Job Title: Principal Design Engineer – Mechanical Location: Oxford, Huntingdon or Derby Salary: Up to £65,000 (Negotiable) Shift Type: Full Time – 36.25 hours per week (Agile Working) Benefits: Enhanced annual leave (buy/sell), enhanced family pay, EAP, EV scheme, cycle to work, referral bonus, structured career progression

The Opportunity

A leading Building Services consultancy is seeking a Principal Design Engineer – Mechanical to join its growing team across Oxford, Huntingdon or Derby.

This organisation delivers technically complex and sustainability-led projects across healthcare, education, residential, commercial, pharmaceutical, industrial and public sector schemes. With a strong focus on net-zero carbon and innovative design methodologies, the business has established itself as a respected name within the built environment sector.

The Role

As Principal Mechanical Engineer, you will play a key leadership role within the team, taking ownership of mechanical design delivery while mentoring junior engineers and supporting client development.

Key responsibilities include:

Acting as Project Leader on selected schemes Leading mechanical design from concept through to completion Producing and reviewing calculations, drawings and specifications Attending principal meetings and delivering client presentations Promoting technical excellence within the mechanical discipline Supporting repeat business through strong client relationships Contributing to multidisciplinary collaboration across projects This is a client-facing position offering autonomy, progression and exposure to a broad project portfolio.

We are seeking an experienced Mechanical Building Services Engineer with:

Degree in Mechanical or Building Services Engineering (Chartered or working towards preferred) Minimum 3–4 years’ post-qualification design experience Strong understanding of British & European Standards and Building Regulations Experience with Relux/Dialux, Amtech, Revit and Microsoft suite Knowledge of renewable technologies and BREEAM principles Understanding of embedded generation integration Professional membership with Chartered Institution of Building Services Engineers or Institution of Engineering and Technology Appreciation of electrical engineering for multidisciplinary meetings Knowledge of HTMs would be advantageous. Why Apply?

Clear pathway to senior leadership Exposure to technically challenging, sustainability-led projects Agile working framework Supportive and collaborative team culture Strong investment in professional development Pertemps Engineering Division is a specialist recruiter within the Engineering sector. For a confidential discussion about this opportunity or other engineering roles, please get in touch