Senior / Principal Mechanical Design Engineer

Senior / Principal Mechanical Engineer

Location: Bristol
Discipline: Mechanical Building Services
An exciting opportunity has arisen for an experienced Mechanical Engineer to join a growing multi-disciplinary building services team. You’ll be part of a dynamic and innovative group delivering projects from early-stage strategy and concept design through to detailed design, construction and post-completion evaluation.
This role is ideal for a Senior Engineer ready to step up, or an established Principal Engineer seeking more autonomy, leadership and influence in project delivery and team development.

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What You’ll Be Doing

- Lead the design and delivery of mechanical building services systems, including calculations, schematics, specifications, models, equipment schedules and technical documentation.
- Oversee projects from concept to completion, ensuring technical excellence, innovation and compliance with relevant regulations and standards.
- Attend and lead design team meetings with clients, contractors and stakeholders – acting as a trusted technical advisor.
- Develop strong working relationships with clients and multidisciplinary teams.
- Mentor and support junior engineers, contributing to their professional growth and development.
- Contribute to project planning, resource allocation and delivery programmes to ensure high-quality outcomes on time and within budget.
- Engage in continuous professional development and stay informed on emerging technologies, low-carbon solutions and industry best practice.
- Support business activities such as project reviews, proposals, bid preparation or client development (for Principal-level responsibilities).

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What We’re Looking For

Essential

- Degree qualified in Mechanical or Building Services Engineering.
- Chartered Engineer (CEng) or working towards Chartership with a clear plan to achieve it.
- Proven experience designing and delivering mechanical building services systems.
- Strong understanding and application of low-carbon, sustainable design principles.
- Ability to communicate technical concepts clearly using various media – drawings, reports, presentations and digital models.
- Strong leadership, interpersonal and collaboration skills; able to work independently and as part of a team.
- Able to manage workload, meet deadlines and thrive under pressure.
- Fluent in written and spoken English and eligible to work in the UK.

Desirable

- Experience in sectors such as residential, commercial, education, healthcare, secure environments, leisure or critical systems.
- Project management, commercial awareness and programme delivery skills.
- Experience with client-facing work, business development, bid writing or tender processes.
- Professional network within the building services/engineering community.

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Software and Technical Tools

Experience with some or all of the following is beneficial:

- Amtech Prodesign
- IES VE
- Dialux / Relux / Radiance
- Revit / AutoCAD / Navisworks
- SketchUp
- Microsoft Office Suite and Microsoft Project

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Why Join£

- Work within a forward-thinking team passionate about engineering excellence and innovation.
- Opportunity to influence complex projects and shape design outcomes across multiple sectors.
- Clear progression pathways – from Senior to Principal and beyond.
- Supportive environment that encourages CPD, Chartership and technical development.