Senior / Principal Mechanical Engineer

RGB Recruitment; Winchester; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid and flexible working

Annual performance bonus

Company pension

Private medical insurance

Life assurance

Career progression

Job summary

RGB Recruitment is seeking a Senior/Principal Mechanical Engineer for the Winchester office to lead building services projects from feasibility through to delivery.

You will mentor engineers, coordinate with architects and other engineers, and drive energy-efficient, low-carbon design across a range of sectors. Hybrid working and clear progression opportunities are offered.

Qualifications

• Significant experience in Mechanical Building Services design.
• Experience leading Mechanical Building Services projects.
• Strong HVAC and building services knowledge.
• Chartered Engineer (CEng) status or working towards Chartership.
• Experience with Revit, AutoCAD, Hevacomp and IES.
• Excellent client-facing and communication skills.
• Strong commercial awareness and project management abilities.
• Mentoring and developing engineers.

Responsibilities

• Lead the Mechanical design and delivery of Building Services projects across multiple sectors.
• Act as the lead Mechanical Engineer, taking responsibility for concept and detailed design.
• Coordinate multidisciplinary project teams and input.
• Develop designs, calculations, reports, specs and technical documentation.
• Carry out design reviews and quality assurance for standards and client requirements.
• Build and maintain client relationships and provide technical support.

Skills

Project management

Leadership

Client liaison

Mentoring

Energy efficiency

Sustainability

Education

CEng status

Degree in Building Services/Mechanical Engineering

HNC/HND in related field

Tools

Revit

AutoCAD

Hevacomp

IES

Job description

Senior / Principal Mechanical Engineer

Salary: Competitive + Benefits

The Company

An excellent opportunity has arisen for a Senior / Principal Mechanical Engineer to join the Winchester office of a well‑established, employee‑focused multidisciplinary consultancy with an outstanding reputation for delivering innovative engineering and design solutions across the UK. The business provides integrated consultancy services across the built environment, delivering projects from concept through to completion. Their Building Services division works across a diverse portfolio of developments, including residential, commercial, healthcare, education, regeneration and mixed‑use schemes, providing sustainable and technically innovative Mechanical and Electrical engineering solutions.

The Role

As a Senior / Principal Mechanical Engineer, you'll take a leading role within the Mechanical Building Services team, managing projects from feasibility through to completion while providing technical leadership to engineers and technicians. Depending on your level of experience, you'll act as either the lead Mechanical Engineer or support the leadership of major projects, working closely with clients, architects, contractors and multidisciplinary design teams to deliver innovative, coordinated and commercially successful engineering solutions. This is an excellent opportunity for an experienced engineer looking to progress their career within a consultancy that offers genuine opportunities to develop into, or further establish themselves at, Principal level.

Responsibilities

• Lead the Mechanical design and delivery of Building Services projects across multiple sectors.
• Act as the lead Mechanical Engineer, taking responsibility for concept and detailed design.
• Manage multidisciplinary project teams, coordinating Mechanical, Electrical and specialist design input.
• Develop Mechanical Building Services designs, calculations, reports, specifications and technical documentation.
• Carry out design reviews and quality assurance to ensure compliance with industry standards and client requirements.
• Build and maintain strong client relationships while providing a high level of technical support and advice.
• Advise clients on energy efficiency, sustainability and low‑carbon design strategies.
• Undertake Mechanical design calculations using industry‑standard software, including Hevacomp and IES where appropriate.
• Coordinate with architects, structural engineers, contractors and other consultants throughout project delivery.
• Attend client, design and technical meetings.
• Ensure compliance with Building Regulations, British Standards and health & safety legislation.
• Mentor, manage and develop junior engineers and apprentices.
• Support business development and contribute to the continued growth of the Mechanical Building Services team.

Requirements

• Significant experience within Mechanical Building Services Design.
• Consultancy or contractor design background.
• Experience leading Mechanical Building Services projects.
• Strong technical knowledge of HVAC and Mechanical Building Services systems.
• Degree, HNC or HND qualified in Building Services Engineering, Mechanical Engineering or a related discipline.
• Chartered Engineer (CEng) status, or actively working towards Chartership.
• Experience with industry‑standard design software including Revit, AutoCAD, Hevacomp and IES.
• Excellent client‑facing, leadership and communication skills.
• Strong commercial awareness and project management ability.
• Passion for mentoring and developing engineers.

Benefits

• Competitive salary.
• Hybrid and flexible working.
• 25 days annual leave plus bank holidays.
• Option to buy, sell or carry over annual leave.
• Annual performance bonus.
• Car allowance (role dependent).
• Company pension scheme.
• Private medical insurance.
• Life assurance and income protection.
• Private GP access.
• Discounted gym membership.
• Three paid volunteering days each year.
• Ongoing CPD and professional development.
• Clear progression into senior leadership within a growing multidisciplinary consultancy.

Why Apply?

This is an outstanding opportunity for a Senior or Principal Mechanical Engineer to join one of the UK's leading multidisciplinary consultancies. You'll lead technically challenging projects across a diverse range of sectors while influencing project delivery, mentoring engineers and helping shape the future growth of an established Building Services team. Whether you're an established Principal Engineer or a Senior Engineer looking to take the next step, this role offers excellent career progression, flexible working and exposure to prestigious projects nationwide.

If you're interested, please contact Conner Richards at RGB Recruitment – (url removed).