ILLUMINA Executive and Leadership Team

August, 2026

Leadership Overview

ILLUMINA has 5 executives leading key functions including information technology, strategic operations, marketing administration, and corporate support.

Focused on advancing genomic research, ILLUMINA delivers sequencing and array-based solutions to accelerate cancer diagnostics and improve patient outcomes across global healthcare markets.

Leadership Roles at ILLUMINA

  • Chief Information Officer - Mark Field
  • Chief of Staff To the Chief Information Officer - Erin Kroll
  • Senior Executive Administrative Partner To Chief Marketing Officer - Jacqueline Tran
  • Senior Administrative Partner - Melissa Mosley
  • Senior Administrative Partner - Margaret Yam
  • Mark Field - Chief Information Officer

    Mark Field, the Chief Information Officer at ILLUMINA, directs the digital infrastructure supporting complex genomic data analysis. Field manages the enterprise-wide technology stack, ensuring secure and scalable platforms for sequencing instruments and array-based consumables. By optimizing cloud-based storage and high-performance computing environments, the Chief Information Officer enables researchers to process whole-genome data with maximum efficiency. Field collaborates with the executive team to align digital transformation initiatives with the broader mission of accelerating cancer diagnoses and blood-based detection. This leadership role involves overseeing global cybersecurity protocols to protect sensitive genetic information across international operations. Through the integration of advanced data analytics, Mark Field drives operational excellence, ensuring that the technological backbone of the company remains robust enough to support pharmaceutical, biotechnology, and academic partners in their critical scientific endeavors.
    Mark Field

    Erin Kroll - Chief of Staff To the Chief Information Officer

    Erin Kroll, the Chief of Staff To the Chief Information Officer at ILLUMINA, coordinates strategic initiatives within the information technology division. Kroll manages cross-functional workflows, ensuring that the Chief Information Officer maintains focus on high-priority genomic sequencing projects and digital infrastructure upgrades. By facilitating communication between technical teams and executive leadership, the Chief of Staff To the Chief Information Officer streamlines decision-making processes related to global data management. Erin Kroll monitors the execution of long-term technology roadmaps, specifically those supporting the development of multi-cancer early detection tests and post-diagnostic applications. This role requires constant alignment with the company's operational goals in the United States, Singapore, and the United Kingdom. Through rigorous project oversight and resource allocation, Kroll ensures that the IT department delivers the necessary tools for genomic research centers and hospitals to achieve rapid, accurate diagnostic results.

    Jacqueline Tran - Senior Executive Administrative Partner To Chief Marketing Officer

    Jacqueline Tran, the Senior Executive Administrative Partner To Chief Marketing Officer at ILLUMINA, manages the operational cadence of the global marketing organization. Tran optimizes the scheduling and communication flow for the Chief Marketing Officer, ensuring that strategic messaging regarding sequencing and array-based solutions reaches key stakeholders in the biotechnology and pharmaceutical sectors. By coordinating high-level meetings and board presentations, the Senior Executive Administrative Partner To Chief Marketing Officer supports the expansion of market reach for products like the Galleri test. Jacqueline Tran oversees the administrative logistics of international marketing campaigns, ensuring that regional teams remain synchronized with corporate objectives. This role involves managing complex calendars and project timelines to facilitate the successful launch of new genomic kits. Through meticulous organization and proactive problem-solving, Tran enables the marketing leadership to focus on driving revenue growth and strengthening the company's position as a leader in genomic analysis.

    Melissa Mosley - Senior Administrative Partner

    Melissa Mosley, the Senior Administrative Partner at ILLUMINA, provides essential operational support to the executive leadership team. Mosley manages complex administrative workflows that underpin the company's ability to distribute sequencing instruments and consumables to academic and government laboratories. By streamlining internal processes, the Senior Administrative Partner ensures that executive resources remain focused on scaling the production of whole-genome sequencing kits and targeted resequencing tools. Melissa Mosley coordinates cross-departmental activities, facilitating seamless communication between research, development, and commercial teams. This role involves managing high-level correspondence and project tracking to support the company's international expansion efforts. Through efficient resource management and process optimization, Mosley contributes to the overall stability of the organization. By maintaining high standards of operational efficiency, the Senior Administrative Partner enables the executive team to execute the company's mission of providing innovative genomic solutions to the global scientific community.

    Margaret Yam - Senior Administrative Partner

    Margaret Yam, the Senior Administrative Partner at ILLUMINA, oversees critical administrative functions that support the company's core business segments. Yam manages the logistical coordination for executive initiatives, ensuring that the leadership team maintains focus on the development of blood-based detection solutions and minimal residual disease applications. By organizing complex schedules and facilitating inter-departmental collaboration, the Senior Administrative Partner enables the efficient delivery of sequencing and array-based services to hospitals and molecular diagnostic laboratories. Margaret Yam monitors project milestones and ensures that administrative support aligns with the company's strategic goals in the United States and international markets. This role involves managing sensitive information and coordinating with external partners to support the company's growth in the genomics industry. Through proactive planning and meticulous attention to detail, Yam ensures that the executive office operates with maximum efficiency, directly supporting the company's commitment to advancing genomic analysis and cancer diagnostics.

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    Frequently Asked Questions Regarding ILLUMINA Top Executives and Leadership Team

    Who leads ILLUMINA?
    ILLUMINA is led by Mark Field (Chief Information Officer), along with executives such as Erin Kroll (Chief of Staff To the Chief Information Officer) and Jacqueline Tran (Senior Executive Administrative Partner To Chief Marketing Officer).
    Who is part of ILLUMINA’s executive team?
    The executive team of ILLUMINA includes leaders such as Mark Field (Chief Information Officer), Erin Kroll (Chief of Staff To the Chief Information Officer), Jacqueline Tran (Senior Executive Administrative Partner To Chief Marketing Officer) and other senior executives.
    How many executives does ILLUMINA have?
    ILLUMINA has 5 executives leading key business areas.
    What roles are included in ILLUMINA’s leadership team?
    The leadership team of ILLUMINA includes roles such as Chief Information Officer, Chief of Staff To the Chief Information Officer, Senior Executive Administrative Partner To Chief Marketing Officer, Senior Administrative Partner, Senior Administrative Partner.