska, Korea, Borneo, Portugal, Australia, and Vietnam; in 1969, became the founding president of the Associated Soil and Foundation Engineers, a professional group dedicated to the control and reduction of liability claims; was a founding member of Terra Insurance, a group formed to provide professional liability insurance for the engineering community; worked for the Army Corps of Engineers at various locations; during WWII, worked on projects to enhance national security including designing military runways in the Azores and gun emplacements on the Eastern seaboard; taught at Harvard for one year.