4 Mack Ave, South Dennis, MA 02660

Cape Cod Marine Mechanic

On-site Mobile Boat Service

508.241.4220

About Marshall Mobile Marine

Simplifying Boat Ownership Across Cape Cod

About Marshall Mobile Marine

Simplifying Boat Ownership Across Cape Cod


At Marshall Mobile Marine LLC, we bring expert marine service directly to your dock, mooring, or marina - so you can spend less time worrying about maintenance and more time enjoying the water.

Marshall Mobile Marine was established in 2018 by Joshua Marshall. After a decade as an engineer in the oil field, Josh wanted to bring his mechanical knowledge to the home front. We started with basic marine services and small repairs as needed. As the demand increased, so did the operation. In addition to the mobile operation, we have a facility, which is located at 4 Mack Ave South Dennis, by appointment only.

Joshua has been drawn to the ocean since he was a small child. His grandparents would tour Massachusetts Maritime Academy on weekends, little did he know that is where he would go to college. Joshua graduated with a Bachelors in Marine Engineering and obtained his US Coast Guard 3rd Assistant Engineers license. He began his career in the Oil and Gas Industry, which is where he fine tuned his troubleshooting skills with hydraulics and heavy equipment. He finished his career in the oil patch with a Chief Engineers license, then transitioned into a position as a port engineer at the Steamship Authority. While working closely with the mechanics and engineers on the ferries, Josh realized he wanted to bring his mechanical knowledge to his community. Through the years, we have advanced the business to now include a shop and boatyard, with mobile rates available.

Whether it’s a spring commissioning, engine trouble in peak season, or a full repower project, you’ll get honest, reliable service tailored to your boat and schedule.

Our Services Include:
  • Mobile diagnostics & repair
  • Outboard & inboard engine maintenance
  • Seasonal commissioning & winterization
  • Repowers and upgrades
  • Emergency dockside service
  • Bottom Painting
  • Shrink Wrapping
  • Boat Storage & Hauling

We understand that Cape Cod’s boating season is short, and every day on the water counts. That’s why we prioritize prompt service, clear communication, and top-quality workmanship—so you can enjoy peace of mind and a smooth-running vessel all season long.



At Marshall Mobile Marine LLC, we bring expert marine service directly to your dock, mooring, or marina - so you can spend less time worrying about maintenance and more time enjoying the water.

Marshall Mobile Marine was established in 2018 by Joshua Marshall. After a decade as an engineer in the oil field, Josh wanted to bring his mechanical knowledge to the home front. We started with basic marine services and small repairs as needed. As the demand increased, so did the operation. In addition to the mobile operation, we have a facility, which is located at 4 Mack Ave South Dennis, by appointment only.

Joshua has been drawn to the ocean since he was a small child. His grandparents would tour Massachusetts Maritime Academy on weekends, little did he know that is where he would go to college. Joshua graduated with a Bachelors in Marine Engineering and obtained his US Coast Guard 3rd Assistant Engineers license. He began his career in the Oil and Gas Industry, which is where he fine tuned his troubleshooting skills with hydraulics and heavy equipment. He finished his career in the oil patch with a Chief Engineers license, then transitioned into a position as a port engineer at the Steamship Authority. While working closely with the mechanics and engineers on the ferries, Josh realized he wanted to bring his mechanical knowledge to his community. Through the years, we have advanced the business to now include a shop and boatyard, with mobile rates available.

Whether it’s a spring commissioning, engine trouble in peak season, or a full repower project, you’ll get honest, reliable service tailored to your boat and schedule.

Our Services Include:

  • Mobile diagnostics & repair
  • Outboard & inboard engine maintenance
  • Seasonal commissioning & winterization
  • Repowers and upgrades
  • Emergency dockside service
  • Bottom Painting
  • Shrink Wrapping
  • Boat Storage & Hauling

We understand that Cape Cod’s boating season is short, and every day on the water counts. That’s why we prioritize prompt service, clear communication, and top-quality workmanship—so you can enjoy peace of mind and a smooth-running vessel all season long.