AIS’s Subsidiary GreyCastle Security Acquired by DeepSeas

AIS is proud to announce that its subsidiary, GreyCastle Security, has been acquired by DeepSeas. GreyCastle Security, a leading provider of comprehensive cybersecurity services will now operate under the DeepSeas name. DeepSeas is a market leader in managed detection and response (MDR) for both enterprises and mid-market organizations.

“As the majority owner of GreyCastle Security, we’re excited to have facilitated this strategic acquisition with DeepSeas,” said Charles Green, Chief Executive Officer (CEO) of AIS. “This move not only underscores our commitment to enhancing the capabilities of our portfolio of companies, but also positions GreyCastle Security’s people and offerings for continued growth and success in the dynamic cybersecurity market.”

DeepSeas, a Gartner Top 40 provider of MDR and recognized as being the most innovative MDR by Frost & Sullivan, will leverage the value of GreyCastle Security’s expertise and client-centric approach to bolster its professional services. The strategic acquisition will further enhance services in the DeepSeas framework, particularly in the areas of audit readiness, CISO advisory services and Incident Response (IR) preparedness. GreyCastle Security’s key offerings and personnel are transitioning to DeepSeas.

“The team at GreyCastle Security is an ideal complement to the DeepSeas organization in terms of their culture, skills and offerings,” said Chris Esemplare, CEO of DeepSeas. “This acquisition is another foundational building block supporting our strategic growth plans.”

The joint efforts of GreyCastle Security and DeepSeas will result in a unified approach to addressing the evolving cybersecurity challenges faced by enterprise and mid-market clients across various industries.

“I’m thrilled to witness the culmination of a strategic vision that will undoubtedly propel both organizations to new heights,” said Dan Kalil, who served as Chairman and CEO of GreyCastle Security and will now take on an executive role with DeepSeas. “This acquisition showcases the strength of our offerings as well as the commitment of AIS to fostering growth within its ecosystem. Now with DeepSeas, I look forward to charting new territories in cybersecurity excellence.”

About DeepSeas

With more than 30 years of experience in cyber defense, DeepSeas is trusted by 700 clients, including Fortune 100 enterprises and mid-market organizations. Leveraging deep expertise that combines world-class cyber threat detection and response with industry-leading analysts, tailored threat intelligence and accredited incident responders, DeepSeas is always on, always watching. With its MDR+ offering, DeepSeas is the first and only MDR solution that covers the entire converged attack surface.

Learn more at

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