Westcon-Comstor Executive and Leadership Team

July, 2026

Leadership Overview

Westcon-Comstor has 7 executives leading key functions including strategy, operations, technology, finance, marketing, and market expansion.

Driven by value-added distribution, Westcon-Comstor provides specialized networking, cybersecurity, and cloud solutions globally, impacting market dynamics through expert channel enablement.

Leadership Roles at Westcon-Comstor

  • Chief Executive Officer - David Grant
  • Chief Financial Officer - Catherine Mwololo
  • Chief Operating Officer & Group Chief Financial Officer - Callum McGregor
  • Chief Operating Officer - Elmien Toit
  • President - Diver Donn
  • Chief Information Officer - Dwight Pitter
  • Chief Marketing Officer & Executive VP (APAC) - Patrick Aronson
  • David Grant - Chief Executive Officer

    David Grant, the Chief Executive Officer at Westcon-Comstor, directs the overarching corporate strategy and global operations. Grant's leadership focuses on driving growth within the technology distribution sector, ensuring alignment with market demands for networking, cybersecurity, and cloud solutions. Overseeing all executive functions, Grant ensures the company's strategic vision translates into tangible business outcomes across all regions. This executive role involves fostering innovation and maintaining Westcon-Comstor's position as a premier value-added distributor. By guiding the executive team, David Grant champions initiatives that enhance partner success and expand market reach, solidifying the company's influence in the global technology ecosystem.
    David Grant

    Catherine Mwololo - Chief Financial Officer

    Catherine Mwololo, the Chief Financial Officer at Westcon-Comstor, directs all financial planning, management, and reporting activities. Mwololo's strategic oversight ensures the fiscal health and stability of the organization, supporting its global operations in technology distribution. This critical role involves managing capital allocation, optimizing financial performance, and ensuring compliance with all regulatory requirements across diverse markets. By guiding financial strategy, Catherine Mwololo enables sustainable growth and profitability for Westcon-Comstor. The Chief Financial Officer's expertise is essential for informed decision-making, investment strategies, and maintaining strong relationships with financial stakeholders, underpinning the company's market presence.

    Callum McGregor - Chief Operating Officer & Group Chief Financial Officer

    Callum McGregor, the Chief Operating Officer & Group Chief Financial Officer at Westcon-Comstor, provides dual leadership across critical operational and financial functions. McGregor's responsibilities include optimizing global operational efficiency and ensuring robust financial management to support the company's distribution of networking, cybersecurity, and cloud solutions. This executive role involves integrating operational strategies with financial planning to drive profitability and sustainable growth. By overseeing both operational execution and financial stewardship, Callum McGregor ensures cohesive business performance. The Group Chief Financial Officer's financial acumen combined with operational insight is vital for strategic decision-making and maintaining the company's strong market standing.
    Callum McGregor

    Elmien Toit - Chief Operating Officer

    Elmien Toit, the Chief Operating Officer at Westcon-Comstor, manages the day-to-day operational execution across the company's global footprint. Toit's responsibilities encompass optimizing distribution processes, enhancing supply chain efficiency, and ensuring seamless service delivery for networking, cybersecurity, and cloud solutions. This role involves direct oversight of operational teams, driving performance improvements, and implementing best practices to support partner growth. By focusing on operational excellence, Elmien Toit ensures that Westcon-Comstor consistently meets and exceeds client expectations. The Chief Operating Officer's strategic input is vital for scaling operations and adapting to evolving market needs, directly contributing to the company's robust service model.
    Elmien Toit

    Diver Donn - President

    Diver Donn, the President at Westcon-Comstor, leads strategic initiatives and oversees key business units to drive company growth and market penetration. Donn's leadership focuses on enhancing the company's value proposition in networking, cybersecurity, and cloud solutions distribution. This executive position involves fostering strong relationships with partners and stakeholders, ensuring operational excellence across all managed divisions. By directing strategic priorities, Diver Donn plays a pivotal role in expanding Westcon-Comstor's global reach and influence. The President's vision is instrumental in navigating market complexities and capitalizing on emerging opportunities within the technology distribution landscape.

    Dwight Pitter - Chief Information Officer

    Dwight Pitter, the Chief Information Officer at Westcon-Comstor, architects and oversees the company's global technology infrastructure and digital transformation initiatives. Pitter's mandate includes enhancing cybersecurity defenses, optimizing IT systems, and leveraging technology to drive business efficiency and innovation in the distribution of networking, cybersecurity, and cloud solutions. This executive position involves managing all aspects of information technology, ensuring data integrity, and implementing cutting-edge solutions that support operational goals. By directing technology strategy, Dwight Pitter ensures Westcon-Comstor maintains a competitive edge through robust digital capabilities. The Chief Information Officer's work is critical for enabling seamless partner interactions and internal workflows.
    Dwight Pitter

    Patrick Aronson - Chief Marketing Officer & Executive VP (APAC)

    Patrick Aronson, the Chief Marketing Officer & Executive VP (APAC) at Westcon-Comstor, drives global marketing strategies and leads significant business development efforts across the Asia-Pacific region. Aronson's dual role focuses on enhancing brand visibility, generating demand for networking, cybersecurity, and cloud solutions, and expanding market share within the APAC territory. This executive leadership position involves orchestrating integrated marketing campaigns and overseeing regional sales operations to achieve ambitious growth targets. By championing innovative marketing approaches, Patrick Aronson ensures Westcon-Comstor strengthens its market position and partner engagement. The Chief Marketing Officer's strategic direction is key to driving revenue and solidifying the company's global brand.
    Patrick Aronson

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    Frequently Asked Questions Regarding Westcon-Comstor Top Executives and Leadership Team

    Who leads Westcon-Comstor?
    Westcon-Comstor is led by David Grant (Chief Executive Officer), along with executives such as Catherine Mwololo (Chief Financial Officer) and Callum McGregor (Chief Operating Officer & Group Chief Financial Officer).
    Who is part of Westcon-Comstor’s executive team?
    The executive team of Westcon-Comstor includes leaders such as David Grant (Chief Executive Officer), Catherine Mwololo (Chief Financial Officer), Callum McGregor (Chief Operating Officer & Group Chief Financial Officer) and other senior executives.
    How many executives does Westcon-Comstor have?
    Westcon-Comstor has 7 executives leading key business areas.
    What roles are included in Westcon-Comstor’s leadership team?
    The leadership team of Westcon-Comstor includes roles such as Chief Executive Officer, Chief Financial Officer, Chief Operating Officer & Group Chief Financial Officer, Chief Operating Officer, President.