Mechanical Design Engineer

Pertemps; Eastleigh; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading engineering consultancy in Southampton seeks a Mechanical Design Engineer to join their hybrid, collaborative team. This role involves delivering mechanical building services designs, producing technical documents, and supporting junior staff. Candidates should have a degree in Mechanical or Building Services Engineering and 2–5 years of relevant experience. Benefits include 28 days of annual leave, private healthcare, and support for professional development.

Benefits

28 days annual leave + bank holidays

Discretionary bonus

Private healthcare & life insurance

Enhanced pension scheme

Cycle to work scheme

CPD support and training allowance

Qualifications

• 2–5 years’ experience in mechanical design within a building services consultancy.
• Strong awareness of current UK regulations and CIBSE best practices.
• Ambition to develop professionally – working towards chartership is encouraged and supported.

Responsibilities

• Deliver mechanical building services designs including HVAC, ventilation, heating, cooling, and domestic water systems.
• Produce calculations, specifications, reports, and technical drawings.
• Coordinate designs with internal teams.
• Conduct site visits and surveys to gather technical data.

Skills

Proficient with mechanical design software (Hevacomp, IES, Revit, AutoCAD)

Understanding of HVAC systems, plantroom layouts, pipework, ductwork

Excellent written and verbal communication skills

Proactive, organised, and detail-focused approach

Education

Degree or HND in Mechanical or Building Services Engineering

Tools

Hevacomp

IES

Revit

AutoCAD

Job description

Overview

Mechanical Design Engineer – Building Services

Southampton (Hybrid Working)
Full-Time
Competitive Salary + Bonus + Excellent Benefits

What You’ll Be Doing

An established and growing MEP consultancy on the South Coast is looking to appoint a Mechanical Design Engineer to join their friendly, technically focused team in Southampton.

Working on a broad range of building services projects across the healthcare, education, commercial, and research sectors, you’ll be part of a collaborative, multi-disciplinary environment delivering technically sound, sustainable engineering solutions.

This is a great opportunity for someone with a few years of consultancy experience to step into more project ownership, supported by senior mentors and clear career progression.

What You’ll Be Doing

• Deliver mechanical building services designs including HVAC, ventilation, heating, cooling, and domestic water systems
• Produce calculations, specifications, reports, and technical drawings using design tools and software
• Coordinate designs with internal electrical, sustainability, and BIM teams
• Contribute to sustainable and low-carbon strategies across mechanical systems
• Attend client and design team meetings and contribute to technical discussions
• Conduct site visits and surveys to gather technical data
• Ensure designs meet current UK building regulations, CIBSE guides, and client requirements
• Support more junior staff and work closely with senior engineers for project delivery

What You’ll Bring

• Degree or HND in Mechanical or Building Services Engineering (BEng, MEng, or equivalent)
• 2–5 years’ experience in mechanical design within a building services consultancy
• Proficient with mechanical design software (Hevacomp, IES, Revit, AutoCAD, etc.)
• Understanding of HVAC systems, plantroom layouts, pipework, ductwork, and energy efficiency principles
• Strong awareness of current UK regulations and CIBSE best practices
• Excellent written and verbal communication skills
• A proactive, organised, and detail-focused approach to your work
• Ambition to develop professionally – working towards chartership is encouraged and supported

Why You’ll Want to Join

• Work with one of the South Coast’s most respected independent consultancies
• Hybrid and flexible working built around trust and autonomy
• Broad project exposure from hospitals and schools to large-scale commercial and R&D buildings
• Supportive leadership, collaborative culture, and structured career development
• Full backing towards chartership (CEng)
• Competitive salary and full benefits, including:
  • 28 days annual leave + bank holidays
  • Discretionary bonus
  • Private healthcare & life insurance
  • Enhanced pension scheme
  • Cycle to work scheme
  • CPD support and training allowance

If you're looking for a supportive environment, varied project work, and a clear route to progress—this could be the perfect next step.

Apply now for a confidential conversation.