Overview In this role you will lead an interdisciplinary nuclear engineering effort for Kaleidos, guiding physics, shielding, safety analysis, I&C, and regulatory work from initial design through verification and licensing. You will bridge technical analysis with practical reactor design decisions, while mentoring engineers and coordinating cross-functional teams. The position sits at a mission-driven startup focused on portable, mass-produced microreactors and rapid deployment. This is an opportunity to shape the core of a first-of-a-kind system with significant impact across remote and critical-power applications.
Compensation / Benefits- Stock options
- Comprehensive health benefits
- One Medical memberships
- Vision and dental coverage
- Flexible PTO
- On-site lunch and snacks
Responsibilities- Lead interdisciplinary reactor physics and engineering efforts across core performance, shielding, dose, activation, and safety analysis
- Set technical priorities, plans, resources, and ownership across the nuclear engineering organization
- Serve as technical authority for neutron transport and Monte Carlo methods
- Own projects from requirements to design iterations, model development, analysis, and documentation
- Guide analyses of criticality, depletion, power distribution, shutdown margin, and radiation transport
- Translate analyses into actionable design requirements for core, shielding, controls, and instrumentation
- Establish rigorous model verification/validation, peer review, and configuration control practices
- Collaborate with systems, thermal, mechanical, electrical, test, safety, and regulatory teams
- Translate standards and regulatory needs into analysis plans, criteria, and verification activities
- Support reactor testing and startup with instrumentation needs and acceptance criteria
- Identify risks, drive problem resolution, and communicate decisions to teams and leadership
- Mentor engineers through guidance and coaching
Key requirements- Bachelor's degree in nuclear engineering or related technical discipline
- 9+ years of nuclear engineering experience across design, analysis, testing, licensing, safety, or operations
- Experience leading complex nuclear engineering projects and multidisciplinary teams
- Experience hiring or mentoring nuclear engineers
- Deep knowledge of neutron transport theory and Monte Carlo methods
- Experience with MCNP, OpenMC, or comparable neutron/radiation transport models
- Understanding of criticality, reactivity coefficients, depletion, power distribution, shutdown margin, and uncertainty analysis
- Ability to translate analysis into reactor design decisions and regulatory documentation
- Familiarity with model verification/validation, configuration control, peer review, and software quality practices
- Strong written and verbal communication skills
- leadership and mentoring
- clear communicator of complex analyses
- collaboration across multidisciplinary teams
- neutron transport theory
- Monte Carlo simulation methods
- nuclear data and statistical convergence
