Mechanical assembler Jobs in St. Catharines, ON

Position Title: Mechanical Fitter(Tail-End)

Location: St. Catharines, ON – Port Weller

Job Type: Full-time, Permanent

Compensation: $35 – $40 per hour, based on experience

About Ontario Shipyards

Ontario Shipyards operates two premier marine facilities on Lake Ontario: our main fabrication hub in Hamilton and the historic Port Weller Dry Docks on the Welland Canal in St. Catharines. Together, we form the largest Canadian-owned ship repair and refit operation on the Great Lakes. As a trusted partner to the Canadian Coast Guard and major commercial fleets, our combined yards deliver everything from advanced manufacturing to massive vessel life extensions.

The company is embarking on an unprecedented period of growth driven by the opportunities created by Canada’s National Shipbuilding Strategy. At the same time, the company is executing the Ontario Shipyard Modernization Project (OSMP) which is a multi-million-dollar initiative that is revolutionizing shipyard operations in Ontario and ultimately Canada. Our team takes immense pride in keeping the Great Lakes fleet moving, building and maintaining the giant vessels that drive Canada's economy – where water meets mettle.

Position Summary

Reporting to the Mechanical Supervisor and working with/under FSRs (Field Service Representatives) of various supply and manufacturer companies, the Mechanical Fitter will disassemble, clean, inspect, repair, and reassemble mechanical components on ships, including tail shafts, propellers, rudders, steering systems, bearings, pumps, motors, sea valves, windlasses, davits, cranes, bow/stern thrusters, and other mechanical components. Responsibilities include reading blueprints, precisely fitting parts to ensure proper functionality and compliance with engineering specifications. The Mechanical Fitter will ensure the mechanical systems of the ship operate efficiently and reliably, acting as a skilled mechanic in maintaining optimal ship performance.

Key Responsibilities

• Conduct pre-use inspections of tools and equipment to ensure they are in safe working condition.
• Conduct daily field level risk assessments to identify safety hazards on job sites.
• Mechanically fit and install marine hydraulic and pneumatic cylinders, pumps, hoses, engines, gearboxes, generators, bilge pumps, valves, lazy rods, and other mechanical components.
• Service and maintain propulsion systems, steering systems, tail shafts, propellers, rudders, bearings, and deck machinery.
• Conduct hydrostatic/pressure tests of tanks and other components.
• Clean, inspect, organize, and track parts per task numbers.
• Read and interpret mechanical drawings, blueprints, technical manuals, and equipment specifications.
• Demonstrate flexibility to meet deadlines, proactively identifying and addressing potential delays while communicating concerns and proposing solutions to management.
• Collaborate with and assist colleagues to support daily operational needs.
• Maintain a clean, organized, and safe work area.
• Perform other duties as assigned or required to support operations.

Qualifications & Experience

• Safety-first mindset and commitment to following safe work practices.
• High School Diploma, Grade 12, or equivalent.
• Completion of a recognized Mechanical/Millwright, Marine Mechanical, Marine Engineering, or related skilled-trades program.
• Valid Ontario 433A Certificate of Qualification and/or Red Seal endorsement is a strong asset.
• 3–4 years of hands-on mechanical fitting, millwright, mechanical maintenance, or related industrial experience.
• Previous experience in ship repair, marine maintenance, propulsion systems, or shipyard operations.
• Working knowledge of rigging practices, including safe movement of heavy components, use of chain falls, slings and shackles, and understanding of crane signals and rigging terminology.
• Welding and oxy/acetylene cutting competency is an asset.
• Demonstrate the ability to work independently and collaboratively within a team environment.
• Demonstrate strong attention to detail and the ability to follow instructions precisely.
• Must have adequate physical fitness to fulfill demanding tasks with a willingness to work in various weather conditions year-round.

What We Offer

• Competitive compensation based on skills and experience
• Comprehensive health benefits including health, dental, vision, life and disability coverage for you and your dependents
• RRSP matching program and Health Spending Account (HSA)
• Paid vacation time and statutory holidays
• Discounts on safety boots and safety glasses
• Opportunities for professional development and specialized shipyard training
• On-site parking

This job posting is for an active vacancy. Every application is reviewed individually by a member of our recruitment team. We do not use AI or automated computer systems to screen, assess, or select applicants for this position.

Ontario Shipyards is an equal opportunity employer and is committed to fostering an inclusive and accessible workplace. We prohibit discrimination and are committed to providing equal employment opportunities in accordance with the Ontario Human Rights Code. We will provide reasonable accommodation to applicants with disabilities throughout the recruitment and selection process, in accordance with the Accessibility for Ontarians with Disabilities Act (AODA). If you require accommodation during the recruitment process, please notify Human Resources, and we will work with you to meet your accessibility needs.