During the early to mid 1950's Mr. Massier analyzed, designed, instrumented, tested, and evaluated performance of various configurations of gas turbine engines and their components at the Boeing Airplane Company in Seattle, Washington. In 1955 he joined the Jet Propulsion Laboratory (JPL), California Institute of Technology, Pasadena, California, where he personally conducted and also supervised research on heat transfer and fluid mechanics of high-temperature gas flows including liquid propellant combustion gases and electric arc heated gases in rocket engines. Careful design, instrumentation, testing and analysis led to new information on acceleration and conditions for "laminarization" of turbulent boundary layer flows as a means of reducing cooling requirements of liquid propellant engines. Experimental investigations of high-temperature gas flow and heat transfer in supersonic diffusers provided the technology for designing greatly simplified test facilities in which altitude operating conditions of rocket engines could be simulated by testing them at ground level. In addition, advances were made in understanding noise generation, emission and suppression that could be applied to aircraft jet engines. Mr. Massier also supervised studies of fire spread in aircraft cabins, managed a task on advanced propulsion concepts with particular interest in eventual application of energy release produced by matter-antimatter annihilation, and contributed to the advancement of knowledge on the hazards of liquid oxygen/liquid hydrogen explosions as related to launch-vehicle lift-off accidents.