Senior Mechanical Design Engineer – Building Services Location: Cardiff Salary: Competitive (dependent on experience) Benefits: 25 days holiday + bank holidays, pension, flexible & hybrid working

Role Overview

We are seeking a Senior Mechanical Design Engineer to join a busy and growing building services consultancy in Cardiff. This is an excellent opportunity to lead mechanical engineering design projects across commercial, residential, healthcare, education, and industrial sectors. As a Senior Mechanical Design Engineer, you’ll have autonomy over your work, manage multi-disciplinary projects, mentor junior engineers, and help shape the technical direction of the business.

Key Responsibilities

Lead mechanical design and engineering on projects from concept through to completion Prepare and review detailed calculations, specifications, and design documentation Produce high-quality drawings and BIM/Revit models Manage project deliverables including design risk assessments, client liaison, and coordination with multi-disciplinary teams Mentor and support junior and intermediate engineers Ensure designs comply with UK standards and regulations (CIBSE, Building Regulations, Part L) Stay updated with industry best practices, emerging technologies, and sustainability trends Contribute to business development and maintain strong client relationships

Skills & Experience

Degree in Mechanical or Building Services Engi...