Gigamon Taps Ex-Intelligence Cybersecurity Chief as CISO Amid AI Security Surge — Gigamon Inc.

Event summary

Grant Yacomeni appointed CISO at Gigamon, reporting to COO Gareth Maclachlan, effective September 2, 2026.
Yacomeni brings over a decade of cybersecurity experience from U.S. Intelligence Community and Department of Defense roles.
33% of organizations reported AI/LLM systems were targeted in breaches over the past year, per 2026 Hybrid Cloud Security Survey.
Yacomeni will oversee information security, product security, and governance, risk, and compliance (GRC) at Gigamon.

The big picture

Gigamon's appointment of Grant Yacomeni as CISO underscores the critical need for robust cybersecurity in an era where AI adoption is reshaping hybrid cloud infrastructure. With 33% of organizations reporting AI/LLM breaches, Yacomeni's experience in high-stakes cybersecurity environments positions Gigamon to navigate the evolving threat landscape. The move reflects broader industry trends where AI-driven security risks are becoming increasingly interconnected with business operations and resilience.

What we're watching

AI Security Risks: How Gigamon's new CISO will address the growing threat of AI-driven breaches in hybrid cloud environments.
Regulatory Compliance: Whether Yacomeni's national security background will strengthen Gigamon's GRC framework amid evolving regulations.
Customer Trust: The pace at which Gigamon can leverage Yacomeni's expertise to enhance customer security strategies in the Hybrid AI era.