Apply on Employer Site

Castelion · 18 hours ago

Senior Mechanical Design Engineer

Torrance, CA

Full-time

Onsite

Senior Level

$130K/yr - $185K/yr

5+ years exp

Castelion is bringing a new approach to defense development and production, focusing on iterative design cycles and rapid testing. They are seeking a Senior Mechanical Design Engineer to lead the design and build efforts for hypersonic vehicles, ensuring mission-critical hardware is delivered on time and meets technical performance standards.

AerospaceGovernmentManufacturingMilitaryNational Security

No H1B

U.S. Citizen Only

Hiring 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

Mechanical EngineeringCAD DesignFlight-Ready HardwareThermal AnalysisStructural AnalysisFull Cycle DevelopmentCreative Problem SolvingClear CommunicationHigh Initiative

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

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