Principal Mechanical Design Engineer

Bouygues Energies & Services Industry, an Equans Group Company is recruiting a Principal Mechanical Design Engineer to work in a design team, delivering technical services at bid, design, installation and commissioning phases.

The Principal Mechanical Design Engineer will lead high profile projects and mentor more junior engineers. This is a hands‑on role which will focus on the delivery and management of design and technical support services to data centres, clean rooms, pharmaceutical and other mission‑critical projects.

• Manage and deliver design work throughout design and build projects in collaboration with the project teams and take full accountability for the design of mechanical services for data centres and other mission‑critical projects.
• Undertake design reviews and appraisals and provide technical advice/assistance to the projects teams.
• Guide and develop design team members and act as a mentor to assist the development of the team to achieve goals and objectives.
• Take responsibility for checking calculations and provide monthly design progress reports in each project reporting on technical risks and opportunities.
• Provide design/technical assessment support of tenders and delivery high‑quality design solutions that address contractual obligations and mitigating technical risk.
• Be the senior engineer on projects and lead regular design meetings with the project team.
• Provide engineering support to maintain technical audit trail through design, procurement, installation and commissioning stages.
• Successful delivery of projects with high‑quality design completed on time and within budget.
• Delivery of design in line with health and safety requirements.

• 25 days annual leave (+ public holidays)
• Life Cover equivalent to 4 times annual salary
• Company Stakeholder Pension Scheme
• Private Medical Insurance (Family Cover)
• 2 corporate social responsibility days per year
• Broad range of learning opportunities, such as professional qualifications, collective/individual training, and personalised support programmes
• Attractive Employee Referral Rewards Scheme
• Access to our growing employee networks including Access Ability (representing those with physical and mental disabilities), Encompass (representing the LGBTQ+ community), RISE (representing people from ethnic backgrounds), WOMEN TOGETHER (representing women in Equans), Working Parents, and Young Professionals
• 24/7 Employee Assistance Program and access to mental wellbeing app

• Recognised qualification in mechanical / building services engineering. i.e. BEng / Meng.
• Proven experience in mechanical services design in line with appropriate standards, guidance and client’s requirements.
• Experience of working on multiple projects concurrently and manage and communicate priorities with the team.
• Experience of developing team members and providing leadership to engineers and designers.
• An effective decision maker in consultation with projects stakeholders and use judgement to escape the process.
• Proven experience of undertaking and leading the design of mechanical services, particularly for data centres and other mission‑critical projects.
• Experience in undertaking and managing specialist design and engineering services – Sustainability & compliance (BREEAM, heat, fume and noise emissions, Part L), mathematical modelling (CFD, FEA, etc.) and services which support our designs.
• Experience delivering and management of design in line with RIBA plan of work, BSRIA BG6 schedule of services and ISO 19650 requirement up to and inclusive of RIBA Stage 5.
• Experience working with typical design and build contracts, JCT, NEC, MF1 and others.

Equans, a subsidiary of the Bouygues group, is a world leader in the energy and services sector with operations in 20 countries, 90,000 employees working on 5 continents and a turnover of 19.2 billions euros in 2024.

Bouygues Energies & Services Industry, a Equans Group company, specialise in executing technically challenging, time sensitive projects in critical environments: clean rooms, laboratories, industrial plants, and data centres. With over 50 years of experience, we…