Principal Mechanical Design Engineer

Salary/Rate:£70,000 - £75,000
Job type:Perm
Town/City:London
County:London
Sector:Design
Job ref:MED
Post Date:09. 01. 2026
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Meet Our Recruiter

Robin Greenwood
Robin Greenwood
Managing Director

About the Role

Snowdon Recruitment are working with a well-established Building Services company who are looking for a Principal Mechanical Design Engineer to join their team. 

This is a company that aims to provide their employees with lifelong careers by offering benefits such as:

  • Basic Salary between £70,000–£75,000 DOE

  • Hybrid and flexible working 

  • Yearly bonus scheme

  • 33 days holiday

  • Enhanced pension scheme 

  • Holiday buy and sell scheme

Responsibilities for the Principal Mechanical Design Engineer 

  • Take full ownership of client relationships, clearly defining project scope and ensuring expectations are met throughout the design process.

  • Work collaboratively with multidisciplinary engineers to deliver designs that align with agreed scopes, internal quality standards, industry best practice, health and safety legislation, and client requirements.

  • Lead and oversee the preparation of detailed mechanical building services designs across a range of project types.

  • Produce high-quality specifications, drawings, and technical reports within agreed deadlines.

  • Provide an end-to-end service by monitoring project progress, design changes, and emerging requirements from concept through to completion.

  • Conduct site surveys, technical investigations, and information gathering to inform and validate design decisions.

  • Prepare mechanical calculations to support equipment selection and overall system performance.

  • Champion sustainable and energy-efficient design principles in all project work.

  • Prepare schematics, layouts, design notes, and supporting documentation as part of comprehensive design submissions.

  • Present drawings and design information for internal and external review to ensure robust quality assurance.

  • Support, guide, and mentor junior engineers, contributing to the development of the wider team.

We encourage applications from Senior Engineers looking to progress into a Principal Mechanical Design Engineer. 

If this Principal Mechanical Design Engineer role is of interest, we invite you to apply and a member of our team will be in touch.

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