Construction Project Manager

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.

As Construction Project Manager, you will be responsible for planning and executing the build-out of new sites for Castelion. You will work closely with internal stakeholders, contractors, architects, and local authorities to ensure our facilities are delivered on time, within budget, and aligned with our mission needs. This role requires a high level of autonomy, field presence, and the ability to thrive in fast-moving, ambiguous environments.

• Lead all phases of construction projects—from initial planning and permitting through ground-breaking to commissioning and handover
• Develop and manage project schedules, budgets, and risk mitigation plans
• Work closely with leadership to translate program and engineering requirements into facility specifications
• Source and manage contractors, negotiate contracts, and oversee day-to-day execution
• Coordinate with local jurisdictions to secure necessary permits and approvals
• Ensure compliance with applicable building codes, safety regulations, and environmental standards
• Provide regular reporting on progress, cost, and key milestones to leadership
• Travel as needed to support active and upcoming site development projects

• 5+ years of experience in construction project management or site development
• Proven ability to lead fast-paced, ground-up construction or expansion projects
• Strong working knowledge of construction methods, contracts, permitting, and project controls
• Comfortable managing multiple stakeholders and shifting priorities with minimal oversight
• Excellent communication and negotiation skills
• Ability and willingness to travel regularly between project sites

• Experience supporting aerospace, defense, R&D, or industrial infrastructure projects
• Familiarity with environmental permitting or DoD compliance requirements
• Bachelor's degree in Construction Management, Civil Engineering, or a related field

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, 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.

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,…