About Grey Iron Engineering
Heavy equipment, workshop service, and fleet support for civil and infrastructure work.
Keep equipment working.
Since 2004, Grey Iron Engineering has grown from a hydraulic overhaul shop into a heavy equipment contractor. Today we operate 240+ Heavy Units and support civil, quarry, and infrastructure projects across North America.
Our Houston facility includes dynamometer cells, 10,000 PSI hydraulic test benches, and mobile service trucks. This keeps repairs, testing, and field support in one place.
Six operating principles
Reliable machines, clear planning, and safe field work.
Mechanical Reliability
Powertrains and hydraulic components are checked before dispatch.
OSHA & MSHA Safety
Pre-shift checks and documented OSHA and MSHA procedures.
48-Hour Rapid Dispatch
Heavy-haul logistics and oversize permits for fast deployment.
3D Machine Control
GPS and 3D guidance for accurate grading and earthwork.
SOS Fluid Diagnostics
Oil sampling helps identify wear before parts fail.
Master Rigging Rigor
Lift plans, ground studies, and qualified crane crews.
Operations leadership
The people responsible for fleet, field, and workshop operations.
David Vance, P.E.
"Good field work starts with equipment that is ready to work."
With more than 22 years directing heavy machinery deployment, open-pit earthworks, and specialized hydraulic engineering programs across North America, David Vance oversees Grey Iron Engineering. His focus centers on rapid equipment mobilization, rigorous preventive maintenance, and zero lost-time jobsite safety.
Sarah Sterling, P.E.
"Precision lift calculations and real-time ground-bearing studies transform massive critical picks into repeatable engineering procedures."
Directing high-capacity mobile crane deployments, 3D lift simulation plans, and 24/7 mobile field service trucks ensuring continuous uptime across all regional projects.
Need equipment for a project?
Check availability, mobilization timing, and service options with our team.