Parexel Executive and Leadership Team

July, 2026

Leadership Overview

Parexel has 9 executives leading key functions including finance, operations, clinical research, and technology.

Driven by a commitment to advancing health, Parexel focuses on delivering innovative solutions across the biopharmaceutical and medical device industries, enhancing global patient outcomes through expert research and development services.

Leadership Roles at Parexel

  • Chief Financial Officer - Gregory Rush
  • Chief Operating Officer - Georgina Singleton
  • Global President, Project Leadership & Launch Excellence - Teri Karcher
  • Global President, Clinical & Data Operations - Debra Tatton
  • President, Medical Marketing Services - Andrew Smith
  • President, Operational Excellence, Delivery & Innovation - Amy Kissam-Sands
  • Chief Medical Officer - Charlotte Moser
  • Chief Administrative Officer, General Counsel & Secretary - Michael Crowley
  • Chief Operating & Growth Officer - Peyton Howell
  • Gregory Rush - Chief Financial Officer

    Gregory Rush, the Chief Financial Officer at Parexel, directs all financial operations and strategic fiscal planning. Overseeing budgeting, forecasting, and financial reporting, Rush ensures robust financial health and compliance across the organization. This leadership role involves managing capital allocation, investor relations, and driving profitability through efficient resource management. By optimizing financial strategies, Gregory Rush directly supports Parexel's global expansion and investment in cutting-edge research services. Ultimately, Rush secures the company's financial stability and growth trajectory, aligning fiscal objectives with long-term business goals.

    Georgina Singleton - Chief Operating Officer

    Georgina Singleton, the Chief Operating Officer at Parexel, executes operational strategies to enhance service delivery and efficiency. Overseeing day-to-day business activities, Singleton drives process improvements across all operational segments, including Clinical Research Services (CRS) and PAREXEL Informatics (PI). This critical role involves optimizing resource utilization, managing operational risks, and ensuring seamless execution of complex clinical trials and data management projects. By streamlining workflows and implementing best practices, Georgina Singleton directly contributes to Parexel's reputation for reliability and excellence in biopharmaceutical outsourcing. Ultimately, Singleton ensures operational excellence supports the company's mission to advance global health outcomes.

    Teri Karcher - Global President, Project Leadership & Launch Excellence

    Teri Karcher, the Global President, Project Leadership & Launch Excellence at Parexel, directs the strategic execution of complex client projects and product launches. Overseeing project management frameworks and ensuring seamless delivery, Karcher champions best practices in clinical trial management and regulatory affairs. This role focuses on optimizing the transition from clinical development to market availability, ensuring clients achieve successful product introductions. By fostering a culture of excellence in project leadership, Teri Karcher directly enhances Parexel's ability to support pharmaceutical and biotechnology companies worldwide. Ultimately, Karcher drives client success through meticulous planning and flawless execution of critical launch initiatives.
    Teri Karcher

    Debra Tatton - Global President, Clinical & Data Operations

    Debra Tatton, the Global President, Clinical & Data Operations at Parexel, leads the comprehensive delivery of clinical research and data management services. Overseeing all aspects of clinical trial execution and data integrity, Tatton ensures adherence to global regulatory standards and client specifications. This pivotal role involves managing large-scale clinical operations, including data collection, biostatistical analysis, and epidemiological research. By optimizing clinical workflows and data governance, Debra Tatton directly enhances Parexel's capacity to manage complex research studies for the pharmaceutical, biotechnology, and medical device industries. Ultimately, Tatton ensures the highest quality outcomes in clinical research and data operations.

    Andrew Smith - President, Medical Marketing Services

    Andrew Smith, the President, Medical Marketing Services at Parexel, spearheads the strategic development and execution of commercialization and communication initiatives. Overseeing market access, product promotion, and targeted communication strategies, Smith guides clients through successful product launches and lifecycle management. This role involves leveraging deep industry expertise to craft compelling market narratives and support product adoption. By integrating medical insights with commercial objectives, Andrew Smith directly enhances Parexel's value proposition for clients in the pharmaceutical and biotechnology sectors. Ultimately, Smith drives market success through innovative and effective medical marketing solutions.

