Senior Graphite Engineer
First seen by Alion on Oct 9, 2026.
Are you ready to play a key role in enabling next-generation nuclear energy for offshore vessels and energy-intensive onshore industry – at the forefront of innovation?
Allseas is developing a 25 MWe / 70 MWth High-Temperature Gas-cooled Reactor (HTGR) to deliver clean, reliable energy for offshore and industrial applications.
Senior Graphite Engineer
Delft - R&D
Your role
As Graphite Expert, you will be part of the multidisciplinary Nuclear Department within the Innovations Division. You will take a leading role in the engineering of graphite as well as the definition, specification, and qualification of graphite materials and components for the HTGR core and related systems.
Key responsibilities
- Co-design the reactor internals;
- Interpret simulations and use this to optimize the design;
- Define and develop graphite specifications;
- Assess graphite behaviour under irradiation, oxidation, thermal cycling, and mechanical loading;
- Lead material selection and qualification processes;
- Develop and review test programs;
- Ensure alignment with nuclear codes and standards;
- Support safety analyses;
- Interface with multidisciplinary engineering teams.
What we expect from you
- MSc or PhD in relevant field;
- Minimum of 10 years of relevant experience;
- Expertise in graphite behaviour under irradiation and high temperature;
- Expertise in graphite interactions with other materials;
- Experience with material qualification programs;
- Strong analytical skills;
- Familiarity with nuclear safety frameworks;
- Excellent communication skills.
What we offer
Join us at the forefront of innovation and contribute to the development of first-of-a-kind nuclear technology. You’ll become part of a dynamic, multidisciplinary team where experts from different fields collaborate to solve complex engineering challenges and turn ambitious ideas into reality.
You can expect:
- Competitive industry benchmarked salary and excellent pension;
- Performance based salary raises and bonuses;
- 30 holidays days per year, flexible working hours;
- Company-sponsored fitness scheme;
- On-the-job training, study budgets and coaching;
- A close-knit community, BBQ’s, parties, (sportive) events and Friday afternoon drinks.
This is more than just a job; it’s an opportunity to help shape the future, push technological boundaries, and play a key role in pioneering solutions that have never been built before.
Stories from colleagues
Witnessing the successful execution of these projects, knowing that I played a role in their development, is a truly satisfying experience.
Olaf Crebolder, Installation Engineer