Castelion · 3 hours ago
Senior Structures Design Engineer
Torrance, CA
Full-time
Onsite
Senior Level
$130K/yr - $185K/yr
5+ years expCastelion is innovating in defense development and production, focusing on rapid design cycles and modern manufacturing strategies. They are seeking a Senior Structures Design Engineer to lead the design and integration of critical flight structures for hypersonic vehicles, ensuring timely delivery and high performance in a fast-paced environment.
AerospaceGovernmentManufacturingMilitaryNational Security
No H1B
U.S. Citizen OnlyHiring Manager
Nicholas Sparks
Responsibilities
Design and Deliver Mission-Critical Hardware - Lead the design, build, and integration of key flight vehicle components such as composite tanks, separation mechanisms, actuators, and control surfaces. Own your systems from concept to flight. Apply fundamentals in statics, dynamics, and modal analysis to justify designs—and prove them in test and flight
Drive High-Cadence Design Iteration - Support iterative prototyping cycles every four weeks for key subsystems. Engage in cross-functional design reviews, integrate test feedback rapidly, and evolve hardware through fast-paced learning loops
Build and Maintain Engineering Rigor - Contribute to the development of engineering best practices at Castelion, including CAD standards, documentation practices, and hardware management protocols. Write build documentation and collaborate hands-on with technicians during integration and assembly
Qualification
Required
Bachelor's degree in Mechanical Engineering with 5+ years of professional ME experience
Broad mechanical domain knowledge, including detailed CAD design of complex parts, tolerance stack up analysis, thermal analysis, structural analysis, and design-to-cost
Experience designing elegant, manufacturable components optimized for weight, cost, and simplicity; familiarity with coatings, finishes, and composite structures
Experience bringing hardware designs from initial concept to implementation, production, and successful operations
Ability to maximize speed and value from vendors for company goals during vendor visits or joint development efforts
Desire and experience questioning assumptions in ways that lead to breakthrough ideas that are ultimately implemented
Successfully bring in applicable processes/concepts/materials from other industries to achieve efficiency gains
Ability to personally resolve minor issues in development without requiring significant support
A genuine passion for Castelion's mission and consistently look for ways to contribute to the company's technical goals and prevent hardware blockers
Ability to work in a fast paced, autonomously driven, and demanding atmosphere
Strong sense of accountability and integrity
Proactively communicates blockers
Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers
Capable of tactfully managing relationships with stakeholders to achieve company-desired outcomes without compromising relationships
Emails, IMs and verbal interactions are logical, drive clarity, and detailed enough to eliminate ambiguity
To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State
Benefits
Long-term stock incentives
Comprehensive medial, vision, and dental insurance
Three weeks of paid time off per year
Company
Castelion
Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$469.61MKey Investors
Altimeter Capital,Lightspeed Venture PartnersLightspeed Venture PartnersSilicon Valley Bank
2025-12-05Series B· $350M
2025-01-29Series A· $70M
2025-01-29Debt Financing· $30M
Leadership Team
Bryon Hargis
Founder // CEO
Andrew Kreitz
Co-Founder and CFO
Recent News
alleywatch.com
2026-01-23
Company data provided by crunchbase