Custom Build-Upfit Mechanic – Union Grove, WIBuild Specialized Trucks. Develop Your Skills.Custom Truck One Source (CTOS) is seeking a Custom Build-Upfit Mechanic to install, assemble, and modify truck-mounted equipment on commercial vehicles. This role is ideal for mechanics, upfit technicians, fabricators, or diesel technicians who enjoy hands-on work involving hydraulics, electrical systems, fabrication, and custom truck builds.What You'll DoInstall utility equipment, cranes, aerial devices, truck bodies, and accessories.Perform mechanical, hydraulic, electrical, and pneumatic installations.Read wiring diagrams, blueprints, and technical drawings.Install PTOs, pumps, hydraulic systems, lighting, and tool storage solutions.Fabricate brackets and custom components as needed.Troubleshoot installation issues and ensure quality workmanship.What We're Looking ForExperience in truck upfitting, diesel repair, fabrication, heavy equipment, or related trades.Working knowledge of hydraulic, electrical, and mechanical systems.Ability to read schematics and technical manuals.Welding and fabrication experience is a plus.Strong troubleshooting and problem-solving skills.Why Join CTOS?Competitive payMedical, Dental & Vision Insurance401(k) with Company MatchPaid Time Off & HolidaysCareer Growth OpportunitiesWork on unique, custom-built equipment every dayIdeal backgrounds: Truck Equipment Installation, Utility Trucks, Construction Equipment, Diesel Trucks, Mobile Cranes, Hydraulics, Electrical Systems, Fabrication, Welding, and Heavy Equipment Repair.EOE