    Amy Kissam-Sands - President, Operational Excellence, Delivery & Innovation

    Amy Kissam-Sands, the President, Operational Excellence, Delivery & Innovation at Parexel, drives continuous improvement and technological advancement across service delivery. Overseeing the implementation of innovative solutions and optimizing operational processes, Kissam-Sands enhances efficiency and effectiveness in clinical research and data management. This role focuses on integrating cutting-edge technologies and methodologies to elevate service quality and client outcomes. By fostering a culture of innovation and operational rigor, Amy Kissam-Sands directly contributes to Parexel's leadership in the biopharmaceutical services sector. Ultimately, Kissam-Sands ensures Parexel remains at the forefront of delivery excellence and technological innovation.
    Amy Kissam-Sands

    Charlotte Moser - Chief Medical Officer

    Charlotte Moser, the Chief Medical Officer at Parexel, provides critical medical and scientific leadership across the organization. Overseeing clinical strategy and ensuring the scientific integrity of research services, Moser guides the development and execution of clinical trials. This role involves translating complex medical insights into actionable research plans, particularly within the pharmaceutical, biotechnology, and medical device sectors. By championing evidence-based approaches, Charlotte Moser directly influences the design and success of observational studies, patient registries, and post-marketing surveillance programs. Ultimately, Moser ensures Parexel's services align with the highest medical standards, driving innovation in patient care and therapeutic development.
    Charlotte Moser

    Michael Crowley - Chief Administrative Officer, General Counsel & Secretary

    Michael Crowley, the Chief Administrative Officer, General Counsel & Secretary at Parexel, provides comprehensive legal and administrative oversight. Overseeing all legal affairs, corporate governance, and administrative functions, Crowley ensures regulatory compliance and mitigates legal risks across global operations. This critical role involves advising leadership on legal strategy, managing corporate compliance, and safeguarding the company's interests. By maintaining robust legal frameworks and efficient administrative processes, Michael Crowley directly supports Parexel's mission and operational integrity. Ultimately, Crowley ensures the company operates within all legal and ethical boundaries, fostering a secure and compliant business environment.
    Michael Crowley

    Peyton Howell - Chief Operating & Growth Officer

    Peyton Howell, the Chief Operating & Growth Officer at Parexel, drives strategic initiatives for operational enhancement and market expansion. Overseeing key growth vectors and operational scaling, Howell identifies and capitalizes on new opportunities within the biopharmaceutical and medical device industries. This leadership position involves fostering cross-functional collaboration to accelerate product development and commercialization services. By aligning operational capabilities with market demands, Peyton Howell directly fuels Parexel's expansion into new therapeutic areas and geographic regions. Ultimately, Howell ensures the company's operational framework supports sustained growth and increased market impact.
    Peyton Howell

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    Frequently Asked Questions Regarding Parexel Top Executives and Leadership Team

    Who leads Parexel?
    Parexel is led by Gregory Rush (Chief Financial Officer), along with executives such as Georgina Singleton (Chief Operating Officer) and Teri Karcher (Global President, Project Leadership & Launch Excellence).
    Who is part of Parexel’s executive team?
    The executive team of Parexel includes leaders such as Gregory Rush (Chief Financial Officer), Georgina Singleton (Chief Operating Officer), Teri Karcher (Global President, Project Leadership & Launch Excellence) and other senior executives.
    How many executives does Parexel have?
    Parexel has 9 executives leading key business areas.
    What roles are included in Parexel’s leadership team?
    The leadership team of Parexel includes roles such as Chief Financial Officer, Chief Operating Officer, Global President, Project Leadership & Launch Excellence, Global President, Clinical & Data Operations, President, Medical Marketing Services.