Gilead Sciences Executive and Leadership Team

June, 2026

Leadership Overview

Gilead Sciences has 10 executives leading key functions including finance, operations, commercial strategy, research, and marketing.

Driven by a commitment to innovation, Gilead Sciences is dedicated to discovering, developing, and commercializing transformative medicines for unmet medical needs, impacting global health through scientific advancement.

Leadership Roles at Gilead Sciences

  • Chief Financial Officer - Andrew Dickinson
  • Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer - Srihari Narasimhan
  • Chief Operating Officer - Daryl Winter
  • To Commercial Chief of Staff (US) & Senior VP - Ellen Suen
  • Director, Research Chief of Staff and Strategic Projects - Susanna Stinson
  • Chief of Staff To the Executive Vice President of Human Resources - Christopher Iwata
  • Head To Oncology Business Unit Chief of Staff - Angela Carlin
  • Executive Director and Chief of Staff - Sonja Tong
  • Chief Marketing Officer & Manager - Liz Spicer
  • Chief of Staff To Senior Vice President Chief Ethics and Compliance Officer - Courtney Desmond
  • Andrew Dickinson - Chief Financial Officer

    Andrew Dickinson, the Chief Financial Officer at Gilead Sciences, directs all financial operations and strategic financial planning. Overseeing global fiscal health, the Chief Financial Officer ensures robust capital allocation and drives shareholder value through disciplined financial management. This leadership role involves managing budgets, forecasting revenue, and optimizing investment strategies across the company's diverse therapeutic areas, including HIV/AIDS, viral hepatitis, and oncology. By analyzing market trends and economic conditions, Andrew Dickinson guides the company's financial trajectory, ensuring resources are effectively deployed to support research and development initiatives and commercial expansion. The Chief Financial Officer's oversight extends to financial reporting, risk management, and maintaining strong relationships with investors and financial institutions, underpinning the company's stability and growth in the biopharmaceutical sector.
    Andrew Dickinson

    Srihari Narasimhan - Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer

    Srihari Narasimhan, the Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer at Gilead Sciences, drives key strategic projects and supports financial leadership. Orchestrating strategic planning, the Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer ensures alignment between financial objectives and corporate growth strategies. This role involves analyzing business opportunities, developing financial models for new ventures, and supporting the Chief Financial Officer in critical decision-making processes. Srihari Narasimhan's contributions are essential for identifying and executing initiatives that enhance the company's market position and financial performance. The Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer's work supports Gilead's commitment to innovation and its mission to develop transformative medicines. Narasimhan's analytical skills provide crucial insights for financial and strategic planning.
    Srihari Narasimhan

    Daryl Winter - Chief Operating Officer

    Daryl Winter, the Chief Operating Officer at Gilead Sciences, oversees the company's operational infrastructure and efficiency. Driving global operational excellence, the Chief Operating Officer ensures seamless execution of business processes across all departments, from manufacturing to supply chain management. This critical role involves optimizing resource utilization and implementing best practices to support the development and delivery of life-saving medicines. Daryl Winter's responsibilities include enhancing productivity, managing operational risks, and fostering a culture of continuous improvement throughout the organization. The Chief Operating Officer's strategic focus supports the company's mission to address unmet medical needs by ensuring reliable and efficient production and distribution of its pharmaceutical products worldwide. Winter's leadership ensures that Gilead Sciences operates at peak performance, enabling rapid response to market demands and scientific breakthroughs.

    Ellen Suen - To Commercial Chief of Staff (US) & Senior VP

    Ellen Suen, the To Commercial Chief of Staff (US) & Senior VP at Gilead Sciences, provides strategic support and operational leadership for the US commercial division. Driving commercial success, the To Commercial Chief of Staff (US) & Senior VP aligns strategic initiatives with market execution, ensuring optimal performance across key therapeutic areas. This role involves close collaboration with sales, marketing, and market access teams to enhance product launches and market penetration. Ellen Suen's focus includes streamlining commercial operations, managing cross-functional projects, and translating corporate strategy into actionable plans for the US market. The To Commercial Chief of Staff (US) & Senior VP's expertise is vital in navigating the complex US healthcare landscape, supporting the delivery of Gilead's innovative medicines to patients. Suen's leadership ensures the commercial teams are equipped to meet evolving patient needs and market dynamics.

    Susanna Stinson - Director, Research Chief of Staff and Strategic Projects

    Susanna Stinson, the Director, Research Chief of Staff and Strategic Projects at Gilead Sciences, spearheads critical initiatives within the research and development organization. Driving scientific advancement, the Director, Research Chief of Staff and Strategic Projects enhances the efficiency and strategic focus of R&D operations. This position involves managing complex research projects, facilitating cross-functional collaboration among scientific teams, and ensuring alignment with the company's long-term research objectives. Susanna Stinson's responsibilities include optimizing research workflows, supporting key decision-making processes, and driving the successful execution of strategic R&D programs. The Director, Research Chief of Staff and Strategic Projects plays a pivotal role in translating scientific discoveries into potential new therapies, contributing directly to Gilead's mission of addressing significant unmet medical needs. Stinson's project management acumen accelerates the pace of innovation.

