Client: With decades of experience operating across the UK, my client has established itself as a leading provider of technical and energy services, delivering large-scale engineering, infrastructure, and decarbonisation projects across both the public and private sectors. They have built a strong reputation for delivering complex mechanical and electrical solutions on high-profile frameworks and long-term partnerships within healthcare, education, commercial, and government environments. Following continued investment and sustained growth, the business has secured a number of major projects focused on low-carbon technologies, retrofit programmes, and net-zero initiatives, positioning them as a key player in the UK’s transition to a more sustainable built environment.

Role: Senior Mechanical Design Engineer - £55,000 - £65,000 + Benefits

The Senior Mechanical Design Engineer will be required to lead the design and implementation of low-carbon mechanical systems across a variety of retrofit and energy efficiency projects. Working closely with junior engineers, the role involves developing HVAC, heat pump, and BMS solutions, preparing technical documentation, and ensuring designs comply with relevant industry standards and regulations.

This position provides an excellent opportunity to strengthen technical knowledge, enhance project delivery capabilities, and contribute to the UK’s net-zero and decarbonisation objectives through sustainable and innovative engineering practices.

Role/Responsibilities:

·      Strong technical grounding in mechanical building services design to integrate low-carbon energy solutions, such as heat pumps, heat recovery systems, high-efficiency HVAC, thermal storage, and demand-led controls for sustainable retrofit in commercial, public-sector, and mixed-use buildings.

·      Proven experience in heat pump design and integration, including hybrid systems and low-temperature heating solutions.

·      Ability to integrate mechanical systems with electrical infrastructure and low-carbon technologies for retrofit and new-build projects.

·      Sound understanding of electrical building services to enable effective coordination.

·      Competent in detailed design from RIBA Stage 2 to 5, including heating and cooling load calculations, ancillary equipment sizing and selection, ductwork and pipework sizing, schematics, schedules, DSEAR assessments, and technical reports. 

·      Participating and contributing to HAZOP and LOPA discussions/ meetings.

·      Experience with heat networks and utilities, from feasibility through to applications and connection design.

·      Proficient in AutoCAD and good working knowledge of BIM workflows (Revit desirable).

·      Support energy modelling and system performance simulations using IES, Energy Pro, and other tools.

·      Ability to lead mechanical design packages on multi-disciplinary projects.

The ideal candidate:

·      6 years+ experience in mechanical building services design.

·      Expertise in mechanical systems design, retrofit strategies, and energy optimisation

·      Strong presentation and communications skills, both verbal and written.

·      Working knowledge of BIM and CAD, ensuring seamless design coordination and digital collaboration.

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

·      Working towards Chartered Engineer status (CEng) with CIBSE or IMechE.

In return they offer:

·      25 days annual leave + public holidays.

·      Life Cover equivalent to 4 times annual salary.

·      Company Stakeholder Pension Scheme.

·      Private Medical Insurance.

·      2 corporate social responsibility days per year.

·      Learning Opportunities with professional qualifications and personalized support programs.

·      Access to the growing employee networks including AccessAbility.