Hiring: Principal Nuclear Engineer Company: Radiant Location: El Segundo, CA Job Posted Time: 2026-09-12 13:36:36 Employment Type: Full-time / Remote Target Skills & Keywords : C, Python, Workday About the job Experience: •9+ years of relevant nuclear engineering experience across reactor design, analysis, testing, licensing, safety, or operations. Required Skills: •Lead an interdisciplinary team working across reactor physics, core performance, shielding, dose and activation, thermal-hydraulics, safety analysis, I&C, and operations. •Establish technical priorities, project plans, resource needs, and clear ownership across the nuclear engineering organization. •Serve as a technical authority for neutron and radiation transport and Monte Carlo simulation methods. •Own nuclear engineering projects from requirements capture and design iteration through model development, analysis, technical review, and final documentation. •Guide analyses of criticality, reactivity control, shutdown margin, power distribution, depletion, temperature feedback, radiation transport, dose, activation, and shielding performance. •Translate analytical results into actionable requirements and design decisions affecting the core, shielding, control systems, instrumentation, fluid systems, and structures. •Establish technically rigorous practices for model verification and validation, peer review, configuration control, uncertainty evaluation, and documentation. •Partner cross-functionally with reactor systems, thermal, mechanical, electrical, test, operations, safety, and regulatory teams to resolve multidisciplinary design challenges. Qualifications: •Willing to support extended hours when needed to meet critical program milestones. •Must work 100% onsite at Radiant’s El Segundo headquarters. Compensation: •$195,713 - $262,500 / year •Flexible work environment (work from home / hybrid options) •Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!