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Salary
≈ $115k – $216k per year (Estimated)
Location
In office (Rio de Janeiro)
Seniority
Principal · 11+ years exp

Confirmed on the employer's own hiring board on Oct 25, 2026. First seen by Alion on Oct 20, 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.  

What You’ll Do

  • Lead facilities and construction projects from requirements through completion, serving as the liaison between leadership, program teams, and customers.
  • Act as the primary facilities contact between customers and maintenance for building and machinery projects.
  • Gather and finalize requirements, including facility or equipment specifications, company and government restrictions, required completion dates, and construction feasibility.
  • Plan, design, and oversee the reconfiguration, maintenance, and alteration of equipment, machinery, buildings, structures, and other facilities.
  • Coordinate with architecture and engineering firms on design criteria, layouts, and detail drawings.
  • Prepare Scopes of Work and supporting documents to procure design and construction services.
  • Review and estimate costs across design, equipment, installation, labor, materials, and construction.
  • Inspect, or direct the inspection of, construction and installation progress to confirm conformance with drawings, specifications, and schedules. Identify tasks that require special inspection and coordinate them with customers and contractors.
  • Manage and execute multiple facilities projects at the same time in a fast-paced environment.
  • Forecast and report project status, including key Risk, Cost, and Schedule metrics.
  • Develop and implement risk mitigation and schedule recovery plans as needed.

Basic Qualifications (Levels 3 and 4)

  • Working knowledge of construction-related disciplines, with the ability to communicate technical approaches and findings clearly.
  • Ability to work with subject matter experts and suppliers to quickly troubleshoot issues with mechanical systems, machines, and material assemblies.
  • Experience preparing Scopes of Work and supporting documents to procure design and construction services.
  • Prior experience in facility layout, engineering, electrical, mechanical, HVAC design, plumbing, hydraulics, dynamics, and/or control systems, along with project management.
  • Ability to independently manage multiple construction projects.

Additional Basic Qualifications: Level 3 (Principal)

  • Facilities construction project management experience of at least 8 years with a high school diploma or GED, 5 years with a Bachelor’s degree, or 3 years with a Master’s degree.

Additional Basic Qualifications: Level 4 (Senior Principal)

  • Combined project management or facilities construction project management experience of at least 11 years with a high school diploma or GED, 8 years with a Bachelor’s degree, or 6 years with a Master’s degree.

Preferred Qualifications

  • PMP certification.
  • Degree in Construction Management, Construction Engineering Management or Civil Engineering.
  • Professional writing and presentation skills, with the ability to communicate with all levels of leadership.
  • Proficiency in Autodesk CAD or Revit.
  • Proficiency in Microsoft Project and Microsoft Office (Outlook, Excel, PowerPoint, and Word).
  • Experience with the design and construction of cleanrooms and classified facilities; fire and security alarm systems and remote monitoring; energy management systems; electrical systems, including high-voltage electricity and substations; and reliability engineering.
  • Knowledge of building codes, ADA, NFPA, UPC, UMC, Federal OSHA, and local, state, and federal regulatory requirements related to your area of responsibility.

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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