Mechanical Assembly Engineer in Southampton

We are using and creating technology to transform operations at sea to enable people and the planet to thrive. We are open-minded and fearless in our approach to innovation and don't believe in boundaries. We challenge everything and have massive ambitions to drag aging industries into the tech era. We take safety, equality and education very seriously, and our responsibilities don't stop at our front door. Our business is built on the belief that there's definitely a more environmentally responsible way to operate at sea. We employ people who share our core values. We expect our people to be courageous, trustworthy, and conscientious, driven by a desire to do the right thing. We strive for excellence, work collaboratively, and are genuinely excited by our work. We offer opportunities for our people to develop beyond their role and span a multitude of disciplines. These are open to all, regardless of background and experience level. Working with us means being part of a team that is harnessing technology and creativity to disrupt a traditional industry. We are not your average workplace.

The Mechanical Assembly Engineer plays a critical role in building high‑quality mechanical systems and structures that are ready for seamless integration, test, and deployment. You will take engineering intent — drawings, BOMs, and specifications — and turn it into precise, reliable, right‑first‑time mechanical builds that underpin safe and consistent product delivery. Please note: this is not a design role.

This role combines:

• Hands‑on mechanical assembly (building frames, enclosures, sub‑assemblies, and fitted components to defined standards)
• Cross‑disciplinary integration (working closely with electrical technicians to ensure clean, serviceable, mechanically sound installations)
• Quality‑driven production support (maintaining workmanship standards, identifying issues early, and supporting rework or retrofit activities)

You will ensure that every mechanical build is completed accurately, safely, and consistently — not just assembled, but assembled correctly, with the care and attention that prevents downstream issues and protects delivery performance. This role is ideal for someone who enjoys practical, hands‑on engineering, takes pride in build quality, and thrives in a production environment where precision, teamwork, and methodical execution matter every day.

What you will be doing

• Assemble mechanical structures and sub‑assemblies
• Build frames, enclosures, modules, and mechanical interfaces using engineering drawings, detail views, and BOMs to guide accurate, repeatable assembly
• Fit mechanical components with precision
• Install bearings, shafts, brackets, seals, guards, fasteners, and panels, ensuring correct alignment, torque, and clearances
• Carry out core workshop operations
• Perform drilling, tapping, torquing, alignment, and basic adjustments using hand tools, power tools, and workshop equipment safely and correctly
• Support mechanical–electrical integration
• Work closely with electrical technicians to integrate looms, panels, and equipment, ensuring mechanical interfaces are correct and access for service and test is maintained
• Maintain quality, safety, and compliance
• Build to defined workmanship standards, follow EHS procedures, and identify drawing issues, missing parts, or non‑conformances early
• Support production and delivery activities
• Assist with rework, retrofit, packaging, preparation, and installation tasks, feeding back issues to Manufacturing Engineering to improve designs and instructions

Who you are

• Experienced in mechanical assembly or fitting. You have hands‑on experience building mechanical systems, reading engineering drawings, and working with BOMs and workshop tools
• Detail‑driven and quality‑focused. You take pride in workmanship, follow processes carefully, and understand the impact of precision on downstream integration and test
• Comfortable in production environments. You can work to schedules, adapt to build priorities, and maintain a clean, organised, safe workspace
• A practical, collaborative team member. You work well with electrical, mechanical, and production colleagues, communicate clearly, and take ownership of your build output

Desirable

• Mechanical qualification or apprenticeship (NVQ Level 2/3 or equivalent)
• Experience with low‑volume or bespoke builds transitioning into repeatable production
• Exposure to electrical systems or control builds
• Basic fault‑finding and rework capability

Salary: The salary varies for this position as we are recruiting in multiple regional locations and job grades. The salary process is based on skills, abilities, and experience required.

What you can expect: At Ocean Infinity, we believe in creating equal opportunities for all, celebrating each and everyone’s differences. We are driven by transforming the industry, through our technology, thoughts, behaviours and actions. Being inclusive and respectful to all is fundamental to who we are. It is the right thing to do and enables innovation and creativity to thrive. There is more work to be done, and we know that we aren’t perfect, but our commitment to these values is unwavering. They are central to our mission and the impact we have on the industry, meaning, we cannot live without them.