Financial Planning and Analysis Manager

This range is provided by Castelion. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

$/yr - $/yr

Stock options

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 ’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.

FP&A Manager

We’re seeking a highly analytical, execution-focused FP&A Manager to join our lean, high-impact team. In this role, you will own financial planning and visibility across a rapidly scaling defense hardware company. You’ll lead budgeting, forecasting, and performance management processes that enable fast, confident decisions by our leadership and engineering teams.

This is not a “sit-back-and-report” role - you will build systems, models, and processes from the ground up. We’re looking for someone who can dive deep, operate with incomplete information, and help shape the financial backbone of a company growing at extreme velocity.

• Own the company-wide budgeting, forecasting, and long-range planning processes
• Build, refine, and maintain detailed financial models to inform strategic decision-making
• Manage monthly performance reviews, variance analysis, and reporting for leadership
• Partner directly with engineering, operations, supply chain, and program management to track spend vs plan, headcount forecasts, program budgets, and capital allocation
• Lead financial inputs for proposals, pricing models, and new customer opportunities
• Prepare materials for board meetings, investor updates, and internal operating reviews
• Design and implement scalable FP&A tools, dashboards, and processes as the company grows
• Mentor and guide junior team members and build the foundations of a future FP&A organization

• 4+ years of experience in FP&A, investment banking, management consulting, corporate finance, or similar roles
• (experience in aerospace/defense, manufacturing, or high-growth startups strongly preferred)
• Advanced financial modeling skills and strong command of Excel; experience with ERP/BI systems a plus
• Proven ability to work cross-functionally, gather inputs, pressure-test assumptions, and drive clarity
• High level of ownership, urgency, and comfort operating in a fast-changing environment
• Ability to distill complex technical and financial information into clear, actionable insights for leadership

• Direct experience with government proposals, DoD cost structures, or government contract pricing (e.g., FFP, T&M)
• Exposure to early-stage, vertically integrated manufacturing environments
• Interest in or passion for national security, aerospace, and building hardware that matters

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

Bias to Action and Creative Problem Solving
. Desire and experience questioning assumptions in ways that lead to breakthrough 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…