Principle Mechanical Design Engineer

Overview

In this role you will lead mechanical design across MOD, MOJ, residential, commercial, and educational projects, shaping technical delivery and sustainable low-carbon solutions. You will mentor junior engineers and work with cross‑functional teams to ensure timely, compliant outcomes. The position offers hybrid working with one day in the office, enabling autonomy and impact on project programming and client relationships. You will contribute to fee proposals and drive high technical standards while advancing energy-efficient strategies.

Pay / Benefits

• Competitive salary up to 75,000 per annum
• Flexible working with potential for one day per week in the office
• Pension scheme and annual leave package
• Professional development and chartership support
• Collaborative team culture and meaningful project work

Responsibilities

• Lead mechanical design and specification of HVAC, public health, and energy systems
• Deliver projects from concept through to completion, meeting UK regulations and client requirements
• Coordinate with multidisciplinary teams (electrical, architectural, structural)
• Provide technical leadership and mentorship to junior engineers
• Attend client meetings, design reviews, and site inspections
• Contribute to fee proposals, resource planning, and project programming
• Ensure designs are delivered on time and within budget
• Support development of low-carbon and energy-efficient mechanical strategies
• Maintain strong relationships with clients, contractors, and stakeholders

Key requirements

• Degree in Mechanical Engineering or Building Services Engineering (or equivalent)
• Chartered Engineer status (or working toward) with a relevant institution (e.g., CIBSE, IMechE)
• Minimum 8 years’ experience in mechanical building services design
• Proven experience delivering MOD, MOJ, residential, commercial, and educational projects
• Strong knowledge of UK building regulations, BS standards, and design codes
• Proficient in AutoCAD, Revit, Hevacomp, IES, and Microsoft Office
• Excellent communication, leadership, and client-facing skills
• Eligible for UK security clearance (MOD/MOJ requirement)

• communication
• leadership
• client-facing
• AutoCAD
• Revit
• Hevacomp

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