Mechanical Design Engineer – Fire Resistant Structures

Job Description

ALTEN UK is seeking an experienced Mechanical Design Engineer with expertise in fire-resistant structures and hazard analysis to support advanced design and safety studies for critical mechanical systems.You will be part of a system design team, conducting fire risk studies, hazard reviews, and structural evaluations to ensure the mechanical integrity and safety of engineered systems under extreme conditions.

Your main responsibilities will be:

1. Mechanical Design & Safety Analysis

• Support the design and assessment of mechanical structures to ensure fire resistance and compliance with safety requirements.
• Conduct risk assessments and hazard studies (including fire and explosion scenarios) in accordance with DSEAR and relevant safety standards.
• Perform fire exposure and hazard analysis to validate that systems meet operational and safety criteria.

2. Fire Resistance & Structural Validation

• Analyse how fire, heat, and environmental hazards impact the performance and strength of mechanical systems.
• Support fire analysis and modelling activities (including CFD fire analysis where applicable).
• Validate and document system safety under fire and hazard conditions in collaboration with design and safety engineers.

3. Research, Review & System Support

• Carry out engineering research into fire-resistant design methodologies and materials.
• Provide technical input into hazard mitigation strategies and safety documentation.
• Work within multi-disciplinary teams (system design, structural, safety, and analysis) to integrate findings into the overall engineering solution.

You are...

• A Fire engineer with strong analytical and problem-solving skills.
• Experienced in hazard and fire studies, particularly within defence, nuclear, or energy sectors.
• Confident and assertive, able to contribute effectively in technical discussions and safety validation reviews.
• Skilled at working collaboratively within complex project environments, while maintaining a focus on safety and integrity.

Qualifications

Qualifications

Experience, skills and qualifications required:

• Degree (or higher) in Mechanical, Process, Chemical or Structural Engineering or a related discipline.
• Proven experience in mechanical design and hazard/risk assessments (especially fire hazard studies).
• Understanding of fire-resistant design principles, structural response to fire, and safety validation.
• Experience with DSEAR and conducting hazard studies (HAZOP, HAZID).
• Strong analytical capability — able to interpret CFD fire analyses or related data.
• Excellent communication and interpersonal skills, with the ability to influence across teams.

Desirable:

• Background in defence, oil & gas, energy, or nuclear industries.
• Knowledge of fire CFD, structural analysis, and system-level safety validation.
• Familiarity with DOE-810 (export-controlled work – preferred but not essential).

Additional Information

Why join us? 

We foster a community of dually talented individuals who are both entrepreneurs and technology specialists. Our teams embody the spirit of innovation and entrepreneurship, enabling us to develop solutions most efficiently. 

Our commitment to sustainable growth is unwavering, and we continuously strive for accelerated transformation and continuous improvement. Through ALTEN labs, mentoring programs, internal universities, and more, we are always pushing boundaries and embracing new possibilities. 

We offer incredible opportunities to join inspiring projects in the most innovative companies. 

We prioritise your career development with personalised support plans tailored to your own aspirations. We're here to empower you and help you reach your full potential. 

Join our passionate team and start building tomorrow, today! 

In short you get: 

• A personalised career path and a rewarding management style 
• A chance to work on the most exciting engineering projects and technologies along with Premium Customers
• A huge diversity of engineering projects and industries
• A competitive salary
• Private Medical & Travel Insurance
• Pension Scheme
• Cycle-to-work Scheme among many additional benefits
• Social atmosphere, regular gatherings, and team buildings
• Flexible way of working (role dependent)