Principal Mechanical Design Engineer

Job description

Principal Mechanical Design Engineer

Water Treatment Projects | Major Engineering Contractor

Manchester-Based | Hybrid & Flexible Working

We’re working with a leading engineering contractor delivering a significant portfolio of water and wastewater treatment projects, and they’re now looking to appoint a Principal Mechanical Design Engineer to strengthen their technical capability in the North West.

This is a senior technical role, based out of the Manchester office, with flexible hybrid working. The position plays a key part in leading mechanical design delivery across complex utility projects, while also providing technical leadership and mentorship within the wider engineering team.

The role

• Lead mechanical design on water and wastewater treatment projects from feasibility through to detailed design and construction support
• Take technical ownership of mechanical solutions, ensuring designs are safe, compliant and buildable
• Provide oversight, guidance and mentoring to senior and intermediate mechanical engineers
• Work closely with civil, electrical, process and commissioning teams to deliver fully integrated designs
• Engage with project managers, construction teams and the client to support successful project delivery
• Contribute to technical standards, best practice and continuous improvement across the framework

What we’re looking for

• Proven experience in a Principal or Senior Mechanical Design Engineer role
• Strong background delivering water or wastewater treatment projects within the utilities sector
• Experience working for a contractor or consultancy involved in utility infrastructure
• Ideally Chartered Engineer status (CEng) or actively working towards it
• Solid understanding of mechanical equipment, installation practices and operational requirements on treatment works

What’s on offer

• Senior technical role within a large, well-established contractor
• Long-term programme of work across major water treatment projects
• Manchester base with flexible hybrid working
• Competitive salary and benefits package, reflecting seniority and responsibility

This is an excellent opportunity for a Principal Mechanical Engineer looking to take on a technically influential role within the water sector, with long-term stability and progression.

Extra information

Status

Open

Education Level

Secondary School

Location

Manchester

Type of Contract

Full-time jobs

Published at

09-02-2026

Profession type

Manufacturing / Industrial

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English