Senior / Principal Mechanical Design Engineer

Pertemps; Bristol; On-site; GBP 100,000 - 125,000; Full time

Job summary

A growing multi-disciplinary engineering firm in Bristol seeks a Senior/Principal Mechanical Engineer to lead the design and delivery of mechanical building services systems. This role offers opportunities for professional growth and project leadership in a collaborative environment focused on innovation and engineering excellence.

Benefits

Opportunity for career progression

Support for professional development

Dynamic and innovative work environment

Qualifications

• Degree qualified in Mechanical or Building Services Engineering.
• Chartered Engineer (CEng) or working towards Chartership.
• Proven experience designing and delivering mechanical building services systems.
• Fluent in written and spoken English.

Responsibilities

• Lead the design and delivery of mechanical building services systems.
• Oversee projects from concept to completion.
• Mentor and support junior engineers.
• Engage in continuous professional development.

Skills

Mechanical Engineering

Building Services Design

Project Management

Leadership

Communication Skills

Education

Degree in Mechanical or Building Services Engineering

Chartered Engineer or working towards Chartership

Tools

Revit

AutoCAD

Microsoft Office Suite

Job description

Overview

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.

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).

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.

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

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.