- Caterpillar, Inc. (Green Valley, AZ)
- …Caterpillar's Tucson Proving Ground (https://www.youtube.com/watch?v=9Vx5xYyA0n0) ! As a **Senior Test/ Validation Engineer** , you'll have the opportunity to test ... machine systems and subsystems including structural, mechanical, hydraulic, cooling, engine , powertrain, electrical, electronics, and software. + Use engineering… more