Mechanical Design Engineer – High-Integrity Pressure Systems

Are you passionate about engineering? Do you want to make a difference?  

You could be one of our 54k+ colleagues in over 30 countries working on inspiring projects in the most innovative companies.  

Join us and start building tomorrow’s world today!

What will you be doing? 

As a Mechanical Design Engineer – High-Integrity Pressure Systems, you will join our advanced engineering team supporting the development of critical mechanical systems within the nuclear energy sector. You’ll play a key role in designing and realising complex pressure equipment used in demanding, high-integrity environments—contributing directly to the technologies shaping the future of sustainable energy.

Your main responsibilities will be: 

• Lead or support the detailed design of pressure equipment such as reactor vessels, heat exchangers, filters, and tanks.
• Develop engineering solutions from concept to final definition, including 3D models, drawings, documentation, and design justifications.
• Work collaboratively within integrated project teams, alongside suppliers and manufacturing experts, to deliver cost-effective and technically robust designs.
• Navigate evolving requirements through structured problem-solving, iterative design development, and cross-functional coordination.
• Contribute to technical governance processes, including peer reviews and design risk assessments.
• Support product lifecycle activities including manufacturing readiness, integration planning, and maintaining digital traceability.

Who are we looking for? 

• We’re seeking proactive mechanical engineers who thrive on complex technical challenges and want to be part of the nuclear energy transformation. If you have experience designing pressure systems in safety-critical industries—and enjoy translating design concepts into buildable, compliant hardware—you’ll thrive in this role. We welcome applicants from nuclear, oil & gas, defence, aerospace, or other highly regulated sectors.

You are... 

• Passionate about engineering 
• result-oriented 
• proactive

Experience, skills and qualifications required: 

Required:

• Degree in Mechanical Engineering or a related discipline
• Proven experience in pressure equipment design and integrity assessment
• Familiarity with relevant design codes (e.g. ASME, EN13445, PD5500)
• Knowledge of materials, fabrication methods, and design-for-manufacture principles
• Proficient with CAD and digital design tools
• Strong communication skills and ability to work in cross-functional teams

Desirable:

• Understanding of nuclear design codes and safety classification processes
• Experience with verification, validation, and technical substantiation
• Familiarity with supplier engagement and manufacturing documentation review
• Background in systems engineering or structured product development

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 Insurance
• Pension Scheme
• Cycle-to-work Scheme among many additional benefits
• Social atmosphere, regular gatherings, and team buildings
• Flexible way of working (role dependent)