Demo

Senior Supply Chain Planner

Castelion
Torrance, CA Full Time
POSTED ON 4/8/2026
AVAILABLE BEFORE 5/6/2026

About Castelion

Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.


Senior Supply Chain Planner

As the Senior Supply Chain Planner, you will be integral in working with the cross-functional groups defining, designing, building, and testing Castelion vehicle and missile subsystems. This role requires an established supply chain professional with breadth to engage with engineering to execute the necessary program sourcing strategies to align with short term development schedules and long-term sourcing focus for low cost, sustainable supply chain plans. We seek intelligent, collaborative, and driven leaders who are passionate about problem-solving and eager to lay the groundwork for a team to contribute to an extraordinary mission. If you thrive in challenging environments and are excited by the prospect of making a tangible impact, we want to hear from you.


Responsibilities

  • Support the development and execution of production strategies, working with the strategic sourcing, engineering and program teams to ensure reliable supply for upcoming product launches.
  • Assist in evaluating and selecting supply plans based on quality, reliability, and cost-effectiveness to maintain a robust supply base capable of Castelion's rapid development and production.
  • Load and report on supply plans based on a master schedule set in a Material Requirements Planning engine.
  • Collaborate with key stakeholders to improve quality, reduce costs, and enhance service levels while addressing risks and compliance requirements.
  • Forecast spend, supply, and infrastructure requirements through close collaboration with business stakeholders and operations plans.
  • Collaborate with engineering and quality teams to address and resolve issues with rejected materials, aiming to prevent future quality problems.
  • Provide regular updates to key stakeholders on critical supply issues through Clear to Builds.
  • Support onboarding and training of new planners.
  • Ensure adherence to company policies, procedures, and relevant government regulations.


Basic Qualifications

  • 5 years of experience working in a related field, program, or project
  • Bachelor's degree or equivalent


Preferred Skills and Experience

  • System Experience: Experience with MRP or ERP systems, and with managing bill of materials, work orders, and purchase orders, and the total ownership of the data within them.
  • Technical Skills: This role requires broad mechanical domain knowledge, including machined parts, composites, chemicals, avionics and their associated manufacturers and manufacturing methods.
  • Problem-Solving: Innovative problem-solving approach using critical thinking, including utilization of learnings from an American Production and Inventory Control Society (APICS) certification, Six Sigma certification, or similar certifications and data analysis using Excel, SQL, or an advanced analytics software.
  • Clearance: Active US Government security clearance or the ability to obtain and maintain one.


Leadership Qualities

  • Bias to Action and Creative Problem Solving. Desire and experience questioning assumptions in ways that lead to break through ideas that are ultimately implemented. Successfully bring in applicable processes/concepts/materials from other industries to achieve efficiency gains. Ability to personally resolve minor issues in development without requiring significant support.
  • High Commitment, High Initiative. A successful candidate will have a genuine passion for Castelion's mission and consistently look for ways to contribute to the company's technical goals and prevent hardware blockers. Ability to work in a fast paced, autonomously driven, and demanding atmosphere. Strong sense of accountability and integrity.
  • Clear Communicator. Proactively communicates blockers. Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers. Capable of tactfully managing relationships with stakeholders to achieve company-desired outcomes without compromising relationships. Emails, IMs and verbal interactions are logical, drive clarity, and detailed enough to eliminate ambiguity.


ITAR Requirements

  • To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.


Employment with Castelion is governed on the basis of competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.


All employees are granted long-term stock incentives as part of their employment at Castelion. All employees receive access to comprehensive medical, vision, and dental insurance, and the company offers four weeks of paid time off per year.

Salary : $115,000 - $150,000

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