Global Supply 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 a Global Supply Manager, you will serve as one of Castelion’s highest-level individual contributors in Purchasing and Strategic Sourcing. You will shape and execute enterprise-wide, multi-program supply strategies across global markets and commodities, influencing the supplier ecosystem that enables rapid development, production scale, and long-term competitive advantage.

You will bring exceptional depth in at least one defense-related purchasing commodity—such as avionics, machined/metallic parts, composites/special materials, hardware, chemicals, or a similar category—and the breadth to lead complex work across commodities. You will operate as a trusted advisor to executives and technical leaders, lead the most consequential supplier and commercial decisions, and drive results through influence rather than direct people management.

This role sets the standard for strategic judgment, technical credibility, negotiation excellence, and end-to-end ownership at the individual-contributor level.

• Own enterprise and multi-program supply strategies for critical commodities, technologies, suppliers, and supply-chain capabilities from early development through sustained production.
• Serve as a recognized authority in at least one core defense purchasing commodity—avionics; machined/metallic parts; composites/special materials; hardware; chemicals; or a similar category—while leading cross-commodity initiatives as business needs require.
• Assess global supply markets, supplier ecosystems, manufacturing technologies, geopolitical conditions, capacity, financial health, sub-tier dependencies, and total-cost drivers to inform executive decisions.
• Lead the most complex supplier selections, strategic negotiations, long-term agreements, capacity reservations, tooling investments, make/buy analyses, and commercial escalations.
• Create durable competitive advantage through supplier innovation, design-to-cost, standardization, strategic partnerships, alternate technologies, localization or regionalization strategies, and total-cost optimization.
• Partner with senior engineering, program, quality, manufacturing, finance, legal, security, and executive stakeholders to resolve high-impact tradeoffs involving cost, schedule, quality, technical performance, capacity, and risk.
• Lead enterprise supplier-performance and recovery strategies for critical suppliers; establish executive-level operating rhythms and drive sustained corrective action.
• Own the most significant supply-chain risk and continuity plans, including sole/single-source exposure, long-lead technologies, constrained capacity, geopolitical disruption, sanctions, export controls, financial distress, and sub-tier concentration.
• Set standards for sourcing governance, decision quality, supplier engagement, commercial discipline, and documentation; influence roadmap and investment decisions with fact-based analysis.
• Identify and execute cross-program leverage while protecting program-specific requirements, intellectual property, configuration control, security, and mission assurance.
• Represent Castelion with strategic suppliers and industry partners; build relationships that improve…