Within 250 Miles of Houston, TX
Within 250 miles of San Antonio, TX
Within 250 Miles of Houston, TX
Within 250 miles of San Antonio, TX
Since 2014, OnSite Diesel has been a trusted partner for contractors, fleet managers, and industrial operations across Texas. We provide reliable heavy equipment repair, heavy equipment maintenance, mobile field service, and full-service shop repairs.
Our skilled technicians bring the expertise needed to handle complex repairs and on-site support, and today we operate from a modern facility with a full fleet of service trucks serving customers within a 250-mile radius of Houston.
Founded in 2014 as a family-owned operation with one service truck and a small shop, OnSite Diesel grew steadily through hard work, integrity, and a deep understanding of heavy equipment. Over the past decade, we expanded into a modern facility with a full fleet of service trucks and a team skilled in diesel engines, welding, hydraulics, machining, and heavy equipment maintenance. Today, our reputation is built on minimizing downtime and solving complex mechanical challenges for customers across Texas.
In 2025, OnSite Diesel joined the DEUTZ Corporation family, a global leader with more than 160 years of engineering innovation in diesel, gas, and electric power systems. This partnership expands our resources and technical capabilities while preserving the team, service quality, and customer-first approach that define who we are. With DEUTZ’s nationwide support behind us, we can deliver even more reliable service and long-term value to the contractors, fleet managers, and industrial operators who depend on us.
At OnSite Diesel, our customers value our workmanship, responsiveness, and commitment to doing the job right the first time, and we take pride in the strengths that support that work.
Our team is trained in diesel diagnostics, hydraulics, structural welding, line boring, and heavy machinery repair. We invest in ongoing training and advanced software so we’re prepared for whatever your equipment needs.
From emergency field repairs to complete overhauls in our Willis, TX shop, we handle both urgent and complex work to minimize downtime and help your fleet operate at peak performance.
We maintain full insurance coverage and hold industry-recognized certifications that qualify our technicians to work in regulated and secure environments.
Our Transportation Worker Identification Credential (TWIC) certification allows our team to access secure maritime facilities and restricted areas, ensuring we can safely and legally service equipment in ports and similar environments.
With MSHA certification, our technicians are trained to work safely in mining environments and support operators with compliant, high-quality heavy equipment service.
