Europe (Netherlands or Central and Eastern Europe) | Permanent | Hybrid with regular travel

Capax Mundi is recruiting for an early-stage advanced reactor developer building its founding team in Europe. The company has a patent-pending, liquid-metal-cooled reactor concept designed around cost from the start, and test facilities lined up with a European research partner. Materials and corrosion are its largest technical risk. The work spans several material chemistries, and this role owns the materials programme across them.

What you will do

• Own materials selection and the compatibility strategy across the reactor, starting with the area closest to your experience and growing into the others
• Direct the test programme with partner laboratories and in-house, and turn the results into design inputs the engineering team can use
• Build the materials qualification case and the evidence the regulator and investors will ask for
• Work closely with the CTO and design engineers, either as the hands-on technical lead or as the leader of a small materials team

What you bring

• Hands-on materials science experience in nuclear energy: you have owned or directed real experimental and qualification work, not research on paper alone
• Depth in at least one relevant area, such as heavy liquid metal or molten salt corrosion, or fuel cladding and other core materials, and the appetite to grow into the others
• The standing to be the company's materials authority, as a hands-on technical lead or as a team leader
• A PhD in materials science, metallurgy, corrosion or a related field, or equivalent depth built in industry
• Comfort with ambiguity and with building something from the start
• Advantages: materials qualification to RCC-MRx or ASME III Division 5; irradiation testing and post-irradiation examination; alumina-forming steels or coatings

Start is flexible, with the first half of 2027 a good fit.

Applications are handled confidentially by Capax Mundi. Contact Imee Carisma, i.carisma@capaxmundi.com