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Senior Manufacturing Engineer - Machining

Castelion — Tracked from its manatal job board

Torrance, California, United States Senior+ Posted Aug 2, 2026
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About the role

About Castelion

Castelion is bringing a new approach to defense
development and production: one that focuses on short, iterative design cycles,
rapid testing in development, and modern commercial manufacturing strategies
for production at scale. We're designing, building, and testing next generation
long range strike weapons systems to give America and its Allies a definitive
edge and deter future conflicts.

Senior Manufacturing Engineer - Machining

Castelion is seeking an expert in the machining and design of complex mechanisms for our in-house hypersonic vehicle development. This role will work closely with design engineering and technician teams to build and execute on testing and validation efforts to keep pace with the research and development timetable of our products. You will be apart of a team responsible for serving as a critical node in implementing feedback from testing and validation efforts, streamlining designs and implementing manufacturing changes to quickly mature our products for flight testing and production. Desire for product and process ownership is a must in this role.

Key Responsibilities
Work with component design engineering teams to determine the manufacturing and testing feasibility of product
Operate as a
standalone resource responsible for a family of mechanisms
Architect,
mature and develop testing and validation procedures for a wide array of
complex mechanisms
Generate
concept proposals in alignment with R&D efforts to help attribute
requirements gathering
Down select
solutions generated based on quantifiable vehicle attributes, system cost and
weight
Propose and
defend solutions in engineering review meetings
Develop and
refine process documentation including build instructions, test and validation
procedures, health and safety standards, and mBOMs
Create,
maintain, and communicate detailed production plans and schedules
Work closely
with supply chain to develop new and existing suppliers as needed
Design,
develop and implement production tooling and equipment
Participate in
design reviews to drive design for manufacturing (DFM)
Oversee
introduction and implementation of new products and manufacturing capabilities
Analyze and
resolve manufacturing issues and non-conformances
Develop,
mentor, and train peers and colleagues  

Basic Qualifications

Bachelors
degree in mechanical, aerospace, or manufacturing engineering, or other
technical degree.
5+
years of mechanisms manufacturing, testing and validation experience
Experience
with operations/product line management
Demonstrated
direct or indirect leadership
Proficiency
in CAD/CAM software (NX preferred)
Experience
in selection, procurement, and implementation/validation of manufacturing
equipment

Preferred Qualifications

Experience
in mechanisms design, testing and validation from high volume production
environments
Experience
developing comprehensive testing and validation procedures and the required
documentation processes
Experience
in qualification and acceptance testing of complex aerospace mechanisms
Working
experience with capacity modeling, process mapping, Lean/Six Sigma and value
stream mapping
Experience
in transitioning development processes to rate production 

Leadership Qualities

Bias to Action
and Creative Problem Solving. Desire and experience questioning assumptions in
ways that lead to break through 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.

High
Commitment, High Initiative. A successful candidate will have 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.

Clear
Communicator. 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.

ITAR Requirements

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.

Employment with Castelion is governed on the basis of
competence and qualifications and will not be influenced in any manner by race,
color, religion, 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.

All employees are granted long-term stock incentives
as part of their employment at Castelion. All employees receive access to
comprehensive medical, vision, and dental insurance, and the company offers
four weeks of paid time off per year.

What the index says about this role

  • First seen by JobLarper — Aug 2, 2026, 5 days ago. Older postings collect hundreds of applicants — a tailored résumé matters more the longer a role has been live.
  • Castelion is hiring actively — 98 open roles indexed.

Derived from the 27,000 roles JobLarper indexes daily from official company boards — not from the job description above.

⚡ JobLarper watched this role appear on Castelion's official board on Aug 2, 2026. Sign up free to get alerted minutes after roles like this go live, and tailor your real résumé to the exact description — nothing invented.

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