| 1926 | John H. Hammond, Maryland Beta '30 * | internationally famous mining engineer, diplomat, and philanthropist |
| 1930 | Herbert C. Hoover Jr., Kansas Alpha '25 ** | businessman & engineer; selected as first president of Aeronautical Radion Inc. |
| 1960 | C. Stark Draper, Massachusetts Beta '22 | aeronautical engineer; invented gyroscopic apparatus and inertial guidance systems |
| 1960 | Donald A. Glaser, Ohio Alpha '46 | invented the liquid-hydrogen bubble chamber to study atomic particles; won Nobel prize |
| 1960 | Linus C. Pauling, Oregon Alpha '22 | discovered molecular bonding force; won two Nobel prizes |
| 1960 | William B. Shockley, California Beta '32 | co-invented transistor; won Nobel prize |
| 1960 | James A. Van Allen, Iowa Beta '35 | astronomer; discovered (Van Allen) radiation belt |
| 1962 | D. Brainerd Holmes, New York Delta '43 *** | space planner; president of Raytheon Company (1975-86) |
| 1968 | William A. Anders, Ohio Eta '62 | Apollo 8 astronaut; one of first three to circle the moon |
| 1997 | Andrew S. Grove, New York Eta '60 | developed the power and potential of PC microchips |
| 1999 | Jeffrey P. Bezos, New Jersey Delta '86 | entrepreneur and leader in on-line marketing; founder of Amazon.com |