Junior Mechanical Engineer (Graduate level) – HVAC Systems

Breathing Buildings; Birmingham; Hybrid; GBP 25,000 - 35,000; Full time

Job summary

A forward-thinking building services company seeks a Junior Mechanical Engineer with a degree in Mechanical Engineering. The role involves providing technical support on HVAC systems, conducting thermal modelling, and crafting design proposals. Candidates should possess strong communication skills and a passion for sustainability. The position offers a competitive salary based on experience, along with a comprehensive benefits package including annual leave and training opportunities.

Benefits

Salary depending on experience

Bonus

Annual leave – 25 days plus bank holidays

Pension

Employee Assistance Programme

Employee referral scheme

Ongoing training & development

Qualifications

• Graduate-level qualification in Mechanical Engineering or similar.
• Interest in HVAC systems, ventilation, and sustainability.
• Understanding of HVAC, thermal and fluid dynamics.

Responsibilities

• Undertake dynamic thermal modelling to assess building overheating.
• Carry out CO₂ concentration calculations.
• Produce comprehensive design proposals and technical submissions.
• Review project drawings for equipment requirements.
• Attend design meetings to provide technical support.

Skills

HVAC systems

Thermal and fluid dynamics

Technical writing

Microsoft Excel

VBA or coding experience

Communication

Education

Graduate-level qualification in Mechanical Engineering

Tools

ModelIT

Apache

Vista Pro

MacroFlo

Job description

Junior Mechanical Engineer (Graduate level) – HVAC Systems

Home-based | Location Midlands or Northwest preferred | UK travel (approx. 2 days / week)

Are you a graduate engineer with a passion for building services, sustainability, and innovative ventilation solutions? Join Breathing Buildings as a Junior Mechanical Engineer and play a key role in shaping healthier, more sustainable buildings across the UK.

Why Join Breathing Buildings?

You’ll be part of a forward-thinking company at the forefront of natural and hybrid ventilation, with excellent opportunities for learning, development, and progression in a growing and sustainable sector.

The Role

As a Junior Mechanical Engineer, working within the Consulting Engineer team, you will provide technical and design support to building services consultants, contractors, and our sales team. You’ll work closely with clients including consultants, architects, and contractors, delivering engineering calculations, modelling, and technical guidance to develop the most appropriate ventilation strategies.

Your day-to-day work will include dynamic thermal modelling using our in-house software (4DFlo), preparing design proposals and quotations, and communicating technical information internally and externally. You’ll also support the sales team at client meetings, predominantly across the Midlands and North.

Training will be given to ensure the individual has a sound understanding of the respective product ranges, system designs and selections, current building regulations and product installation.

Key Responsibilities

• Undertake dynamic thermal modelling to assess building overheating
• Carry out CO₂ concentration calculations to determine airflow rates for indoor air quality targets
• Produce comprehensive design proposals and technical submissions
• Review project drawings to identify equipment requirements
• Create and update quotations and process new orders for handover to finance and projects teams
• Attend design and pre-contract meetings with the sales team to provide technical support
• Deliver technical CPDs on natural and hybrid ventilation and associated products
• Liaise with sales and projects teams following order placement
• Support future R&D activities, including control software programming, software and product development, and product testing

About You

• Graduate-level qualification in Mechanical Engineering (or similar)
• Interest in HVAC systems, ventilation, and sustainability
• Some understanding of HVAC, thermal and fluid dynamics, and ventilation principles (training provided)
• Experience in formal technical writing (e.g. reports, responses to technical queries)
• Proficient in Microsoft Excel; VBA or other coding experience is a plus
• Familiarity with ModelIT, Apache, Vista Pro, or MacroFlo (desirable)
• Confident communicator, comfortable engaging with customers and delivering presentations
• Full UK driving licence and willingness to travel

What we can offer you :

• Salary depending on experience
• Bonus
• Annual leave – 25 days plus bank holidays
• Pension
• Health Assured - Employee Assistance Programme
• Employee referral scheme - earn up to £500!
• Quarterly Volution Values Award - receive up to £100 if nominated
• Ongoing training & development

We believe this is an exciting opportunity to carve out a fulfilling career with the Volution Group plc, and we look forward to receiving your CV.

You can learn more about us here; https : / / www.breathingbuildings.com /