Episode Highlights
What if your dealership’s biggest hidden opportunity isn’t new software or marketing, but the technician already on your team who wants more than just the next repair order? In a tight labor market, shops keep hiring but forget to mentor, which slows profitability, burns out good techs, and leaves customers underserved.
In this episode of Heavy Hitters, Jay Lucas sits down with Marshall Sheldon, a 18-year veteran diesel technician with approximately 90 Cummins certifications and a track record that redefines what’s possible in service operations. Marshall’s journey from washing trucks at Dixon Brothers to becoming a master technician, mentor, and business builder is anything but conventional. Drawing from his Marine Corps discipline, the mentorship of a Snap-on rep who cosigned his first tool box, and a relentless hunger to understand not just how things break but how businesses work, Marshall reveals the system he’s perfected: getting apprentices profitable in 90 days, growing a single customer account from $0 to $850,000 in 12 months, and driving over 300% departmental growth in just 3 years.
With raw honesty, battlefield stories from the shop floor, and contrarian takes on everything from service writers to embedded technician models, Marshall and Jay explore what it really takes to build a culture where technicians own their outcomes, customers become partners, and work becomes worship. The conversation ties back to self-reflection, intentional relationship-building, and the power of surrounding yourself with people who stretch you, whether that’s a “Sweaty Leaders” mastermind group or the random Snap-on rep who saw potential in a kid with no credit.
Our Guest
Marshall Sheldon is a master diesel technician with 18 years of experience and over 90 Cummins engine certifications. A Marine Corps veteran, Marshall began his career washing trucks at a Wyoming fleet and rose to become one of the most certified and respected technicians in the industry. He has developed a revolutionary 90-day apprenticeship program that produces profitable technicians in record time, grown customer accounts from zero to nearly a million dollars, and helped drive over 300% departmental growth. Marshall is a passionate advocate for technician development, financial literacy in the trades, and the power of self-managed teams. He is active on LinkedIn, where he shares insights on mentorship, leadership, and the future of the diesel industry.
