Job Description

Apex is seeking a Thermal Engineer to design, analyze, and optimize spacecraft thermal systems. You will work cross-functionally to develop thermal solutions for avionics, electro-mechanical systems, and spacecraft structures while focusing on reducing the cost and complexity of traditional satellite thermal subsystems. This position requires expertise in thermal modeling, testing, and hardware integration to ensure mission success. Responsibilities Develop and maintain spacecraft-level thermal models using Ansys Thermal Desktop and other analytical tools. Collaborate with subsystem engineers to design and optimize thermal control systems for avionics and electro-mechanical components. Evaluate the validity of thermal analysis results and ensure compliance with Mil-Standard, Aerospace TOR, and vendor requirements. Plan, execute, and manage thermal testing campaigns, including thermal vacuum (TVAC) and thermal cycling tests. Work with mechanical teams to develop passive and active thermal management hardware, including radiators, heaters, heat pipes, and coatings. Support thermal subsystem milestone reviews (SRR, PDR, CDR, MRR). Perform thermal model correlation using flight and test data. Oversee thermal flight hardware integration and quality control. Utilize Siemens NX and Teamcenter for thermal design and integration. Requirements 3+ years of experience in radiative and conductive thermal modeling of spacecraft systems using Thermal Desktop or similar software. Strong understanding of thermal margin definitions and aerospace thermal control standards. Experience selecting, sizing, and designing thermal control hardware, including heat pipes, heaters, OSR, SSM, MLI, TEC, thermal paints, and tapes. 1+ year of experience with thermal cycling and thermal vacuum testing, including setup, instrumentation, and model correlation. Preferred Qualifications Experience with full-vehicle thermal vacuum testing and thermal model correlation. Familiarity with 2-phase spacecraft thermal control systems. Knowledge of PCBA thermal modeling and thermal interface materials (thermal grease, gap pads, etc.). Experience with integrated spacecraft and launch vehicle thermal analysis. Proficiency in Python, C/C++, or Matlab for thermal modeling and automation. Understanding of SMC-S016 standards or equivalent. Familiarity with Atlassian software tools and engineering workflows. Salary Salary Range: $125,000 - $150,000 base. 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. Benefits Apex believes in creating a work environment that you look forward to embracing every day. We offer the following benefits: 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: Starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidays Competitive 401(k) plan: 100% match on the first 3%, 50% on the 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, plus in-person collaboration with coworkers and work-life flexibility Real impact opportunity: Work alongside aerospace and cutting-edge industries to make a lasting difference 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. We evaluate candidates and employees based on merit, qualifications, and performance, and we do not discriminate on race, color, gender, national origin, ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, or any other legally protected status. Why Join Apex? Apex is a fast-growing startup backed by $200M in Series C funding. We invest in our people from day one and provide opportunities to make a real impact in the aerospace industry. What We Offer Shared upside: Equity in Apex to 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 Comprehensive PTO: Starting at 15 days, increasing to 20+ days plus 10 paid holidays Competitive 401(k): Generous matching 8 weeks paid parental leave and childcare reimbursement up to $350/day Daily catered lunch and unlimited snacks Vibrant community with regular events Your dream desk setup and tools for productivity World-class Playa Vista office with resources to support collaboration and work-life balance Real impact opportunity to work with aerospace and cutting-edge industries 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. We evaluate candidates and employees based on merit, qualifications, and performance, and we do not 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. #J-18808-Ljbffr Apex Technology, Inc.

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