The manuscript describes Grondahl's education at Concordia and St. Olaf Colleges; his interests in science; his study of chemistry and physics and enrollment at Johns Hopkins University; marriage; appointment first to Spokane College staff then to University of Washington; work at the Carnegie Institution of Washington; tenure as Union Switch and Signal Co. director; his research in rectifier theory; work for National Defense Research Committee and Office of Scientific Research and Development on high-angle dirigible bombs; consultantships; and association memberships and honors.