Senior Manager - Cybersecurity Operations

About the role

Why Castelion, Why Now Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus and technical excellence are decisive advantages - and we are building a team that can deliver real capability, not just concepts. This is a rare opportunity to join at an early stage, where your work will directly shape critical systems, influence major technical decisions, and have immediate, real-world impact.

Senior Manager – Cybersecurity Operations We are seeking an experienced Senior Manager – Cybersecurity Operations to join our cybersecurity operations team at Castelion. This critical role will lead defensive security operations, incident response, and threat monitoring, protecting our information systems, intellectual property, product development security, and critical infrastructure from common threat vectors as well as advanced persistent threats (APTs) and nation-state actors. The ideal candidate will envision security to remain a business enabler and not a blocker, have deep expertise in defensive security operations, SOC leadership, proactive threat hunting, SIEM & SOAR, and incident response within highly regulated environments. Brings a practical, and up-to-date relevant technical understanding of protocols, encryption levels, patch levels, policy & procedure, etc., that are secure in the modern cybersecurity landscape.

What We're Looking For A proactive security professional who sees audits