Westcon-Comstor Executive and Leadership Team

May, 2026

Leadership Overview

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

Driven by value-added distribution, Westcon-Comstor focuses on providing advanced networking, cybersecurity, and cloud solutions globally, shaping market dynamics through specialized channel services.

Leadership Roles at Westcon-Comstor

  • Chief Executive Officer - David Grant
  • Chief Financial Officer - Catherine Mwololo
  • Chief Operating Officer & Chief Financial Officer - Callum McGregor
  • Chief Operating Officer - Elmien Toit
  • President - Diver Donn
  • Chief Information Officer - Dwight Pitter
  • Chief Marketing Officer - 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 ensures alignment across all business units, driving the company's mission to deliver specialized value-added distribution for networking, cybersecurity, and cloud solutions. Overseeing market expansion initiatives, Grant focuses on strengthening Westcon-Comstor's position as a premier technology distributor. This executive role involves fostering key partnerships and guiding the organization toward sustained growth and innovation in the competitive technology landscape. By championing a culture of excellence, David Grant ensures the company consistently meets and exceeds client expectations, solidifying its market leadership.
    David Grant

    Catherine Mwololo - Chief Financial Officer

    Catherine Mwololo, the Chief Financial Officer at Westcon-Comstor, directs all financial operations and strategic financial planning. Mwololo's purview includes managing accounting, financial reporting, treasury, and investor relations, ensuring the fiscal health and stability of the organization. This executive role is critical in supporting Westcon-Comstor's global distribution of networking, cybersecurity, and cloud solutions by providing sound financial guidance and oversight. Catherine Mwololo plays a key part in capital allocation, risk management, and driving profitability across all markets. By meticulously analyzing financial data and market trends, Mwololo informs executive decisions, supporting sustainable growth and maximizing shareholder value. The CFO's strategic insights are integral to the company's long-term financial success.

    Callum McGregor - Chief Operating Officer & Chief Financial Officer

    Callum McGregor, the Chief Operating Officer & Chief Financial Officer at Westcon-Comstor, directs both operational execution and financial strategy. McGregor's dual role ensures seamless integration between financial planning and operational efficiency, critical for the company's value-added distribution of networking, cybersecurity, and cloud solutions. This executive oversees financial reporting, budgeting, and resource allocation, while simultaneously optimizing supply chain management and service delivery processes. Callum McGregor's leadership focuses on driving profitability through operational excellence and sound financial governance. By aligning financial objectives with operational capabilities, McGregor supports sustainable business growth and enhances the company's competitive advantage in the global technology market. The combined oversight ensures robust business performance.
    Callum McGregor

    Elmien Toit - Chief Operating Officer

    Elmien Toit, the Chief Operating Officer at Westcon-Comstor, oversees the execution of daily business operations and the optimization of operational workflows. Toit's responsibilities encompass managing supply chain logistics, ensuring efficient service delivery, and driving operational excellence across the company's global network. This role is fundamental to Westcon-Comstor's ability to provide seamless value-added distribution of networking, cybersecurity, and cloud solutions. Elmien Toit focuses on enhancing operational efficiency, reducing costs, and improving the overall customer experience. Collaborating closely with other department heads, Toit ensures that operational strategies directly support the company's growth objectives and market commitments. The COO's leadership ensures the smooth functioning of all operational facets.
    Elmien Toit

    Diver Donn - President

    Diver Donn, the President at Westcon-Comstor, leads strategic initiatives and drives business development across key markets. Donn's role involves fostering growth opportunities and strengthening the company's position as a leading global technology distributor specializing in networking, cybersecurity, and cloud solutions. This executive leadership focuses on expanding market reach and enhancing partner relationships through value-added services. Diver Donn collaborates with the executive team to set strategic direction and ensure operational alignment with corporate goals. By championing innovation and customer-centric approaches, Donn contributes significantly to Westcon-Comstor's sustained success and market influence. The President's vision guides the company's forward trajectory.

    Dwight Pitter - Chief Information Officer

    Dwight Pitter, the Chief Information Officer at Westcon-Comstor, architects the global technology infrastructure and digital transformation strategies. Pitter oversees the development and implementation of robust IT systems that support the company's core business functions, including its value-added distribution services for networking, cybersecurity, and cloud solutions. This leadership position involves ensuring data security, optimizing system performance, and driving technological innovation across the organization. Dwight Pitter's responsibilities extend to managing the IT budget, leading the IT department, and collaborating with other C-suite executives to align technology roadmaps with business objectives. The CIO's focus remains on leveraging technology to enhance operational efficiency and provide a seamless experience for partners and customers.

    Patrick Aronson - Chief Marketing Officer

    Patrick Aronson, the Chief Marketing Officer at Westcon-Comstor, leads the development and execution of global marketing strategies. Aronson is responsible for brand management, market positioning, and driving demand generation for Westcon-Comstor's specialized distribution of networking, cybersecurity, and cloud solutions. This executive position involves overseeing all marketing campaigns, digital initiatives, and public relations efforts to enhance market presence and customer engagement. Patrick Aronson works to articulate the company's value proposition to partners and end-users, fostering strong market relationships. By analyzing market trends and customer insights, Aronson guides the marketing team to create impactful campaigns that support sales objectives and contribute to revenue growth. The CMO's strategic vision shapes the company's market perception.

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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 & 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 & 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 & Chief Financial Officer, Chief Operating Officer, President.