Mechanical Design Engineer

Elastic; Cardiff; On-site; GBP 40,000 - 55,000; Full time

Job summary

An innovative engineering consultancy is seeking a Mechanical Design Engineer based in Cardiff, UK. This role involves producing mechanical designs, conducting site surveys, and supporting low-carbon heat projects. The ideal candidate will have experience in mechanical building services, proficiency with CAD tools, and a passion for sustainable energy. You will lead project tasks, mentor junior engineers, and collaborate with internal specialists to contribute to efficient, future-ready energy systems.

Qualifications

• Experience designing mechanical building services.
• Strong understanding of plant rooms, heating, cooling, and distribution systems.
• Ability to collaborate across engineering teams.

Responsibilities

• Produce drawings, schematics, specifications, and project documentation.
• Complete load calculations and technical assessments.
• Attend and lead client meetings, manage project tasks.

Skills

Mechanical design

Low-carbon systems

CAD proficiency

Project management

Collaboration skills

Tools

Revit

CAD

SketchUp

Job description

Are you a mechanical design engineer passionate about low‑carbon design and sustainable energy? Our client – an innovative engineering consultancy leading the way in heat decarbonisation – is looking for a Mechanical Design Engineer to join their growing team.

You'll deliver detailed mechanical designs for plant rooms and building services, support major low‑carbon heat projects across the UK, and play a key role in shaping efficient, future‑ready energy systems.

Responsibilities

• Produce drawings, schematics, specifications, and project documentation
• Complete load calculations, pipework sizing, and technical assessments
• Carry out site surveys of existing plant and distribution systems
• Support tender reviews and contractor evaluation
• Work closely with internal low‑carbon specialists to deliver integrated solutions
• Attend and lead client meetings; manage project tasks and deliverables
• Support and mentor junior engineers as the team continues to grow

Qualifications

• Experience designing mechanical building services
• Strong understanding of plant rooms, heating, cooling, and distribution systems
• Proficiency with CAD tools (Revit, CAD, SketchUp)
• Ability to collaborate across engineering teams and communicate clearly with clients
• Desirable: experience in low‑carbon/renewable systems or working toward Chartership

You are detail‑driven, technically sharp, and motivated by delivering high‑quality engineering solutions. You enjoy working on complex projects, contributing fresh ideas, and playing a part in the UK's journey toward low‑carbon heating.