Heavy diesel mechanic based in Toowoomba since 2005

Toowoomba Heavy Diesel is a locally owned and operated heavy vehicle and machinery workshop located in Harristown. Our goal is to keep your vehicles running and at their full, operational capacity. We cater to clients in the mining, earthmoving, automotive, transport, industrial and agricultural sectors.

Established in 2005 by director Ross Martyr, we offer onsite heavy mechanical diagnostics, maintenance, repair, servicing & maintenance monitoring. Additionally, we can come to your worksite with a mobile service truck and offer these services. Our team has the experience to facilitate large vehicles and heavy machinery. Based in Harristown, we have clients across the Darling Downs and beyond.

Flexibility is our strong point. We tailor our mechanical solutions to deliver a competitive customer service experience. When your machinery and equipment is broken or malfunctioning, we strive to get you back into service in a reasonable & efficient manner. We integrate our maintenance solutions to best suit your workloads, schedules, shifts and seasons.

Get in touch with the Toowoomba Heavy Diesel team today and chat to our diesel mechanics about maintenance services for your equipment today.

White Truck Seen On Side Mirror - Diesel Mechanic in Harristown, QLD

Our Staff

Ross Martyr

Ross is the sole director of the business with more than 31 years’ experience in the heavy automotive, transport, mining, agricultural and industrial sectors. Completing his trade in Roma, Ross was exposed to a broad range of machinery given the surrounding industries. He gained a solid foundation on which to build his mechanical career. During his 31 years, Ross has worked for a range of heavy equipment repair companies, honing his skills and knowledge.

Jerome Head

Jerome completed his apprenticeship with us, he comes from the Chinchilla farming community. With him he brings a strong understanding of the requirements to maintain, service & repair vehicles & equipment. He completed high school at Grammar in Toowoomba, has been with the company 5 years and is a strong member of our team.

Sam Elmes

Sam was an Augathella local, but his family have moved into the Darling Downs region. Sam graduated year 12 at Toowoomba Grammar school and is now in his second year of his heavy vehicle trade (HCV). Sam brings a positive & hard-working package to the team & business, and we look forward to him continuing to grow and learn in the heavy equipment field.

Juston Free

Juston comes to us from Clifton in a farming background. He graduated year 12 at Grammar Toowoomba & has already completed a light vehicle automotive trade. He is now completing a Mobile plant apprenticeship with us. Juston is keen, hardworking and brings a fresh mind & positive attitude to the business & team.

Jack Wild

Jack has moved in from Inglewood, is an ex builder and is looking to expand his skill set. Originating from a farming family in the Dalby region Jack offers a positive attitude, a view to learn the trade & broaden his mechanical skills. Prior to commencing work with THD Jack was employed by West Haulage & Harvesting Pty Ltd in Inglewood in their workshop as mechanic & operator.