- ENGR
- Cal Tech grad
- Many an MIT grad
- Tsinghua University grad, often: Abbr.
- MIT grad
- 109 Down grad, perhaps
- Bridge designer: Abbr.
- Bridge builder, for one: Abbr.
- Bridge builder: Abbr.
- MIT grad, for ex.
- Hwy. planner
- MIT grad, often
- Rwy. worker
- VIA rail employee (abbr.)
- Art print: abbr.
- B.S. artist, maybe?
- One who may work with foundations: Abbr.
- Certain structural pro: Abbr.
- Designer of locks, briefly
- Job name from the Latin for "cleverness" (not to pat myself on the back): Abbr.
- One may be an expert in traffic: Abbr.
- One may fix flooding issues: Abbr.
- One needed to bridge the gap?: Abbr.
- Georgia Tech grad.
- Georgia Tech grad., perhaps
- Certain Caltech grad
- MIT grad, maybe
- MIT grad, perhaps
- Caltech grad, maybe
- Casey Jones, for one (abbr.)
- Ga. Tech grad
- RR train operator
- Up-front guy for the R.R.?
- Tech sch. grad
- Typical Georgia Tech grad (abbr.)
- Howard Wolowitz of "The Big Bang Theory," by training (abbr.)
- Many a Cal Poly grad (abbr.)
- Rd. designer, e.g.
- Olin grad: Abbr.
- 53 Across grad.
- Cal Poly grad
- Career for a sci. major
- RR employee
- Certain M.I.T. graduate
- Dilbert, for one: Abbr.
- One working on the RR
- RR worker
- Caltech sr.'s goal, often
- Certain B.S. holder
- Certain Caltech grad: Abbr.
- Caltech grad's occ., often
- Former Caltech sr., perhaps
- GM worker
- Caltech grad, perhaps: Abbr.
- Certain tech sch. grad
- Rocket scientist, e.g.: Abbr.
- IBM hire, maybe
- NASA hire
- Certain RPI grad
- Caltech grad, often: Abbr.
- Software pro, in want ads
- Elec. or mech. expert
- Many an MIT alum
- Many an RPI grad
- Tech sch. alumnus
- RR driver
- MIT grad: Abbr.
- Bridge bldr.
- RR operator
- Train operator: Abbr.
- MIT graduate, perhaps
- NASA employee, perhaps
- One with a degree from a technical inst., perhaps
- RPI grad, perhaps
- IBM employee, maybe
- Many a Caltech grad
- Professional status of Herbert Hoover: Abbr.
- Construction expert: Abbr.
- Holder of B. C. E.
- Railroad man: Abbr.
- MIT graduate.
- Construction man: Abbr.
- Machinist: Abbr.
- Man at the throttle: Abbr.
- Man from M.I.T.
- Art process: Abbr.
- Tech grad: Abbr.
- Tech graduate: Abbr.
- Tech grad.
- A Northeastern U. grad
- Grad. of R.P.I.
- B.&O. man
- Employee on a RR
- Part of E.E.
- Locomotive dvr.
- Head of a train: Abbr.
- Many a graduate of 37-Across: Abbr.
- Technician: Abbr.
- M.T.A. employee
- Caltech grad: Abbr.
- Bldg. contractor's hire
- Techie: Abbr.
- Bridge builder, e.g.: Abbr.
- Many an M.I.T. grad: Abbr.
- Bldg. planner
- Hwy. dept. employee
- Many a NASA employee: Abbr.
- Boeing worker: Abbr.
- G.E. employee
- Many a NASA worker: Abbr.
- Bridge or tunnel designer: Abbr.
- Mech. ___
- Mechanical whiz: Abbr.
- Mech. expert
- Mech. master
- Many a Lockheed Martin employee: Abbr.
- Mech. whiz
- 56-Down grad: Abbr.
- Applied sci. professional
- Road designer, e.g.: Abbr.
- M.I.T. grad, often: Abbr.
- Dam designer: Abbr.
- App creator, perhaps: Abbr.
- Many a Silicon Valley worker: Abbr.
- One who pulls a train whistle: Abbr.
- Many a SpaceX worker: Abbr.
- One practicing the "E" of STEM subjects: Abbr.
- Certain B.S. holder: Abbr.
- Part of STEM: Abbr.
- Profession for many an M.I.T. grad: Abbr.
- Many an M.I.T. graduate: Abbr.
- Many a Caltech student
- MIT major, often
- Caltech major: abbr.
- MIT degree
- Casey Jones, e.g. (Abbr.)
- Civil or elec. expert
- Could be chem. or mech.
- Abbr. for a MIT grad
- Certain MIT grad.
- One who may be civil or mech.
- Tech. dept. in a university
- Word with civil or elec.
- Mechanical one (Abbr.)
- Tech sch. grad, perhaps
- An MIT grad, perhaps
- Ga. Tech grad, perhaps
- Casey Jones' occupation, briefly
- Certain Ga. Tech grad.
- Army Corps tech.
- Mechanical or electrical pro
- Tech school grad
- Caltech grad, perhaps
- Abbr. for an MIT grad
- Certain Georgia Tech grad
- An MIT grad.
- BCE grad
- Tech. college major
- NASA employee
- Abbr. for an MIT grad, perhaps
- One with a degree from a technical inst., often
- Civil employee?
- Certain Caltech grad, briefly
- MIT major, often (Abbr.)
- RR VIP
- Casey Jones' was one (Abbr.)
- Mechanically inclined one (Abbr.)
- Dept. in many universities
- Casey Jones's occ.
- MIT grad, for short
- NASA staffer
- Many a tech. sch. grad
- Applied science pro: Abbr.
- MIT major
