Materials and Process Engineer, Impregnation

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability.

This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.

Castelion is seeking a highly motivated recent graduate or early-career engineer to support R&D development and scale-up of our ceramic matrix composite (CMC) prepreg and impregnation processes. This role will support production of the composite feedstock used to manufacture high-performance thermal protection system (TPS) components.

The position is ideal for a recent graduate interested in composite materials, slurry and resin processing, and scaling manufacturing processes for high-performance aerospace materials. The engineer will perform hands‑on prepreg manufacturing while supporting process development, characterization, and production scale‑up. Key processes include slurry preparation, fiber impregnation, solvent removal, prepreg handling, and continuous material processing.

The engineer will characterize raw materials and prepreg, own process data collection and analysis, and drive improvements in material consistency, process repeatability, and manufacturing readiness across the pilot line.

• Support slurry preparation, fiber impregnation, and prepreg manufacturing operations.
• Develop and optimize impregnation parameters to control fiber content, resin/slurry loading, and material uniformity.
• Own process QA data collection, analysis, and database management.
• Characterize raw materials and prepreg to assess quality and guide process development.
• Develop and optimize slurry and impregnation processes to improve material consistency and process repeatability.
• Develop and maintain process documentation, work instructions, and standardized operating procedures.
• Support installation, maintenance, and scale‑up of prepreg manufacturing hardware.

• Bachelor's or Master's degree in Materials Science, Chemical Engineering, Mechanical Engineering, Chemistry, or related field.
• Familiarity with composite processing, polymer/slurry processing, and/or materials characterization techniques.
• Must be willing to work weekends when necessary.
• Ability to work independently in a hands‑on engineering environment.

Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details.

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

This position may require access to classified information or restricted U.S. Government sites, systems, and information, as determined by the Company and/or applicable U.S. Government requirements. If the position is so designated, your employment in the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility requirements imposed by applicable law, regulation, executive order, or government contract requirements.

You will be notified if and when such requirements apply.

Castelion is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.

Castelion is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require a reasonable accommodation to complete an application, participate in the interview process, or otherwise participate in the hiring process, please contact  Requests for…