About the Role

We are supporting an international high-technology engineering organization developing advanced products and systems for demanding applications.

We are looking for a Composites Manufacturing Specialist Engineer to join its manufacturing engineering organization. The successful candidate will support the development, industrialization, qualification, and continuous improvement of composite materials and manufacturing processes, with a strong focus on prepreg technologies.

This position combines hands-on manufacturing engineering with materials and process expertise and will work closely with engineering, production, quality, supply chain, and external suppliers.

Key Responsibilities

- Develop and maintain engineering specifications for hand lay-up manufacturing processes for prepreg composite components.
- Define manufacturing routing sheets for prepreg parts in accordance with applicable engineering specifications.
- Establish, document, and control prepreg material handling requirements, including out-time tracking, storage conditions, material lot traceability, and shelf-life management.
- Lead and support new-part qualification activities, including definition of first-article build plans, preparation of process documentation, and support during qualification inspections.
- Develop, evaluate, and validate new composite manufacturing processes before their release to production, including lay-up configurations, cure cycles, and vacuum bagging techniques.
- Coordinate with new material and manufacturing process suppliers, establishing evaluation criteria, overseeing sample testing, and verifying compliance with applicable technical specifications.
- Support the introduction, transition,



and qualification of automated composite manufacturing technologies, particularly Automated Fiber Placement (AFP), including technical comparison and benchmarking against manual manufacturing processes.
- Define, update, and maintain routing sheets, work instructions, and manufacturing/process documentation for new and existing components and processes.
- Define ply kit requirements based on engineering ply books and established lay-up sequences.
- Provide engineering disposition and technical support for SCSRs and manufacturing non-conformances, including containment activities and corrective-action follow-up.
- Capture and document lessons learned from manufacturing and qualification activities.
- Update work instructions and process documentation as new components, manufacturing processes, materials, or suppliers are introduced and qualified.

Education

Bachelor's degree in a closely related engineering discipline:

Experience

- Minimum 3 years of professional experience in composite manufacturing, with the required level of experience depending on the seniority of the position.
- Practical knowledge of composite manufacturing processes and materials.
- Experience working with prepreg composite materials and manufacturing processes.
- Understanding of manufacturing documentation, engineering specifications, and process control.

Preferred Qualifications

- Master's degree in a relevant engineering discipline.




- Previous experience within the aerospace sector or another highly regulated, advanced engineering environment.

Technical Expertise

The adecuado candidate will have knowledge and/or hands-on experience in:

- Prepreg composite manufacturing
- Hand lay-up processes
- Composite material handling and control
- Prepreg out-time and shelf-life management
- Lay-up configurations and ply sequences
- Ply books and ply kit definition
- Vacuum bagging techniques
- Composite cure cycles
- Automated Fiber Placement (AFP)
- First Article and new-part qualification
- Manufacturing process development and validation
- Engineering specifications
- Manufacturing routing sheets
- Work instructions and process documentation
- Material and process supplier qualification
- Non-conformance evaluation and engineering disposition
- Corrective-action follow-up

Skills & Competencies

- Strong analytical and problem-solving skills.
- Excellent attention to detail, particularly when working with controlled manufacturing processes and technical documentation.
- Ability to collaborate effectively within cross-functional engineering and manufacturing teams.
- Strong written and verbal communication skills.
- Ability to manage multiple projects, technical activities, and priorities simultaneously.
- Structured and quality-oriented approach to manufacturing engineering.

Physical & Working Requirements

- Ability to work with composite materials and manufacturing processes in an engineering and production environment.
- Ability to use a computer for extended periods.
- Ability to review and work with manufacturing documentation, process instructions, and engineering specifications.

📌 Composites Manufacturing Specialist Engineer (Valladolid)
🏢 ISG International Service Group
📍 Valladolid