Gigamon Executive and Leadership Team

September, 2026

Leadership Overview

Gigamon has 4 executives leading key functions including strategy, revenue generation, operational efficiency, and financial management.

Focused on deep observability, Gigamon delivers advanced network intelligence to secure complex digital infrastructures and optimize application performance across global enterprise environments.

Leadership Roles at Gigamon

  • Director, Program Management & Office of The President & Chief Executive Officer - Jeff Achtzehn
  • Chief Financial Officer - Tony Jarjoura
  • Chief Operating Officer - Gareth Maclachlan
  • Chief Revenue Officer - John Giacomini
  • Jeff Achtzehn - Director, Program Management & Office of The President & Chief Executive Officer

    Jeff Achtzehn, the Director, Program Management & Office of The President & Chief Executive Officer at Gigamon, aligns corporate strategy with execution across all internal departments. Managing the Office of the President, the Director, Program Management & Office of The President & Chief Executive Officer synchronizes high-level initiatives to ensure the organization maintains focus on network visibility and analytics. This role involves bridging communication gaps between executive leadership and functional teams to accelerate product delivery cycles. By optimizing internal workflows, Jeff Achtzehn drives the operational cadence necessary for sustained market leadership. The Director, Program Management & Office of The President & Chief Executive Officer monitors key performance indicators to verify that strategic goals remain on track. Through rigorous oversight of cross-functional programs, the Director, Program Management & Office of The President & Chief Executive Officer secures the structural integrity required for Gigamon to deliver advanced intelligence for security and application performance management.
    Jeff Achtzehn

    Tony Jarjoura - Chief Financial Officer

    Tony Jarjoura, the Chief Financial Officer at Gigamon, manages the financial health and capital allocation strategies of the organization. Overseeing fiscal planning, the Chief Financial Officer ensures that investments in network visibility and analytics align with long-term growth objectives. This role involves maintaining rigorous financial controls and reporting standards to support the strategic decisions of the executive team. By analyzing market trends and operational costs, Tony Jarjoura drives the financial discipline necessary to sustain innovation in security and application performance management. The Chief Financial Officer collaborates with the Board to communicate financial performance and secure the resources required for expansion into new geographic markets. Through the management of capital structures and investment portfolios, the Chief Financial Officer secures the economic foundation of Gigamon. This leadership role remains critical in balancing the need for aggressive product development with the requirement for consistent profitability and shareholder value in the competitive software industry.
    Tony Jarjoura

    Gareth Maclachlan - Chief Operating Officer

    Gareth Maclachlan, the Chief Operating Officer at Gigamon, manages the day-to-day business operations to ensure seamless delivery of network visibility products. Overseeing the supply chain and internal infrastructure, the Chief Operating Officer optimizes resource allocation to support the rapid deployment of advanced intelligence tools. This role involves coordinating with engineering and product teams to maintain high standards of application performance management. By streamlining operational processes, Gareth Maclachlan drives efficiency across the entire organization. The Chief Operating Officer monitors global operational health to mitigate risks and ensure the company meets the evolving demands of the security market. Through strategic planning and execution, the Chief Operating Officer supports the broader mission of Gigamon to provide comprehensive network analytics. This leadership function ensures that all internal systems remain aligned with the company's commitment to delivering high-quality, reliable solutions for complex digital environments, ultimately fostering sustainable growth and operational excellence.
    Gareth Maclachlan

    John Giacomini - Chief Revenue Officer

    John Giacomini, the Chief Revenue Officer at Gigamon, directs global sales strategies to expand market share for network visibility solutions. Overseeing the entire revenue organization, the Chief Revenue Officer builds scalable sales processes that address the complex security and performance needs of enterprise clients. This leadership role involves managing regional sales teams to ensure consistent growth across diverse international markets. By aligning sales efforts with product innovation, John Giacomini maximizes the value delivered to customers seeking advanced network intelligence. The Chief Revenue Officer collaborates with marketing and product departments to refine go-to-market tactics and capture emerging opportunities in the observability sector. Through the implementation of data-driven sales methodologies, the Chief Revenue Officer secures long-term financial stability and strengthens the competitive position of Gigamon. This focus on revenue excellence ensures that the company continues to provide critical analytics for security and application performance management on a global scale.
    John Giacomini

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    Frequently Asked Questions Regarding Gigamon Top Executives and Leadership Team

    Who leads Gigamon?
    Gigamon is led by Jeff Achtzehn (Director, Program Management & Office of The President & Chief Executive Officer), along with executives such as Tony Jarjoura (Chief Financial Officer) and Gareth Maclachlan (Chief Operating Officer).
    Who is part of Gigamon’s executive team?
    The executive team of Gigamon includes leaders such as Jeff Achtzehn (Director, Program Management & Office of The President & Chief Executive Officer), Tony Jarjoura (Chief Financial Officer), Gareth Maclachlan (Chief Operating Officer) and other senior executives.
    How many executives does Gigamon have?
    Gigamon has 4 executives leading key business areas.
    What roles are included in Gigamon’s leadership team?
    The leadership team of Gigamon includes roles such as Director, Program Management & Office of The President & Chief Executive Officer, Chief Financial Officer, Chief Operating Officer, Chief Revenue Officer.