The story
Terry Nelson is a highly skilled systems and controls specialist with an elite background in advanced industrial automation, high-pressure hydraulics, and commercial field service.
Before launching Terry's Mobile Repairs, Terry spent over a decade resolving complex mechanical, electrical, and reliability issues in high-demand industrial environments. His experience spans performing precision field service on Milacron plastic injection molding machinery, executing sub-contract mobile technical support for The Rotex Group (servicing specialized Gradex chip classifiers and S2000 particle systems), and engineering electrical and mechanical fixes for Applied Materials semiconductor fabrication tools.
Certified as an Advanced PLC Technician, Terry specializes in troubleshooting complex 24VDC to 480VAC control circuits (including Allen Bradley RS Logix/Studio 5000 environments), industrial pneumatic systems, and high-pressure hydraulic systems and directional control valves. Having previously built and wired custom commercial utility trucks for Altec Inc., he brings an unmatched, engineering-level precision directly to the roadside, the construction lot, the farm field, or your home driveway.
When a truck or piece of heavy equipment goes down, the work starts with a diagnosis. The repair is completed correctly the first time, so the machine returns to service with as little lost time as possible.
Professional timeline
Field Service Engineer & Mobile Specialist
Current roles
Milacron / The Rotex Group (Sub-Contract)
Travel on-location to customer facilities to provide technical service, electrical troubleshooting, and mechanical repairs. Deliver precision field solutions for Milacron custom plastic injection mold machinery, automated Gradex chip classifiers, and high-precision Rotex S2000 particle separator systems.
Customer Engineer
Core industrial experience
Applied Materials (Manassas, VA)
Traveled directly to customer fabrication sites to execute preventative maintenance, low- and high-voltage electrical diagnostics (24 VDC to 480 VAC), and mechanical repairs on semiconductor etching tools. Handled ultra-high vacuum troubleshooting using helium leak checking, radio-frequency generator tuning, and 3-axis magnetically and belt-driven Yaskawa robotics. Served as assistant site Safety Champion.
Lead Maintenance Technician
Core industrial experience
True Velocity (Garland, TX)
Supervised multi-technician teams maintaining custom polymer automation cells. Managed multi-unit 60 hp Kaeser industrial air compressors, compressed-air dryers, thermal water control units, and positional adjustments on Fanuc robotics. Milled custom replacement components on a Bridgeport mill to tolerances of plus or minus one thousandth of an inch.
Lead Plant Engineering Specialist & Project Lead
Core industrial experience
Oldcastle Building Envelope (Terrell, TX)
Directed a team of 11 industrial technicians managing scheduled plant-wide maintenance and emergency downtime troubleshooting. Diagnosed three-phase motors, contactors, transformers, and servo encoders. Updated, modified, and debugged safety features and operational code inside Allen-Bradley PLC programs to extend system life.
Industrial Maintenance Technician
Foundational experience
Western Extrusions Corp (Carrollton, TX)
Maintained aluminum extrusion equipment, including log and billet furnaces, aging and homogenizing ovens, pullers, stretchers, conveyors, and overhead cranes. Diagnosed electrical faults from 24 VDC to 480 VAC along with the mechanical, pneumatic, and hydraulic side of the same lines. Replaced Allen-Bradley and Siemens drives, I/O, encoders, and network components, and rebuilt furnace equipment so it held process temperature.
Low-Voltage Electrician
Foundational experience
Altec Inc. (Daleville, VA)
Built and wired custom commercial utility trucks. Installed and tested hydraulic PTO pumps, manifold blocks, and directional control valves to customer specification, and documented the harness layouts so each truck was finished the same way.
Flood-Recovery & Electrical Refurbishment Technician
Foundational experience
East Coast Autosource
Executed complete mechanical and electrical overhauls on vehicles compromised by severe flood damage. Specialised in diagnosing complex wiring harnesses, replacing and re-coding water-damaged Electronic Control Units (ECUs), mitigating electrical corrosion, and performing deep component troubleshooting to safely return vehicles to factory service standards.
Advanced Diagnostic & Drivetrain Technician
Foundational experience
Bass Transmissions
Specialized in the diagnostics, overhaul, and repair of complex automotive powertrains, with a primary focus on automatic and manual transmissions. Managed precision rebuilds of internal gear assemblies and hydraulic valve bodies. Diagnosed and resolved critical performance issues within engines, differentials, and transfer cases to ensure optimal power delivery and durability.