Halcyon Appoints Veteran Cybersecurity Executive Gary Hayslip as Senior Security Advisor

AUSTIN, Texas, Sept. 12, 2025 /PRNewswire/ -- Halcyon, the leading anti-ransomware solution provider, today announced the appointment of Gary Hayslip as Senior Security Advisor. With more than two decades of global cybersecurity leadership across government, enterprise, and investment sectors, Hayslip will support Halcyon's mission to help organizations strengthen resilience against ransomware, advising executives and security leaders on how to defend against today's most urgent cyber threat.

"Throughout my career I've watched ransomware evolve into a crisis that impacts every sector, from government to global enterprise. Halcyon has built a platform that gives defenders the upper hand, making it possible for companies to stop attacks and recover without paying a ransom. I'm thrilled to join this team and work with CISOs and boards to build true resilience." — Gary Hayslip, Senior Security Advisor, Halcyon.

Hayslip brings experience as a Global CISO, author, board advisor, and keynote speaker, having led security strategy for billion-dollar enterprises and government agencies. He most recently served as Global CISO at SoftBank Investment Advisers, where he conducted cybersecurity due diligence on more than 700 companies and oversaw security for a $200 billion portfolio. He previously served as the first CISO for the City of San Diego, where he helped drive smart city initiatives and participated in the Governor of California Cyber Task Force, and held senior roles at Webroot Software and the U.S. Navy.

"Gary is one of the most respected voices in the security community. His career spans government, enterprise, and venture investment, giving him a unique perspective on how organizations can prepare for the next generation of threats. We are excited to have him join Halcyon and help accelerate our mission to defeat ransomware." — Jon Miller, CEO and Co-founder, Halcyon.

Learn more about how Halcyon helps organizations build ransomware resilience and request a demo here: https://www.halcyon.ai

About Halcyon

Halcyon, the leading anti-ransomware solution provider is purpose-built to defeat ransomware attacks. Our technology takes an end-to-end approach to proactively disrupt threats at every stage of the attack lifecycle, from pre-execution to data exfiltration and encryption. With a 24/7 expert team that does the heavy lifting for you, and a robust ransomware warranty, Halcyon eliminates the need for ransom payments, ensures operational continuity, and protects businesses from data extortion. Learn more at halcyon.ai.

SOURCE Halcyon