Contracts Manager

Why Castelion, Why Now

Castelion is bringing a new approach to defense development and production, focused on rapid iteration, frequent testing, vertical integration, and modern manufacturing strategies for production  design, build, test, and produce next‑generation long‑range strike systems to strengthen America’s deterrence and give the United States and its Allies a decisive advantage.

Castelion is moving quickly from development into production and operational fielding. As our portfolio of U.S. Government programs continues to grow, we are seeking a Contracts Manager to help execute and administer these efforts at the speed required by the mission.

The Contracts Manager will be a key member of Castelion’s Government Programs organization and will be responsible for contract administration and execution across a portfolio of U.S. Government contracts and agreements.

This individual will work directly with program managers, business development, finance, legal, engineering, and government contracting counterparts to ensure Castelion understands and meets its contractual obligations while enabling programs to execute quickly and effectively.

The ideal candidate has strong working knowledge of U.S. Government contracting, can independently interpret contractual requirements, and is comfortable taking ownership of complex contract actions from proposal through negotiation, award, performance, modification, and closeout. This role requires someone who can balance sound contracting judgment and compliance with Castelion’s bias toward speed, simplicity, and execution.

• Own contract administration across multiple U.S. Government programs from award through contract completion and closeout
• Serve as a primary contractual interface with Government Contracting Officers, Contract Specialists, DCMA personnel, and other acquisition stakeholders
• Partner closely with program managers to understand contractual requirements, milestones, deliverables, funding, and performance obligations and ensure successful execution
• Review and negotiate U.S. Government contracts, Other Transaction Agreements (OTAs), modifications, task orders, delivery orders, and related agreements
• Review Requests for Proposal (RFPs), Requests for Information (RFIs), solicitations, and draft contractual documents to identify requirements, risks, and business implications
• Coordinate proposal preparation and submission across program management, engineering, finance, legal, supply chain, and business development
• Develop and maintain proposal compliance matrices, contractual assumptions, exceptions, representations and certifications, and other business volumes
• Review and interpret contract terms, FAR and DFARS clauses, statements of work, CDRLs, data rights requirements, invoicing requirements, and other contractual obligations
• Lead the preparation and negotiation of contract modifications, requests for equitable adjustment, funding actions, schedule changes, and other contract actions
• Track contract funding, ceilings, CLINs, period of performance, deliverables, options, and other key contractual milestones
• Coordinate with finance and program teams to ensure accurate and timely invoicing, payment, and funding management
• Establish and maintain complete, accurate, and audit‑ready contract files and correspondence
• Support contract compliance activities, Government reviews, audits, and interactions with DCMA, DCAA, and other Government organizations as applicable
• Support negotiation and administration of non‑disclosure agreements, teaming agreements, subcontracts, and supplier agreements when required
• Partner with legal counsel on complex regulatory, intellectual property, data rights, export control, disputes, and other legal matters
• Develop scalable contracting processes, templates, tools, and playbooks that enable Castelion to manage an expanding portfolio of Government programs without unnecessary bureaucracy
• Identify contractual risks early, develop practical mitigation strategies, and drive issues to resolution rather than simply identifying them
• Establish and maintain strong, trusted relationships with Government customers…