Castellan Defense

Castellan Defense builds security and compliance tooling for government contractors and defense-adjacent organizations operating under stringent federal frameworks. The product helps customers meet and document controls required for federal work, manage configurations against mandated baselines, and produce the evidence auditors require. The buyer is a security or compliance lead inside a contractor that must satisfy government standards to win and keep contracts.

Acquired as a majority position in 2020, Castellan serves several hundred contractors with revenue in a solid mid-band and retention strengthened by the regulatory necessity of its product. Demand tracks federal compliance requirements, which produces durable, contracted relationships and steady expansion as frameworks evolve.

Castellan consumes HR, Accounting, IT, and Legal under the Plus management-fee tier, with marketing coordinated through the broader cybersecurity group. Its Arlington base and federal focus complement Ironvale Security's commercial footprint, and the two share threat intelligence and detection patterns within the portfolio.

Forward focus is on keeping pace with evolving federal frameworks and extending its evidence-automation capabilities.