Junior Tunnel Ventilation Engineer

  • Snc-Lavalin
  • Epsom, Surrey
  • 13/06/2026
Full time Information Technology Telecommunications

Job Description

Job Description Overview

Take our vision into the future. You might know us for the great work we do across our wide variety of projects. We're proud to say it's thanks to our people's diversity of thought, expertise and knowledge. And when you join us, you'll be a part of this genuinely collaborative environment, where everyone's voice is valued and treated equally. We're passionate about what we do, but we don't take ourselves too seriously. Simply put, this a great place to be. We offer a range of family friendly, inclusive employment policies, flexible working arrangements and employee resource groups to support all employees.

Job Role

As a Junior Tunnel Ventilation Engineer, you will design and analyse tunnel ventilation systems for both normal and emergency operations. You will also assess the related elements, such as fire and life safety systems, following client specifications and worldwide standards. You will work on a range of underground facilities and tunnels, including metro systems, railway stations, road tunnels, cable tunnels and more.

Responsibilities
  • Support delivery of road and rail tunnel ventilation projects and fire and life safety assessments.
  • Strengthen and expand our presence in the UK road and rail sector.
  • Assist in technical work and engagement with project teams and clients.
  • Support business activities, including bids and technical studies.
  • Work towards achieving professional chartership (e.g. CEng).
  • Project & Technical Delivery: Design and assessment of tunnel ventilation systems; Assist with 1D modelling (SES / IDA), CFD studies, and basic risk assessments; Contribute to fire and life safety assessments and ventilation strategies; Support commissioning activities, testing, and asset performance reviews; Prepare technical reports and support production of client deliverables.
  • Business Growth & Client Engagement: Support team activities to grow the UK and international market; Assist in building relationships with clients in the rail and road sectors; Contribute to identifying opportunities in tunnel ventilation and fire/life safety projects; Support the preparation of bids and technical proposals.
  • Internal Capability Development: Work collaboratively with senior engineers and wider teams; Support continuous improvement of tools, methods, and best practices; Engage in training and development to build technical capability.
Qualifications & Experience
  • Degree in Engineering (Mechanical, Civil, Aerospace or related discipline).
  • Working towards, or committed to achieving, professional chartership (e.g. CEng).
  • Understanding or interest in tunnel ventilation and fire/life safety.
  • Familiarity with SES/IDA tunnel modelling tools and CFD tools (e.g. FDS, Pyrosim, Pathfinder).
  • Understanding of fundamental ventilation principles and airflow, and fire and smoke behaviour.
  • Good communication and teamwork skills.
  • Experience with modelling or simulation tools in underground infrastructures.
  • Awareness of relevant standards (e.g. NFPA, PIARC, UK guidance).
  • Interest in developing technical expertise in tunnel ventilation and fire safety.
  • Eager to learn and develop technical skills; proactive and willing to take initiative with guidance; good communication skills; team oriented mindset; enthusiastic about developing a career in tunnel engineering.
Benefits & Rewards
  • Competitive salaries and employee rewards.
  • Brilliant range of benefits tailored to your health, wellbeing, financial and lifestyle choices.
  • Opportunities for training and professional development.
  • Hybrid working culture and flexible holiday allowances.
Additional Information

Security clearance: This role may require security clearance and offers of employment will be dependent on obtaining the relevant level of clearance. The vetting process is delivered by United Kingdom Security Vetting (UKSV) and may require candidates to provide proof of residency in the UK of 5 years or longer.

EEO Statement: As an Equal Opportunities Employer, we value applications from all backgrounds, cultures and ability. As a Disability Confident Leader, we are committed to offering an interview to all applicants who have a disability and meet the essential criteria. If you would like to be considered under this commitment, please let us know at the application stage.

Employment Details

Worker Type: Employee

Job Type: Contractual (Fixed Term)