Related Clues:

• Boeing worker: Abbr.
• Caltech researcher, perhaps
• R.P.I. grad, perhaps
• Many a NASA worker: Abbr.
• Rd. designer, e.g.
• Casey Jones' occupation, briefly
• Caltech grad
• RR worker
• Ga. Tech grad
• MIT grad, perh.
• MIT deg. holder, perh.
• MIT grad, prob.
• Certain Ga. Tech grad.
• Mech. ___
• Mechanical whiz: Abbr.