Thyme Care Executive and Leadership Team

September, 2026

Leadership Overview

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

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 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 Markowicz
  • 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 enhance care coordination. By prioritizing member experience and affordability, the Chief Executive Officer ensures that virtual support models remain accessible and effective. Diephuis oversees the integration of clinical data to drive better health outcomes across North American markets. This leadership role involves constant collaboration with the board to refine the business model and expand the reach of navigation solutions. Through rigorous focus on operational excellence, Brad Diephuis maintains the company's position as a leader in cancer care innovation. Diephuis secures the necessary resources to scale these vital services, ultimately reducing healthcare costs while improving the quality of life for members navigating complex cancer journeys.
    Brad Diephuis

    Marcia Macphearson - Chief Operating Officer

    Marcia Macphearson, the Chief Operating Officer at Thyme Care, oversees the daily execution of oncology navigation services and operational workflows. Macphearson directs the implementation of virtual support systems to ensure seamless member experiences across diverse healthcare settings. By refining operational processes, the Chief Operating Officer improves the efficiency of care coordination between primary care groups and oncology specialists. Macphearson manages the scaling of service delivery models to meet the needs of a growing member base. This leadership role involves analyzing operational data to identify opportunities for cost reduction and quality improvement. Marcia Macphearson ensures that all clinical support teams operate with precision and empathy. Macphearson drives the development of scalable infrastructure that supports the company's mission to enhance cancer care affordability. Through consistent oversight of operational performance, the Chief Operating Officer maintains high standards of service, ensuring that every member receives timely and effective navigation support throughout the cancer journey.
    Marcia Macphearson

    Bobby Green - President & Chief Medical Officer

    Bobby Green, the President & Chief Medical Officer at Thyme Care, directs the clinical strategy and medical oversight of all navigation programs. Green architects the evidence-based protocols that guide oncology teams in providing personalized support to members. By integrating clinical expertise into the virtual care model, the President & Chief Medical Officer ensures that every intervention improves health outcomes and patient experience. Green collaborates with oncology groups to standardize care pathways and enhance communication across the cancer care community. This leadership role involves evaluating clinical performance metrics to drive continuous improvement in navigation services. Bobby Green leads the medical team in addressing the complex needs of cancer patients, focusing on both clinical efficacy and affordability. Green drives the development of innovative care solutions that bridge the gap between primary care and specialized oncology treatment. Through clinical leadership, the President & Chief Medical Officer maintains the company's commitment to high-quality, patient-centered care across all regional operations.

    Jessa Kelley - Chief of Staff

    Jessa Kelley, the Chief of Staff at Thyme Care, manages internal organizational alignment and cross-functional communication. Kelley synchronizes the efforts of various departments to ensure that the company mission remains the primary focus during rapid scaling. By streamlining executive workflows, the Chief of Staff enables efficient decision-making processes across the entire organization. Kelley facilitates communication between leadership and operational teams to maintain consistency in service delivery. This role involves monitoring key performance indicators to track the success of oncology navigation initiatives. Jessa Kelley drives internal initiatives that support the company's commitment to transforming the cancer journey. Kelley optimizes resource allocation to ensure that every team member contributes effectively to the broader goal of improving member outcomes. Through meticulous planning and execution, the Chief of Staff strengthens the internal infrastructure, allowing the company to deliver high-quality, coordinated care solutions to health plans and oncology groups nationwide.
    Michael Markowicz, the Chief Legal Officer at Thyme Care, directs all legal, regulatory, and compliance strategies. Markowicz architects the framework for data privacy and healthcare regulations to ensure that virtual navigation services meet all industry standards. By managing complex contractual relationships with health plans and oncology groups, the Chief Legal Officer protects the company's interests while fostering collaborative partnerships. Markowicz oversees risk management protocols to safeguard member information and maintain operational integrity. This role involves navigating the evolving landscape of healthcare law to support the company's innovative care models. Michael Markowicz provides critical guidance on governance and policy to ensure ethical business practices. Markowicz drives the legal strategy that enables the company to expand its market presence while adhering to strict compliance requirements. Through proactive legal oversight, the Chief Legal Officer secures the foundation upon which the company builds its mission to improve cancer care outcomes and affordability for all members.
    Michael Markowicz

    Explore Leadership Teams in Healthcare Services

    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.