Senior Mechanical Engineer

Box Twenty; England; Hybrid; GBP 40,000 - 50,000; Full time

Job summary

A growing engineering consultancy in Bristol seeks a Senior Mechanical Engineer to lead design processes and mentor junior engineers. You will work on diverse projects, focusing on sustainable design solutions. Ideal candidates should have experience in mechanical services design, strong leadership skills, and proficiency with design tools like Revit and AutoCAD. The role offers hybrid working options and career development support. Join a collaborative team where your contributions will be valued.

Benefits

Hybrid working options

Ongoing support towards Chartership

A friendly, no-ego team

Opportunity to work on sustainable projects

Qualifications

• Chartered or actively working towards it.
• Solid experience in mechanical building services design.
• Understands sustainable, low-carbon design approaches.
• Enjoys working collaboratively but can also lead independently.
• Communicates clearly and professionally with clients and teams.
• Is fluent in English and eligible to work in the UK.

Responsibilities

• Lead mechanical building services design on multiple projects.
• Produce high-quality design documents.
• Represent the business in client meetings.
• Provide support and mentorship to junior colleagues.
• Keep on top of design standards and regulations.
• Plan and manage work to meet deadlines.

Skills

Mechanical building services design

Low-carbon design approaches

Collaboration

Communication

Revit

IES

Amtech

AutoCAD

Education

Chartered engineer or working towards chartership

Tools

Revit

IES

Amtech

AutoCAD

Job description

Senior Mechanical Engineer GBP 40,000 GBP 50,000, depending on experience + Benefits – Bristol

Ready to step into a senior role where your ideas matter, your growth is supported, and your work has real impact?

At Box Twenty Consulting Engineers, we give you more than just a job title. You'll have the chance to lead meaningful building services projects, guide a talented team, and shape low–carbon design solutions that make a difference. No corporate red tape just a clear path to progress, recognition for your work, and a team that values what you bring.

The role

As a Senior Mechanical Engineer, you ll take ownership of the mechanical design process from day one. You ll work closely with clients, contribute to strategy, and mentor junior engineers all while working on a wide range of interesting, design–led projects in Bristol and beyond.

Key Responsibilities

• Lead mechanical building services design on multiple projects
• Produce high–quality design documents from calculations and models to specifications and drawings
• Represent the business in client meetings and design team workshops
• Provide day–to–day support and mentorship to junior colleagues
• Keep on top of design standards, building regulations, and sustainable technologies
• Plan and manage your work effectively to meet project deadlines

About our company

We re Box Twenty a growing, independent consultancy based in Bristol. We believe great engineering starts with great people. That s why we prioritise collaboration, innovation, and real flexibility. Our projects span residential, education, leisure, and commercial sectors giving you variety and challenge without the burnout.

The Benefits

• Hybrid working options balance home and office life
• Ongoing support towards Chartership and career development
• A friendly, no–ego team that genuinely enjoys what they do
• Opportunity to work on exciting, sustainable design projects that matter

The person

We're looking for someone who:

• Is Chartered or actively working towards it
• Has solid experience in mechanical building services design
• Understands sustainable, low–carbon design approaches
• Enjoys working collaboratively but can also lead independently
• Communicates clearly and professionally with clients and teams
• Is confident using Revit, IES, Amtech, AutoCAD and similar tools
• Is fluent in English and eligible to work in the UK

What s next

This could be your next big move and we d love to hear from you. Apply now to join a company where your skills, voice, and future are all valued.