    Christopher Iwata - Chief of Staff To the Executive Vice President of Human Resources

    Christopher Iwata, the Chief of Staff To the Executive Vice President of Human Resources at Gilead Sciences, provides strategic and operational support to the HR leadership. Driving human capital strategy, the Chief of Staff To the Executive Vice President of Human Resources enhances the effectiveness of HR programs and initiatives across the organization. This role involves managing key HR projects, facilitating communication between HR and other departments, and ensuring alignment with Gilead's overall business objectives. Christopher Iwata's responsibilities include optimizing HR processes, supporting talent management strategies, and contributing to a positive and productive work environment. The Chief of Staff To the Executive Vice President of Human Resources plays a crucial part in fostering employee engagement and supporting the development of Gilead's workforce. Iwata's efforts strengthen the company's foundation by ensuring its people strategies are robust and aligned with its mission.

    Angela Carlin - Head To Oncology Business Unit Chief of Staff

    Angela Carlin, the Head To Oncology Business Unit Chief of Staff at Gilead Sciences, directs strategic operations and project management for the oncology business unit. Driving oncology growth, the Head To Oncology Business Unit Chief of Staff ensures seamless execution of business plans and supports leadership in advancing critical oncology therapies. This role involves coordinating cross-functional efforts, managing strategic initiatives, and optimizing the operational efficiency of the oncology division. Angela Carlin's responsibilities include facilitating communication, overseeing project timelines, and ensuring alignment with the company's broader goals in cancer treatment. The Head To Oncology Business Unit Chief of Staff's expertise is vital in accelerating the development and commercialization of innovative cancer medicines. Carlin's leadership enhances Gilead's commitment to fighting cancer through scientific breakthroughs and strategic execution.

    Sonja Tong - Executive Director and Chief of Staff

    Sonja Tong, the Executive Director and Chief of Staff at Gilead Sciences, provides comprehensive strategic and operational support to senior leadership. Driving organizational effectiveness, the Executive Director and Chief of Staff enhances the execution of key corporate strategies and initiatives. This position involves managing complex projects, facilitating cross-departmental collaboration, and ensuring efficient workflow across various business functions. Sonja Tong's responsibilities include streamlining operations, supporting strategic planning processes, and contributing to the overall success of Gilead's mission to develop transformative medicines. The Executive Director and Chief of Staff plays a vital role in translating leadership vision into tangible results, ensuring that Gilead Sciences remains at the forefront of biopharmaceutical innovation. Tong's strategic oversight strengthens the company's operational capabilities.

    Liz Spicer - Chief Marketing Officer & Manager

    Liz Spicer, the Chief Marketing Officer & Manager at Gilead Sciences, leads the company's marketing strategies and brand management efforts. Driving market penetration, the Chief Marketing Officer & Manager develops and executes comprehensive marketing plans to communicate the value of Gilead's innovative medicines to healthcare professionals and patients. This role involves overseeing market research, product positioning, and promotional campaigns across various therapeutic areas, including HIV/AIDS, viral hepatitis, and oncology. Liz Spicer's responsibilities include building strong brand equity, identifying new market opportunities, and ensuring marketing initiatives align with the company's scientific and commercial objectives. The Chief Marketing Officer & Manager's leadership is crucial for expanding access to Gilead's life-saving treatments and reinforcing its position as a leader in biopharmaceuticals. Spicer's strategic marketing vision supports global health outcomes.
    Liz Spicer

    Courtney Desmond - Chief of Staff To Senior Vice President Chief Ethics and Compliance Officer

    Courtney Desmond, the Chief of Staff To Senior Vice President Chief Ethics and Compliance Officer at Gilead Sciences, supports the integrity and ethical conduct of the organization. Driving compliance excellence, the Chief of Staff To Senior Vice President Chief Ethics and Compliance Officer ensures adherence to regulatory standards and ethical guidelines across all business operations. This role involves managing compliance projects, facilitating communication with regulatory bodies, and supporting the development and implementation of robust compliance programs. Courtney Desmond's responsibilities include monitoring ethical practices, conducting risk assessments, and promoting a culture of integrity throughout Gilead Sciences. The Chief of Staff To Senior Vice President Chief Ethics and Compliance Officer plays a critical role in safeguarding the company's reputation and ensuring responsible business conduct. Desmond's diligence upholds Gilead's commitment to ethical operations.

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    Frequently Asked Questions Regarding Gilead Sciences Top Executives and Leadership Team

    Who leads Gilead Sciences?
    Gilead Sciences is led by Andrew Dickinson (Chief Financial Officer), along with executives such as Srihari Narasimhan (Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer) and Daryl Winter (Chief Operating Officer).
    Who is part of Gilead Sciences’s executive team?
    The executive team of Gilead Sciences includes leaders such as Andrew Dickinson (Chief Financial Officer), Srihari Narasimhan (Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer), Daryl Winter (Chief Operating Officer) and other senior executives.
    How many executives does Gilead Sciences have?
    Gilead Sciences has 10 executives leading key business areas.
    What roles are included in Gilead Sciences’s leadership team?
    The leadership team of Gilead Sciences includes roles such as Chief Financial Officer, Strategic Initiatives Lead & To The Chief of Staff & Chief Financial Officer, Chief Operating Officer, To Commercial Chief of Staff (US) & Senior VP, Director, Research Chief of Staff and Strategic Projects.