Mechanical Design Engineer

Equans UK & Ireland; United Kingdom; On-site; GBP 40,000 - 55,000; Full time

Job summary

Equans UK & Ireland is seeking a Mechanical Design Engineer to support low-carbon mechanical systems design in London or Manchester. The role involves integrating energy solutions like HVAC and heat pumps while collaborating with senior engineers. The company offers a competitive salary, a comprehensive benefits package, and strong career development opportunities in the growing field of decarbonisation.

Benefits

24 days annual leave (+ public holidays)

Employee discount shopping schemes

Gym membership discounts

Cycle to work scheme

Holiday purchase scheme

Corporate social responsibility days

Learning opportunities

Employee Assistance Program

Qualifications

• 3 to 6 years’ experience in mechanical building services design.
• Exposure to retrofit, decarbonisation, or low-carbon projects preferred.
• Degree in Mechanical Engineering or Building Services Engineering.

Responsibilities

• Contribute to the design of low-carbon mechanical systems.
• Ensure compliance with relevant standards.
• Support design updates and technical input during procurement.

Skills

Mechanical Design

Energy Solutions

HVAC

BMS

Energy Modelling

Education

Degree in Mechanical Engineering or Building Services Engineering (BEng or equivalent)

Tools

IES

Energy Pro

BIM

CAD

Job description

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Equans is looking for a Mechanical Design Engineer (Decarbonisation & Energy Solutions) to join our team in London or Manchester. This is a full-time role. On offer is a competitive salary, company vehicle, and benefits package.

The Mechanical Design Engineer (Intermediate) contributes to the design and delivery of low-carbon mechanical systems across a range of retrofit and energy efficiency projects. Working under the guidance of senior engineers, the role includes developing HVAC, heat pump, and BMS designs; supporting project documentation; and ensuring compliance with relevant standards.

This role offers the opportunity to build technical expertise, develop project delivery skills, and actively support the UK’s decarbonisation and net-zero goals through innovative engineering solutions.

What will you deliver?

Mechanical Design & Engineering

• Assist with mechanical system designs across all RIBA Stages.
• Design and integrate low-carbon energy solutions, including heat pumps, district heating, HVAC, and energy-efficient BMS.
• Support energy modelling and system performance simulations using IES, Energy Pro, and other tools.
• Ensure compliance with relevant standards (CIBSE, PAS 2035, MCS, UK Building Regs) and guidelines.
• Support coordination of BIM and CAD-based design processes.
  
  

Design Documentation & Coordination

• Assist in preparing technical reports, drawings, specifications, and schedules.
• Coordinate with energy, electrical, and project delivery teams to ensure holistic system design.
• Participate in design team meetings, capturing key actions and learning opportunities.
  
  

Project & Technical Support

• Support and assist with risk reviews, design updates, and supplier engagement.
• Provide technical input during procurement and early-stage contractor liaison.
• Support internal teams with planning and funding application inputs.
• Assist in identifying design risks and contribute to risk mitigation strategies and update the design risk registers.
  
  

Team Development & Collaboration

• Work closely with senior engineers for mentoring and guidance.
• Participate in design workshops and CPD sessions.
• Support knowledge-sharing within the team and adopt best practices.
• Liaise with the design and project teams to ensure smooth progression into delivery.
  
  

Client & Stakeholder Engagement

• Assist in preparing documents and presentations to clients (internal and external).
• Effectively communicate technical concepts clearly to internal and external stakeholders.
• Support senior team members in engaging with clients and external stakeholders.
  
  

Retrofit Strategy

• Support internal teams and external clients in decarbonisation projects such as ReFit, PSDS, Warmer Homes, GHNF, and HNES.
• Support the development of decarbonisation project planning for public and private sector clients, including local authorities, social housing associations, healthcare, and commercial organisations.
• Conduct technical feasibility assessments for low-carbon technologies such as heat pumps, district energy systems, HVAC, BMS, and solar PV, ensuring their viability and suitability.
• Support the retrofit design process, ensuring mechanical interventions align with decarbonisation goals and funding criteria.
  
  

What can we offer you?

On offer is a competitive salary, and benefit package, which includes;

• 24 days annual leave (+ public holidays)
• Life Cover equivalent to 1.5 times annual salary
• Employee discount shopping schemes on major brands and retailers
• Gym membership discounts
• Cycle to work scheme
• Holiday purchase scheme
• 2 corporate social responsibility days per year
• Broad range of learning opportunities, such as professional qualifications, collective/individual training, and personalized support programmes
• Attractive Employee Referral Rewards Scheme
• Access to our growing employee networks
• 24/7 Employee Assistance Program and access to mental wellbeing app
  
  

Who are you?

Experience:

• 3 to 6 years’ experience in mechanical building services design.
• Exposure to retrofit, decarbonisation, or low-carbon projects preferred.
• Experience with energy analysis and mechanical calculations.
• Previous participation in multidisciplinary project teams.
  
  
  
  

Qualifications:

• Degree in Mechanical Engineering or Building Services Engineering (BEng or equivalent).
• Actively working towards Chartered Engineer status (CEng) with CIBSE or IMechE.
• Willingness to pursue Retrofit Designer Certification (support provided).
  
  

Who are we?

In the UK & Ireland, Equans is a provider of sustainable facilities management and regeneration, and cutting-edge energy and digital services. Our 15,000 employees combine these activities to deliver decarbonisation across the built environment and help businesses, communities, public sector organisations and government to accelerate the transition to a low carbon, resilient world.

Globally, Equans 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 billion euros in 2024. Equans is a subsidiary of the Bouygues group.

Our ambition

At Equans, we are driven by our ambition to be recognised for our operational excellence and as the best place to work for our employees. This commitment extends to achieving global and sustainable performance through Impact, ensuring that everything we do aligns with our core values—Accountability, Respect, Team Spirit, and Service Focus.

We take ownership, act with integrity, and set high standards. We listen, support, and care for one another. We collaborate and build trust to achieve shared goals, always striving to meet our customers' needs in a proactive and pragmatic way. These values shape our culture, strengthen our community, and inspire us to deliver excellence every day.

What's next?

If this role is of interest to you, please click below to register, apply, and track your progress! A member of our Resourcing Team will review your application and be in touch.

As part our commitment to better reflect the markets within which we operate, we encourage applications from women, ethnically diverse individuals and people with disabilities, along with all candidates who identify with protected characteristic groups under the Equality Act 2010.

At Equans we’re committed to delivering a culture where everyone’s voice is heard and supported. We know the value a diverse workforce creates, delivering better results for our people, customers, and stakeholders. Diversity and inclusion is at the core of what we do, should you join Equans you’ll find a welcoming and open workplace where you’re supported and encouraged to be your true self at work.

You’ll also have access to our growing employee networks including AccessAbility (representing those with physical and mental disabilities), Encompass (representing the LGBTQ+ community), RISE (representing people from ethnic backgrounds), Veterans & Reservists, WOMEN Together (representing women in Equans), Working Parents, and Young Professionals.

For this role, you must have evidence of the right to work in the UK. Unfortunately, we are not able to offer a re-location package with this job role. Certain roles may require applicants to undergo a Disclosure check, as noted in the role requirements.

The Equans Resourcing Team manage this requirement. Agency involvement is not required. All related enquiries should come to the resourcing team not direct to Equans Managers.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

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