Mechanical Design Engineer

Exentec Hargreaves is a pioneering UK leader in construction engineering of HVAC and specialist ventilation systems for safety critical facilities. For more than 150 years, Exentec Hargreaves has proved our value as the largest and most unique construction engineering business specialising in HVAC in the Energy & Decommissioning, Defence and Transport sectors.

The HVAC Design Engineer is responsible for the planning, design, and development of heating, ventilation, and air conditioning systems for various types of buildings. The role ensures that HVAC systems are energy-efficient, sustainable, and compliant with relevant codes and standards. The engineer works closely with architects, contractors, and other engineering disciplines to deliver integrated building solutions.

Key Accountabilities

• Design HVAC systems including ductwork, piping, and equipment layout.
• Perform heating and cooling load calculations using industry-standard software.
• Select HVAC equipment and prepare technical specifications.
• Develop detailed design drawings and documentation using AutoCAD, Revit, or similar tools.
• Ensure compliance with local building codes, Awe Standards, Sellafield Standards and energy regulations.
• Collaborate with multidisciplinary teams throughout the project lifecycle.
• Conduct site visits for inspections, commissioning, and troubleshooting.
• Prepare cost estimates and support procurement processes.
• Integrate sustainable and energy-efficient design practices.
• Stay updated with emerging HVAC technologies and industry trends.

Experience, Skills & Qualifications

Essential

• Bachelor’s Degree in Mechanical Engineering or Building Services Engineering (or equivalent).
• Master’s degree (preferred but not required).

Highly Desirable (but not essential)

• Chartered Engineer (CEng) or working towards it.
• CIBSE membership, or equivalent professional affiliations.

Required Skills:

Technical:

• Proficiency in HVAC design software (e.g., Hevacomp).
• Strong knowledge of AutoCAD, Revit MEP, and BIM workflows.
• Understanding of thermodynamics, fluid dynamics, and heat transfer.
• Familiarity with relevant codes and standards (e.g., CIBSE, BS EN standards).

Analytical & Problem-Solving:

• Ability to perform detailed engineering calculations.
• Strong troubleshooting and diagnostic skills for HVAC systems.

Project & Communication:

• Excellent written and verbal communication skills.
• Ability to manage multiple projects and meet deadlines.
• Strong teamwork and collaboration skills.

Soft Skills:

• Attention to detail.
• Adaptability and willingness to learn.
• Client-focused mindset.

Why Join Exentec Hargreaves?

• Work on landmark UK infrastructure projects.
• Be part of a company with 150+ years of engineering excellence.
• Gain exposure to complex, safety-critical environments in energy, defence, and transport.
• Benefit from structured learning, mentoring, and professional development.
• Join a supportive and collaborative team culture that values innovation and quality.

Exentec Hargreaves is an Equal Opportunities Employer. We are committed to equal employment opportunities regardless of age, sexual orientation, gender, religion, race, ethnic origin, disability, marital status or parental status. We base all our employment decisions on merit, job requirements and business needs.