Gigamon appoints Stewart Gregory as Sales Chief for EMEA

Gigamon has appointed Stewart Gregory as Vice President of Sales for EMEA.

Based in London, he will lead the company's go-to-market strategy across Europe, the Middle East and Africa.

Gregory will report to Chief Revenue Officer John Giacomini and lead regional sales expansion as Gigamon looks to grow its presence with customers and partners. His remit includes driving revenue growth and developing the partner ecosystem across the region.

The appointment comes as security suppliers respond to rising demand from organisations managing more complex cloud and data environments. Across EMEA, companies are increasing their use of artificial intelligence and hybrid cloud systems, producing heavier internal traffic, more encrypted data and greater volumes of machine-generated activity.

These changes have made it harder for many security and monitoring tools to fully inspect network traffic. Suppliers argue that the resulting blind spots can leave customers exposed to cyber threats, application performance issues and higher operating costs.

Gigamon focuses on network visibility and telemetry, an area drawing more attention as businesses spread workloads across on-premise systems, public cloud platforms and connected services. Customers use its Deep Observability Pipeline to examine data in motion across those environments and feed that information into cloud, security and observability tools.

Regional push

EMEA is an important market for cybersecurity suppliers, not only because of its large enterprise base but also because organisations across the region often manage a mix of legacy infrastructure, regulated workloads and newer cloud deployments. That has created demand for products that promise a clearer view of activity moving between applications, data centres and cloud systems.

For Gigamon, the hire signals a push to strengthen both direct sales and partner-led routes to market as buyers reassess how they manage risk in hybrid environments. The move also forms part of a broader effort to address customer concerns about visibility gaps created by AI adoption.

Gregory joins with nearly three decades of experience in IT and cybersecurity. He has held senior roles at Cribl, CrowdStrike, Tanium and OpenDNS, where he worked on regional expansion and sales growth across enterprise and public sector accounts.

His background suggests Gigamon wants an executive with experience both scaling field organisations and working through indirect channels. That is particularly relevant in EMEA, where cybersecurity vendors often rely on networks of resellers, integrators and service providers to reach customers across fragmented national markets.

Giacomini said the region offers room for further growth as customers face more complex infrastructure and security demands.

"EMEA represents a significant growth opportunity for Gigamon as customers work to secure and manage increasingly complex hybrid cloud environments," said John Giacomini, Chief Revenue Officer at Gigamon.

"Stewart brings deep experience building and scaling high-performing sales teams across some of the most successful cybersecurity and infrastructure companies. He understands how to align go-to-market execution with customer outcomes, and he will play a key role in expanding our presence, strengthening our partner ecosystem and accelerating growth across the region."

Market backdrop

The security market has been reshaped by the spread of encrypted traffic, east-west data flows within cloud environments and wider use of AI tools in corporate systems. These shifts have made traditional perimeter-focused approaches less effective, prompting more suppliers to focus on visibility inside networks and across distributed applications.

That trend has also raised the profile of network-derived telemetry, giving operations and security teams another source of data beyond endpoint and log-based tools. Suppliers say this can help identify lateral movement, hidden threats and performance faults that might otherwise go undetected.

Gigamon counts more than 4,000 organisations among its customers worldwide, including 83 of the Fortune 100, as well as mobile network operators and public sector bodies. That installed base gives it a platform in large, complex environments where buyers often need tools that can operate across mixed infrastructure estates.

The decision to base the role in London reflects the city's continued role as a regional hub for cybersecurity sales leadership, even as demand spreads across continental Europe, the Gulf and Africa. Managing those markets requires balancing large multinational accounts with local partner relationships and country-specific buying patterns.

Gregory said many organisations still struggle to gain the visibility needed to secure and operate newer technology estates.

"Across EMEA, organizations are investing heavily in AI and hybrid cloud, yet many still lack the visibility needed to secure and manage these environments with confidence," said Stewart Gregory, Vice President of Sales, EMEA, at Gigamon.

"That gap creates risk, cost and operational challenges. Gigamon is uniquely positioned to help customers close it with trusted network-derived telemetry and deep observability, and I'm eager to work with our teams and partners to accelerate that impact across the region."