Senior/Principal Mechanical Design Engineer

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

Job summary

A well-established Building Services Contractor in South Wales seeks a Senior or Principal Mechanical Design Engineer to lead projects and mentor junior staff. The role involves managing designs from concept to completion, ensuring compliance with regulations while offering a competitive salary and flexible working arrangements. Ideal candidates should possess a relevant degree and solid experience in mechanical design. Join a supportive team focused on a variety of exciting projects.

Benefits

Competitive salary

Flexible working arrangements

Career progression opportunities

Qualifications

• Solid experience in mechanical building services design.
• Comfortable leading design processes and project delivery.
• Good understanding of sustainable design principles.

Responsibilities

• Lead mechanical design on projects from concept to completion.
• Attend and chair design meetings.
• Mentor junior engineers and support training.

Skills

Mechanical design leadership

Building regulations compliance

Communication skills

Technical knowledge in HVAC

Education

Degree or HNC/HND in Building Services Engineering

Tools

Revit

AutoCAD

Hevacomp

IES

Job description

About the Role

I'm working with a well–established and highly respected Building Services Contractor based in South Wales who are currently looking to strengthen their in–house mechanical design team with the addition of a Senior or Principal Mechanical Design Engineer.

With a strong pipeline of secured work across a range of sectors – including commercial, education, healthcare, residential, hospitality, and retail – this is an exciting opportunity for someone who wants to step into a role with real responsibility and the backing of an experienced, supportive team.

Day–to–Day Responsibilities

• Lead mechanical design on projects from concept to completion
• Attend and chair design and coordination meetings
• Work closely with other disciplines and the in–house construction team
• Ensure compliance with relevant building regulations, CIBSE guides, and standards
• Develop detailed designs using relevant software (e.g. Hevacomp, IES, Revit, AutoCAD)
• Oversee and review drawings, schematics, and specifications
• Liaise directly with clients and represent the business in a professional manner
• Mentor junior engineers and support training where needed
• Report project progress to the M&E Design Director

What They\'re Looking For

• Degree or HNC/HND in Building Services Engineering (or similar discipline)
• Solid experience working on mechanical building services design, ideally within a contractor or consultancy
• Comfortable leading the design process and taking ownership of project delivery
• Strong technical knowledge across HVAC, LTHW/CHW systems, and sustainable design
• Good understanding of building regulations, CIBSE codes, and design standards
• Experience with industry–standard software (e.g. Revit, IES, AutoCAD, Hevacomp)
• Good commercial awareness and ability to design within a given budget
• Strong communication skills and confidence engaging with clients and external teams
• Previous experience in a contracting environment is beneficial – but not essential (training can be provided)

What\'s on Offer

• A secure, long–term role with a company that values loyalty and invests in its people
• Competitive salary and package (negotiable depending on experience)
• Flexible working arrangements available where needed
• Exposure to a wide variety of technically challenging and rewarding projects
• Real autonomy within a trusted team and clear progression opportunities
• The chance to influence the growth of the design function and contribute to the wider business strategy

If you\'re an experienced mechanical design engineer looking to take that next step – or just want to work on high–quality projects in a company that truly values its staff – I\'d love to hear from you. You can apply directly or get in touch for a confidential chat.