Mechanical Engineer; HVAC

Mechanical Engineer (HVAC)

Location: Sizewell B, Leiston, Suffolk

Contract: Permanent, Full-Time (37.5 hours/week)

Salary: Competitive, based on experience

Dalkia UK is looking for a qualified and experienced Mechanical Engineer (HVAC) to join our dedicated team at Sizewell B, working under our long-term partnership with EDF. This is a hands‑on, technically challenging role in a highly regulated, heavy industrial environment—perfect for an engineer who thrives on responsibility and wants to contribute to one of the UK’s key energy generation sites.

• Carry out planned preventative maintenance (PPM) on a wide range of HVAC and mechanical systems, including heavy plant equipment.
• Diagnose and resolve faults arising from help desk requests and operational reports.
• Support with maintenance of HVAC systems across the site, including office and welfare facilities.
• Maintain and repair mechanical plant including pumps, air compressors, fans, motors, drives, pneumatic controls, and pressurisation systems.
• Ensure all work is delivered to high standards of health, safety, and quality assurance, in line with nuclear site requirements.
• Participate in ongoing training and development to maintain industry certifications and site competency.

You’ll be a hands‑on engineer with a strong background in mechanical engineering, ideally gained in an industrial, utilities, energy, or nuclear environment. You take pride in your technical ability, attention to detail, and commitment to safety.

• Time‑served Mechanical Engineer with a relevant NVQ Level 3 qualification
• Proven experience working on mechanical systems in an industrial setting, preferably HVAC
• Comfortable working with both mechanical and basic electrical systems
• Strong understanding of health & safety regulations and industry standards
• Competent with Microsoft Office and digital maintenance systems

• 24 days annual leave + bank holidays
• Overtime opportunities
• Excellent pension contributions
• Flexible benefits including:
  • Retail discounts
  • Electric car scheme (Subject to acceptance)
  • Mental health and wellbeing support

• Access to our Employee Assistance Programme (EAP)
• Referral and recognition bonuses
• Ongoing training and career progression opportunities

At Dalkia, we are proud to promote a diverse and inclusive working environment. We welcome applications from all backgrounds and will make reasonable adjustments throughout the recruitment process to support you.