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 & 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 & 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.