HVAC Design Engineer - Controlled Environments

A well-established UK contractor specialising in high-specification controlled environments is seeking a mid-level HVAC Design Engineer to strengthen its in-house design capability. The business delivers technically demanding cleanroom and critical ventilation projects across life sciences, healthcare and advanced manufacturing sectors.

This is a performance-led design role focused on precision airflow, environmental stability and compliance-driven engineering. This role would suit a technically capable mid-level engineer currently operating as a Mechanical Design Engineer, Building Services Design Engineer, HVAC Design Engineer, Cleanroom Design Engineer, Ventilation Design Engineer or Environmental Control Engineer looking to step into a more specialist, performance-led environment.

You will take responsibility for the mechanical design of HVAC and ventilation systems within controlled and cleanroom environments, translating performance briefs into engineered solutions.

Duties will include:

• Heat loss, heat gain and cooling load calculations
• Psychrometric analysis and humidity control strategies
• Airflow modelling and air change rate calculations
• Design of pressure cascades and contamination control strategies
• Specification of AHUs, HEPA filtration systems, ductwork and associated plant
• Production of ventilation schematics and technical design documentation
• Technical liaison with Project Managers and site teams through installation
• Providing technical support during commissioning and client handover

• 4-5 years' experience in HVAC / mechanical building services design
• Strong understanding of psychrometrics, airflow and heat load calculationsAbility to independently size and specify HVAC plant and ventilation systems
• Confident interpreting technical briefs and performance specifications
• Experience working within a contractor-led, project delivery environment
• Cleanroom, laboratory, healthcare or other critical environment experience advantageous

• Competitive salary (dependent on experience)
• Hybrid working flexibility
• Exposure to technically complex, high-specification projects
• Long-term progression within a growing specialist contractor