Principal Mechanical Engineer

JR United Kingdom; Derby; On-site; GBP 50,000 - 80,000; Full time

Job summary

A rapidly growing M&E business based in Edinburgh is seeking Senior and Principal Mechanical Design Engineers for a permanent, full-time role. Successful candidates will lead impactful projects, mentor team members, and enjoy opportunities for clear career progression within a dynamic team. Join a thriving business focused on delivering high-quality design services for landmark projects across the UK and Europe.

Benefits

Opportunity to work on landmark projects

Clear career progression

Leadership development

Join a rapidly growing team

Qualifications

• Experience in mechanical design engineering, particularly HVAC and renewable systems.
• Proven track record in leading projects from concept to completion.
• Ability to mentor and support junior engineers.

Responsibilities

• Design mechanical building services including HVAC and renewable energy systems.
• Lead projects and mentor team members.
• Collaborate with multidisciplinary teams on sustainable solutions.

Skills

Mechanical building services design

HVAC

Renewable energy systems

Team leadership

Job description

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Senior & Principal Mechanical Design Engineers – Edinburgh

A rapidly growing M&E business based in Edinburgh is expanding its mechanical design team. Specialising in data centres, pharma, education, healthcare, and commercial building services, they design HVAC, heat pumps, energy centres, plant rooms, and district heating systems for high-profile clients across the UK and Europe. With headline-making projects such as Centre Parcs resorts, sports stadiums, hotels, and movie studios, this ambitious business is experiencing rapid growth and international expansion, targeting a £400 million turnover by 2030 and looking to double the size of its design team to support this trajectory.

The Senior & Principal Mechanical Design Engineers Opportunity

We are recruiting multiple Mechanical Design Engineers at Senior and Principal levels for a permanent, full-time, office-based role in Edinburgh.

• Senior Engineer: Take ownership of your own projects from concept to completion, providing guidance and technical support to juniors and graduates, while ensuring high-quality design standards.
• Principal Engineer: Lead complex projects with full responsibility, mentor and manage team members across all levels, build strong client relationships, and drive business growth and project success.

Key Responsibilities

• Design and specify mechanical building services including HVAC, heating and cooling, renewable energy systems, plant rooms, and Building Management Systems.
• Produce detailed mechanical designs, layouts, drawings, and reports.
• Collaborate with multidisciplinary teams to deliver compliant, sustainable solutions.
• Support junior engineers and contribute to team growth.

What We Offer

• Principal: Up to £80,000
• Permanent, office-based role in Edinburgh (5 days/week)
• Opportunity to work on landmark projects across the UK and Europe
• Clear career progression and leadership development
• Join a rapidly growing team currently 18 strong, with plans to double
• Be part of an ambitious business driving rapid growth and international expansion