Senior/Principal Mechanical Design Engineer

Job Title: Senior/Principal Mechanical Engineer
Location: Cardiff, UK
Salary: £45,000 to £65,000 + Benefits

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About the Company 

A well-established building services consultancy has recently opened a new office in Cardiff. The company is known for delivering high-quality, energy-efficient designs across multiple sectors. They offer full lifecycle support, including feasibility studies, detailed design, construction monitoring, project management, and sustainability advisory. The firm has a strong reputation for staff development and a commitment to low-energy, sustainable building solutions.

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The Opportunity

• Strategic Leadership: Help launch and grow the Cardiff office, build local client relationships, and influence the company’s strategy in Wales
• Career Progression: Supported by an experienced leadership team, with the autonomy to make your mark. There is potential to progress to Associate or other leadership roles
• Project Portfolio: Work across sectors such as education, healthcare, commercial, residential, and specialist projects including laboratories, hotels, and leisure

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Key Responsibilities

• Lead mechanical engineering design and delivery, from feasibility through to project close-out
• Establish and maintain strong relationships with clients, architects, M&E contractors, and other stakeholders
• Mentor junior engineers and support their professional development
• Contribute to energy performance and sustainability goals, including Part L compliance, dynamic simulation, and BREEAM
• Oversee site inspections, CDM compliance, contract administration, cost control, and scheduling

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Essential Skills & Experience

• Chartered Mechanical Engineer or working towards chartership, with strong consultancy experience
• Proven track record delivering projects across sectors such as education, healthcare, labs, and commercial buildings
• Experience in sustainable design, including energy modelling, Part L compliance, and low or zero carbon systems
• Confident in client engagement, project management, and technical leadership
• Experience mentoring or managing junior engineers is desirable

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What’s In It For You?

• Make Your Mark: Be part of a growing office and shape its long-term success
• Career Growth: A clear and supported path to leadership roles such as Associate
• Supportive Environment: Work closely with experienced leaders in a collaborative team
• High Standards: Join a consultancy that values professional development and delivers top-quality, sustainable design

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Apply Now

If you're a motivated Senior or Principal Mechanical Engineer looking for your next step, we’d love to hear from you.