Principal Mechanical Engineer

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

Job summary

A rapidly growing M&E business in Edinburgh seeks Senior and Principal Mechanical Design Engineers for permanent roles. Responsibilities include leading projects, mentoring junior staff, and designing mechanical services for high-profile clients. The positions offer a competitive salary and career progression opportunities within a dynamic team.

Benefits

Clear career progression

Leadership development

Opportunity to work on landmark projects

Qualifications

• Experience in mechanical building services design.
• Proven ability to lead projects from concept to completion.
• Technical mentorship experience.

Responsibilities

• Design and specify mechanical building services, including HVAC and renewable energy systems.
• Produce detailed designs and collaborate with multidisciplinary teams.
• Support team growth by mentoring junior engineers.

Skills

Mechanical Design

Project Management

HVAC Systems

Renewable Energy Systems

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