X4 Group
Senior Mechanical Engineer

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Job Title: Senior Mechanical Design Engineer
Salary: up to £70,000 DOE
Location: Watford, UK
Job Type: Permanent
We’re currently recruiting for a Senior Mechanical Engineer to join an established building services consultancy in Watford, supporting the delivery of a growing portfolio of residential and commercial projects. This is an excellent opportunity for an experienced mechanical engineer looking to take on greater responsibility, strengthen client-facing skills and progress within a supportive team environment.
Key Responsibilities:
- Lead and contribute to mechanical design across projects from concept through to completion.
- Work closely with clients, architects, contractors, and other consultants.
- Support project delivery alongside senior team members.
- Attend design team meetings and develop client-facing experience.
- Undertake site inspections and provide technical reports.
- Carry out mechanical design calculations and technical assessments.
- Contribute to project coordination and technical decision-making.
- Support colleagues and collaborate across wider disciplines where required.
- Help ensure projects meet client briefs, technical requirements, and company objectives.
Reasons to use Rodeo
I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
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Graduate Consultant — 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
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Why you're a good match
You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.
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Experience and Qualifications Required:


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Your very own career expert that helps elevate your application to the next level.
- 5+ years’ experience within a UK MEP / Building Services Consultancy.
- Degree or relevant qualification in Mechanical Engineering, Building Services Engineering, or a related discipline.
- Experience across a range of building services sectors.
- Strong understanding of mechanical building services design, including HVAC, heating, cooling, and ventilation systems.
- Experience using relevant mechanical design and calculation software.
- Good working knowledge of CAD and/or Revit.
- Ideally working towards Chartership with a recognised engineering institution.
- Confident communicator with the ability to work effectively with clients and multidisciplinary teams.
- Strong technical and project coordination skills.
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