Mechanical Design Engineer in City

Hunter Selection; Wales; On-site; GBP 40,000 - 50,000; Full time

Job summary

A leading UK engineering consultancy is seeking a Mechanical Design Engineer to design low-carbon commercial heating projects. You will collaborate with teams to produce detailed designs and ensure compliance with industry regulations. The ideal candidate will have experience in heating plant room design and excellent communication skills. This role offers a competitive salary and flexible working options in central Cardiff.

Benefits

Flexible working options

Private medical insurance

Income protection

Cycle-to-work scheme

Free on-site parking

Opportunities for career development

Qualifications

• Proven experience in designing heating plant rooms and building services systems.
• Chartership (CIBSE, IMechE, IET) desirable but not essential.
• Experience in renewable/low-carbon energy systems is a plus.

Responsibilities

• Develop detailed mechanical and building services designs.
• Produce design documentation and construction drawings.
• Perform heat load and pipework/ductwork sizing calculations.
• Provide on-site engineering support during construction.

Skills

Designing heating plant rooms

Excellent communication skills

Attention to detail

Managing multiple projects

Education

Degree or HND/HNC in Building Services Engineering, Mechanical Engineering, or related discipline

Tools

CAD

Revit

SketchUp

Job description

Mechanical Design Engineer

Location: Cardiff

Salary: 40,000 - 50,000 per year

Job Type: Full-time

About Us

They are a leading UK energy and engineering consultancy specialising in low‑carbon heating and district energy networks. Since 1998, the company has been at the forefront of delivering innovative renewable energy projects that make a significant contribution to the UK's decarbonisation goals.

The organisation is seeking a Mechanical Design Engineer to join its growing team and play a key role in designing and specifying low‑carbon commercial heating projects.

What You'll Do

• Develop detailed mechanical and building services designs for plant rooms and heat distribution systems (RIBA/BSRIA Stages 3 & 4).
• Produce design documentation and construction drawings, including schematics, GA drawings, technical specifications, and schedules.
• Use CAD, Revit, and SketchUp to deliver coordinated designs.
• Perform heat load, cooling load, and pipework/ductwork sizing calculations.
• Collaborate with internal teams to deliver efficient, integrated solutions.
• Conduct site surveys and assess existing plant room arrangements.
• Support tendering processes and review contractor proposals.
• Ensure compliance with Building Regulations, CIBSE, IET, HSE, and sustainability targets.
• Manage design projects and procurement packs.
• Provide on‑site engineering support during construction and commissioning.
• Chair client/project meetings and manage project documentation.
• Mentor and develop junior staff.

What We're Looking For

• Degree or HND/HNC in Building Services Engineering, Mechanical Engineering, Electrical Engineering, or related discipline.
• Proven experience in designing heating plant rooms and building services systems.
• Excellent communication skills and attention to detail.
• Ability to manage multiple projects simultaneously.
• Chartership (CIBSE, IMechE, IET) desirable but not essential.
• Experience in renewable/low‑carbon energy systems is a plus.

Why Join?

• Be part of a team driving the UK's energy transition.
• Competitive salary: 40,000 - 50,000.
• Flexible working options.
• Private medical insurance, income protection, and cycle‑to‑work scheme.
• Free on‑site parking.
• Opportunities for career development and chartership support.

Location

Central Cardiff (must be able to commute or relocate before starting).

Work Location: In person.

Some travel and occasional work outside normal hours may be required.

If you are interested in this position please click 'apply'.

Please note as we receive a high level of applications we can only respond to applicants whose skills & qualifications are suitable for this position. No terminology in this advert is intended to discriminate against any of the protected characteristics that fall under the Equality Act 2010.

For the purposes of the Conduct Regulations 2003, when advertising permanent vacancies we are acting as an Employment Agency, and when advertising temporary/contract vacancies we are acting as an Employment Business.