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Salary
≈ $26k – $61k per year (Estimated)
Location
In office (Rio de Janeiro)
Seniority
Senior · 5+ years exp

Confirmed on the employer's own hiring board on Oct 24, 2026. First seen by Alion on Sep 24, 2026.

Overview
Company
Impact
Profile match
Castelion designs, tests, and manufactures next-generation military systems rapidly and at massive scale to deter future wars.

Why Castelion, Why Now 

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.  

Assembly and Integration Technician

Castelion is seeking an Assembly & Integration Technician to support the assembly, integration, and testing of complex aerospace and defense hardware. In this role, you will work closely with manufacturing, engineering, quality, and test teams to build and integrate mechanical and electromechanical assemblies in accordance with engineering drawings, work instructions, and quality requirements.

Responsibilities

  • Hands-on component and subassembly development, assembly, and test
  • Reading and understanding electrical schematics, drawings, and ICDs
  • Following assembly procedures; record results and discrepancies
  • Working in clean room to assemble hardware
  • Operating flight hardware qualification test equipment (e.g., Thermal, Vibration, standard lab power supplies)
  • Incoming inspection and data collection on components
  • Data verification, collection, and organization (component COC/COA/Travelers)
  • Ability and willingness to perform moderate physical tasks, such as lifting, carrying, bending, continuous standing
  • Performing other various tasks, including, but not limited to: cleaning and maintaining laboratory equipment, ordering and picking up supplies
  • Assisting engineers and other technicians
  • Performing all other duties as assigned
  • Serve as a mentor and technical lead for junior assembly and integration technicians, guiding their professional development and technical skills
  • Direct daily activities and manage workloads across production cells while maintaining a hands-on presence as a working lead technician

Basic Qualifications

  • Associates degree and three (3) years of experience as a technician, or high school and five (5) years of experience as a technician
  • Demonstrated experience assembling flight hardware
  • Demonstrated knowledge and experience with ESD fundamentals is required
  • Demonstrated ability to accurately read drawings, and assembly procedures, and other related documentation
  • Experience interpreting assembly drawings
  • Experience mixing and applying epoxies and adhesives
  • Some travel may be required
  • Potential for supporting extended work weeks during some phases of assembly, integration and test, as necessary
  • Ability to lift up to 40 lbs and work around industrial equipment
  • Ability to wear required PPE, climb ladders, and work in a manufacturing environment
  • Ability to obtain and maintain a U.S. DoD clearance

Preferred Skills and Experience

  • Strong interpersonal skills
  • J-STD-001 Certification
  • IPC-620 Certification
  • IPC-A-610 Certification
  • Strong attention to detail while following procedures and documenting necessary data
  • Good written and verbal communication skills
  • Demonstrated ability to work in a fast-paced environment
  • Demonstrated capability as very detail oriented

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

Other Duties 

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. 

Additional Eligibility Requirements 

This position may require access to classified information or restricted U.S. Government sites, systems, or 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. 

Affirmative Action/EEO Statement 

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 [email protected]. Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law. 

Castelion is committed to fostering a workplace where employment decisions are based on qualifications, business needs, and the ability to perform the essential functions of the role, with or without reasonable accommodation. 

EAR/ITAR Requirements 

This position requires access to export-controlled information, and as such, employment (or hiring of a contractor) is contingent upon the candidate’s ability to access all applicable export-controlled information without additional export licensing being required by the Bureau of Industry and Security and/or the Directorate of Defense Trade Controls. 

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