Fleet maintenance often starts simple: a service truck, a few tools, and a focus on getting vehicles back on the road quickly.

For many operations, that mobile-first approach works — at least early on. Most routine jobs can be handled roadside or at a customer’s yard, keeping costs down and response times fast. But growth has a way of exposing limits.

Tom Sessoms, president of Ardamas Fleet Services, has seen that transition first-hand. After years working in diagnostics and shop consulting roles with Robert Bosch, he now runs a commercial repair business supporting Classes 4-8 equipment with a mix of mobile service and shop-based work.

His takeaway is straightforward: mobile service builds the business, but a shop is what sustains it.

Where mobile works, and where it doesn’t

Sessoms estimates 80-85% of repair work can be handled on-site. That includes inspections, minor repairs, and diagnostics — the bread-and-butter jobs that build customer relationships.

But the remaining 15-20% is where things get complicated. Some repairs require space, specialized tools, or deeper diagnostics that simply can’t be done in a parking lot. When those jobs are outsourced, fleets lose margin and control over quality.

That’s typically the tipping point.

“A shop lets you handle the tough jobs yourself,” Sessoms says. “You control the work, the standard, and the result.”

Building a hybrid model

As operations grow, the structure tends to evolve into a hybrid model:

• Mobile trucks handle quick-turn and on-site work
• A support vehicle moves parts and assists technicians
• A shop takes on heavy repairs and complex diagnostics

It’s not just about adding capacity, it’s about tightening control over the entire workflow.

That control becomes critical as fleets take on more demanding customers or expand into specialized work such as liftgates, forklifts, or cranes.

Growth brings harder decisions

Scaling a service operation isn’t just about equipment. It’s about people, and that’s often where things get uncomfortable. Not every technician fits the next stage of growth. Holding onto the wrong people can slow the business and impact quality. Hiring isn’t any easier.

Finding skilled technicians remains one of the biggest challenges in the industry, forcing operators to look beyond their immediate market or invest more heavily in workplace conditions and culture.

A clean, organized shop and professional setup can make a difference — not just for customers, but for attracting and retaining talent.

Not every customer is worth it

Another lesson that tends to come with growth: selectivity matters.

Chasing every job or every fleet can quickly erode margins and stretch resources too thin. Operators need to understand their capacity and be willing to walk away when the numbers don’t work.

Warning signs include:

• Pressure to lower hourly rates
• Poor payment terms
• Jobs that consume time without delivering returns

The operators that scale successfully are usually the ones willing to say no.

Pricing, process, and performance

Competing on price alone is a race to the bottom. Sessoms argues the focus should shift to value, particularly when offering services like multi-brand diagnostics or mobile repairs that reduce downtime for customers.

Process also plays a bigger role as operations grow. Quick inspections, fast estimates, and efficient parts management can make the difference between a productive shop and one where work stalls.

Some operators are also leaning on simple KPIs to keep teams aligned: job margins; billable hours; overall output. Nothing overly complex, just enough visibility to spot issues early and keep performance on track.

The mindset shift

At a certain point, technical skill alone isn’t enough. Operators who stay stuck in day-to-day wrench-turning tend to hit a ceiling. Growth requires a shift toward managing people, systems, and long-term decisions.

That transition isn’t always comfortable, but it’s often what separates a small operation from one that can scale.

Mobile service is a strong starting point, and for many fleets, it remains a critical part of the business. But as complexity grows, so does the need for a controlled environment.

A shop doesn’t replace mobile service. It complements it. And for operators looking to scale, that combination is often what turns a steady business into a sustainable one.