This interview describes Fraser's work as an engineer and instrumentation specialist at the Department of Terrestrial Magnetism (DTM) during WWII, and then more significantly, at Applied Physics Laboratory (APL) following World War II. His work at DTM was on proximity fuse research. He tranferred from DTM to APL during the war and concentrated on radar research and control systems for guided missiles. After the war, he participated in the used of V-2s for upper atmostphere research with James Van Allen's High Altitude Group, developing instrumentation for telemtetry and cosmic ray research. Other affiliations and contacts discussed include: Luis Alvarez, William Fowler, Allen Hynek, Richard Roberts, Philip Rudnick, Robert Shankland, Merle Tuve, James Van Allen, John Victoreen and the Victoreen Instrument Company, White Sands Missile Range. Topics discussed include metallurgy, nuclear fission, proximity fuzes, rocket development and radio transmission.