Thyme Care Executive and Leadership Team

August, 2026

Leadership Overview

Thyme Care has 5 executives leading key functions including strategy, operations, organizational alignment, legal compliance, and clinical excellence.

Focused on transforming the oncology experience, Thyme Care delivers personalized navigation and virtual support to improve cancer care outcomes, affordability, and member access across the entire healthcare ecosystem.

Leadership Roles at Thyme Care

  • Chief Executive Officer - Brad Diephuis
  • Chief Operating Officer - Marcia Macphearson
  • President & Chief Medical Officer - Bobby Green
  • Chief of Staff - Jessa Kelley
  • Chief Legal Officer - Michael Markowtiz
  • Brad Diephuis - Chief Executive Officer

    Brad Diephuis, the Chief Executive Officer at Thyme Care, directs the overarching strategic vision for oncology navigation services. Diephuis architects the long-term growth trajectory by fostering partnerships with health plans and oncology groups to scale virtual support solutions. By prioritizing member outcomes and healthcare affordability, the Chief Executive Officer ensures alignment between clinical goals and operational efficiency. Diephuis drives the expansion of the company's footprint across North American markets, focusing on reducing costs through proactive care coordination. This leadership role involves constant collaboration with the Board to refine the mission of enhancing the cancer journey. Through rigorous oversight of organizational performance, Brad Diephuis secures the company's position as a leader in the health software sector. Diephuis maintains a relentless focus on innovation, ensuring that every technological advancement directly benefits members navigating complex cancer treatments.
    Brad Diephuis

    Marcia Macphearson - Chief Operating Officer

    Marcia Macphearson, the Chief Operating Officer at Thyme Care, oversees the daily execution of oncology navigation programs and service delivery models. Macphearson directs the operational infrastructure required to support 24/7 virtual care, ensuring that oncology teams maintain high standards of member support. By scaling service capabilities, the Chief Operating Officer enhances the company's ability to partner effectively with diverse healthcare providers. Marcia Macphearson monitors key performance indicators to drive continuous improvement in care coordination and affordability metrics. This leadership role involves managing the logistical complexities of integrating software solutions into existing clinical workflows. Macphearson ensures that operational processes remain robust while expanding the company's reach across regional markets. Through the implementation of scalable systems, the Chief Operating Officer supports the broader mission of reducing healthcare costs and improving outcomes for members facing cancer diagnoses throughout the United States.
    Marcia Macphearson

    Bobby Green - President & Chief Medical Officer

    Bobby Green, the President & Chief Medical Officer at Thyme Care, leads the clinical strategy and medical oversight for all oncology navigation initiatives. Green architects the evidence-based protocols that guide expert oncology teams in providing personalized support to members. By integrating clinical expertise with software solutions, the President & Chief Medical Officer ensures that care coordination remains effective and patient-centered. Bobby Green drives the development of clinical partnerships, working directly with oncology groups to improve cancer care outcomes and affordability. This leadership role involves evaluating medical data to refine the company's approach to virtual support and member engagement. Green oversees the quality of care delivered across the national network, ensuring that every interaction meets rigorous clinical standards. Through the application of medical insights, the President & Chief Medical Officer supports the company's goal of transforming the cancer journey and reducing the overall burden on the healthcare system.

    Jessa Kelley - Chief of Staff

    Jessa Kelley, the Chief of Staff at Thyme Care, manages internal operations and cross-functional communication to ensure organizational agility. Kelley synchronizes efforts between executive leadership and departmental teams to execute the company's mission of improving cancer care access. By streamlining internal processes, the Chief of Staff optimizes the delivery of navigation services to health plans and primary care groups. Jessa Kelley facilitates high-level decision-making by providing data-driven insights into operational workflows and member engagement metrics. This role involves managing complex projects that span the entire organization, ensuring that strategic initiatives remain on schedule. Kelley drives efficiency by removing bottlenecks in communication, allowing the oncology teams to focus on providing 24/7 virtual support. Through meticulous coordination of resources, the Chief of Staff supports the company's commitment to transforming the member experience and reducing healthcare costs across the national landscape.
    Michael Markowtiz, the Chief Legal Officer at Thyme Care, manages all regulatory compliance and legal frameworks governing the company's oncology navigation services. Markowtiz architects the legal strategy to protect intellectual property and ensure adherence to healthcare privacy standards during virtual support interactions. By navigating the complex regulatory environment, the Chief Legal Officer enables the company to expand partnerships with health plans and oncology groups securely. Michael Markowtiz provides essential guidance on contractual agreements, mitigating risks associated with clinical data management and software deployment. This role involves close collaboration with executive leadership to ensure that all business initiatives align with federal and state healthcare laws. Markowtiz drives the development of internal policies that uphold the integrity of the company's mission. Through proactive legal oversight, the Chief Legal Officer secures the foundation for sustainable growth and innovation within the competitive health software industry.

    Explore Leadership Teams in Healthcare Software

    Frequently Asked Questions Regarding Thyme Care Top Executives and Leadership Team

    Who leads Thyme Care?
    Thyme Care is led by Brad Diephuis (Chief Executive Officer), along with executives such as Marcia Macphearson (Chief Operating Officer) and Bobby Green (President & Chief Medical Officer).
    Who is part of Thyme Care’s executive team?
    The executive team of Thyme Care includes leaders such as Brad Diephuis (Chief Executive Officer), Marcia Macphearson (Chief Operating Officer), Bobby Green (President & Chief Medical Officer) and other senior executives.
    How many executives does Thyme Care have?
    Thyme Care has 5 executives leading key business areas.
    What roles are included in Thyme Care’s leadership team?
    The leadership team of Thyme Care includes roles such as Chief Executive Officer, Chief Operating Officer, President & Chief Medical Officer, Chief of Staff, Chief Legal Officer.