Mechanical Design Engineer – Decarbonisation and Energy

Astute People; Barnard Castle; On-site; GBP 40,000 - 60,000; Full time

Job summary

A leading facilities management company is seeking a Senior Mechanical Design Engineer to join their decarbonisation team. The role involves leading mechanical design projects and integrating sustainable technologies into both retrofit and new build projects. With a competitive salary of up to £60,000 and a robust benefits package, this is an excellent opportunity for experienced professionals passionate about sustainability.

Benefits

Private medical insurance

Progression and training opportunities

Qualifications

• 6–10 years' experience in mechanical building services design and project delivery.
• Proficiency in mechanical design and decarbonisation project delivery.

Responsibilities

• Lead mechanical design development from RIBA Stages 2 to 4.
• Design sustainable technologies including HVAC, BMS and district heating systems.
• Conduct energy modelling and simulations.

Skills

Communication

Collaboration

Innovation

Education

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

Chartered Engineer status (CEng) with CIBSE or IMechE

Tools

IES

Energy Pro

PVsol

Job description

Astute's Power team is partnering with a leading facilities management company to recruit a Senior Mechanical Design Engineer to work in their decarbonisation team at either their London, Newcastle or Manchester office.

The Senior Mechanical Design Engineer role comes with a starting salary of up to 60,000 + benefits.

If you're an experienced Senior Mechanical Design Engineer, ideally with experience in the decarbonisation space who is looking for work then upload your CV to apply today.

Responsibilities and duties of the Senior Mechanical Design Engineer role

Reporting to the Lead Mechanical Design Engineer you will:

• Lead mechanical design development from RIBA Stages 2 to 4 and provide technical support through Stages 5 and 6.
• Design and integrate sustainable technologies such as heat pumps, HVAC, BMS, and district heating systems into retrofit and new build projects.
• Conduct energy modelling and performance simulations using tools such as IES and Energy Pro.
• Ensure all designs comply with industry standards (CIBSE, PAS 2035, UK Building Regs, etc.).
• Manage and coordinate BIM and CAD–based mechanical design processes.
• Oversee integration of mechanical, electrical, and energy systems to ensure seamless delivery.
• Participate in technical reviews for tenders, commercial input, and project execution.
• Identify and mitigate design risks; maintain and manage design risk registers.
• Provide leadership in developing decarbonisation strategies for public and private sector clients.
• Produce clear technical reports, specifications, and design documentation.

Professional qualifications
We are looking for someone with the following:

• Degree–qualified in Mechanical or Building Services Engineering (BEng or equivalent).
• Chartered Engineer status (CEng) with CIBSE or IMechE preferred.
• 6–10 years' experience in mechanical building services design and project delivery.
• Proficiency in simulation/design software such as IES, Energy Pro, and PVsol.
• Prior involvement in funding–driven public sector decarbonisation projects (e.g. PSDS, SHDF).

Personal skills

• Strong communicator with the ability to explain complex technical ideas to stakeholders.
• Collaborative mindset with experience leading and mentoring within multidisciplinary teams.
• Innovation–driven, with a passion for sustainability and continuous improvement.

Salary and benefits of the Senior Mechanical Design Engineer role

• Salary between 40,000 – 60,000 (dependant on experience)
• Benefits package including private medical insurance
• Progression and Training opportunities

INDPOW

Astute People are acting as an employment agency in relation to this vacancy. We do not discriminate on the grounds of age, race, gender, disability, creed or sexual orientation and comply with all relevant UK legislation. We encourage applications from individuals from all backgrounds but candidates must be able to demonstrate their ability to work in the UK. Astute is also committed to the government's Disability Confident Employer initiative. We endeavour to get back to everyone, however, if you have not heard anything after 7 days, please consider your application unsuccessful.