The stated compensation range reflects only the targeted base salary range and excludes additional benefits. If your salary requirements fall outside of the range, we still encourage you to apply.

Spacecraft represent the most pressing unmet need across the entire aerospace industry. As more launch vehicles come online and the cost to orbit decreases, more companies launching payloads to space continue to emerge.

For the first time in history, this influx of payload companies combined with reduced launch costs has resulted in a massive increase in need for commercial spacecraft platforms, known as satellite buses. These buses hold the payloads of our customers and are flown on launch vehicles.

Apex manufactures these satellite buses at scale using a combination of software, vertical integration, and hardware that is designed for manufacturing. Our spacecraft enable the future of society: ranging from earth observation to communications and more.

We’d love for you to join us on our mission of providing humankind access to the galaxy beyond our planet.

About the Role

As the lead Radiation Effects engineer, you will serve as a point of contact for all technical topics related to space environment qualification and design, and meet team members' needs, customer requirements, and company goals. In this unique role, you will serve as Apex’s technical authority for spacecraft electronics radiation susceptibility with the responsibility of hardening reliable space systems. This position requires deep technical expertise in radiation effects testing and analysis. You will collaborate across design, manufacturing, systems, and mission assurance disciplines to ensure spacecraft meet reliability, availability, and life requirements. You are responsible for enforcing the Radiation Hardness Assurance for our various buses, products, and individual components. You will coordinate closely with all product designers to continually evolve, test, and maintain a radiation parts and materials library. You will also provide radiation analysis capabilities to ensure spacecraft shielding and electronics design is adequate for compliance with harsh environments ranging from LEO to GEO.

Responsibilities

· Establish and own the radiation engineering processes and provide cross-discipline training to instill a culture of survivability-awareness across the company.

· Supervise and operate radiation test equipment, including total dose sources and pulsed laser equipment.

· Provide radiation-tolerant recommendations to product designers to increase the probability of mission success through part selection, circuit design, passive/active radiation mitigations, and mission design recommendations.

· Support business development and mission integration efforts by contributing to proposals, requirements development, customer briefings, and design reviews (SRR, PDR, CDR) with radiation assessments.

· Develop cumulative (total dose, displacement damage) and single event effects models for any orbital regime using industry standard tools and best practices.

· Own the budget, schedule, plan, and execution of radiation test campaigns at external facilities (protons, heavy ions, gamma, neutron) or through third-party partners.

· Provide unit and mission level radiation analyses, including SEE rates, availability estimates, cumulative dose exposure,s and the associated artifacts for requirements verification.

· Maintain and grow the parts and materials library databases with critical piece-part and material information accessible to all designers.

Basic Qualifications

· B.S. in Electrical Engineering, Physics, Nuclear Engineering, or related field

· 5–10 years of experience in radiation effects and/or reliability engineering for aerospace systems

· Expertise with radiation tools (e.g., AE9/AP9/SPM, CREME96, OMERE, SPENVIS) for environmental definition and requirements definition.

· Familiarity with industry radiation standards (e.g. MIL-STD-750, MIL-STD-883, ECSS-Q-ST-60-15C, MIL-STD-3053 and NASA testing guidelines).

· Extensive experience with budgeting, scheduling, and executing SEE, TID, and DDD test campaigns, including test evaluation hardware/kit development, and familiar with testing FPGAs and microprocessors.

· Proficiency with data analysis and modeling software (Python, MATLAB, or equivalent).

· Familiarity with circuit simulation tools (e.g., LTSpice) with experience in design and/or analysis of digital and analog circuits.

· Strong lab experience with oscilloscopes, logic analyzers, source meters, power supplies, and automating data collection.

· Effective communication skills, with the ability to clearly convey radiation risks and mitigation to diverse stakeholders

Preferred Skills and Experience

· 10+ years of experience in radiation engineering roles

· M.S. or Ph.D. in Electrical Engineering, Physics, Reliability Engineering, or related field.

· Active U.S. Government security clearance

· Hands-on experience with scripting, automation, and programming languages (Python, MATLAB, JMP, C/C++, SQL, etc.).

· Previous startup or small-team experience with demonstrated ability to take initiative, establish processes, and thrive in ambiguity.

· Familiarity with radiation transport and shielding analysis tools (FASTRAD).

· Familiarity with space charging effects on materials and electronics.

· Experience with anomaly resolution and documentation of anomaly reports and lessons learned databases

· Experience with pulsed laser single event effects testing

· Experience with prompt dose hardening processes, including flash X-ray testing, EMP protection measures, and Faraday cage design

· Ability to obtain TS/SCI clearance

Why Join Apex?

Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We're a fast-growing startup backed by $200M in Series D funding, and we invest heavily in our people from day one.

What We Offer For Full-time Employees:

• Shared upside: Receive equity in Apex, letting you benefit from the work you create

• Best-in-class healthcare: 100% company-paid medical, dental, and vision for you and your dependents, plus $100k life insurance at no cost

• Comprehensive PTO package to reset and recharge - starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidays

• Competitive 401(k) plan with generous matching - 100% match on first 3%, 50% on next 2%

• 8 weeks paid parental leave plus childcare reimbursement up to $350/day for work-related travel

• Daily catered lunch and unlimited snacks to keep you fueled throughout the day

• Vibrant community: Monthly office BBQs, pickleball tournaments, run club, and social gatherings for you and your family

• Your dream desk setup and all the tools you need to be your most productive self

• World-class Playa Vista office with EV chargers, with the benefit of in-person collaboration with amazing coworkers and flexibility to integrate work and life

• Real impact opportunity: Work alongside experts from aerospace, new space, and other cutting-edge industries to make a lasting difference

Ready to join a team where your contributions matter and your future is bright? Let's build something extraordinary together.

Equal Opportunity Employer

Apex Technology, Inc. is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Candidates and employees are always evaluated based on merit, qualifications, and performance. We will never discriminate on the basis of race, color, gender, national origin, ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.

Compensation Range: $125K - $155K