Senior HVAC Engineer

Amentum; Warrington; On-site; GBP 40,000 - 60,000; Full time

Job summary

A leading company in engineering solutions is seeking a Senior HVAC Engineer in Warrington. The role involves designing ventilation systems, performing psychrometric calculations, and mentoring junior staff. This is an opportunity to join a collaborative team that values inclusion and professional development.

Benefits

Competitive compensation package

Free single medical cover

Digital GP services

Enhanced parental leave pay

Professional development reimbursements

Flexible working arrangements

Qualifications

• Knowledge and experience with UK regulations.
• Extensive experience in building services design.
• Ability to perform psychrometric calculations.

Responsibilities

• Designing ventilation systems based on room data sheets.
• Calculating airflow rates for duct sizing and HVAC designs.
• Mentoring junior staff in nuclear ventilation design.

Skills

HVAC Design

Ventilation Design

Psychrometric Calculations

Mentoring

Technical Documentation

Tools

Hevacomp

AutoCAD 2D

AutoCAD 3D

Revit

Pipenet

Open Buildings

Job description

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We aim to inspire and empower you to deliver your best work, enabling you to evolve, grow, and succeed—today and into the future. With over 55,000 people across 40+ countries, working with us offers diverse opportunities to develop your career within a supportive and inclusive team committed to doing the right thing for our people, clients, and communities.

People are our greatest asset. We offer a competitive package to attract and retain top talent. UK employees benefit from free single medical cover, digital GP services, family-friendly benefits such as enhanced parental leave pay, and free access to employee assistance and parental programs. We also support professional development through reimbursements for relevant training and memberships. Our Collectively program reflects our commitment to giving back, through matched funding, paid volunteering, and charitable donations.

Work-life balance and flexibility are priorities for us. We are open to discussing hybrid, part-time, and flexible working arrangements to suit you and our business needs.

About the opportunity:

Our Critical Mission Solutions business invests in your success. Whether in Aerospace, Defence, Intelligence, IT, Cybersecurity, Nuclear, Automotive, or Telecommunications, we view each project as a human challenge. We bring a collaborative approach to every partnership, aiming to challenge the status quo and transform innovative ideas into solutions for a more connected, sustainable world.

We are seeking a Senior HVAC Engineer in Warrington to support the HVAC Capability team in all aspects of HVAC and Building Services design and delivery.

Some of your duties will include:

• Designing ventilation systems based on room data sheets and principles.
• Calculating air change rates for cooling and containment, airflow rates for duct sizing, and developing HVAC fire and control philosophies.
• Producing HVAC system design deliverables, specifying heat rejection equipment such as air/water cooled condensers, heat pumps, and heat recovery systems.
• Developing system schematics and engineering flow diagrams (EFDs).
• Mentoring junior staff, graduates, and apprentices in nuclear ventilation design.

Requirements:

• Knowledge and experience with UK regulations.
• Ability to perform and verify psychrometric calculations.
• Understanding of steam and condensate processes and system design.
• Proficiency with industry software such as Hevacomp, Open Buildings, AutoCAD 2D/3D, Revit, and Pipenet.
• Experience in producing technical documentation like functional specifications, design basis, equipment specifications, and validation plans.
• Extensive experience in building services design.

Our Culture:

We prioritize safety, integrity, inclusion, and diversity. Supporting one another through a caring culture, we believe in fostering positive mental health and a sense of belonging. We embed inclusion and diversity in everything we do, accepting people regardless of age, disability, gender identity, expression, marital status, mental health, race, faith, sexual orientation, socioeconomic background, or family leave status. Our global employee networks—ACE, Careers, Enlace, Harambee, OneWorld, Prism, Vetnet, and Women’s—support these values. We partner with VERCIDA to attract diverse talent. As a Disability Confident employer, we interview all disabled applicants meeting minimum criteria and welcome flexible working requests. For further support or reasonable adjustments during recruitment, please contact our team.