ThedaCare Executive and Leadership Team

May, 2026

Leadership Overview

ThedaCare has 9 executives leading key functions including operations, information technology, strategy, clinical transformation, acute care, post-acute care, emergency medicine, and ambulatory care.

Driven by a commitment to community well-being, ThedaCare advances patient care through integrated health services, focusing on comprehensive treatment programs and a robust level II trauma center to enhance the health of the region.

Leadership Roles at ThedaCare

  • Vice President and Chief Operating Officer ThedaCare Physicians - Quentin Mayer
  • President - Lynn Detterman
  • President - Raymond Georgen
  • Senior VP & Chief Information Officer - Brian Sterns
  • Associate Chief Medical Officer, Leadership Development & Clinical Transformation - Zachary Baeseman
  • Vice President & Chief Medical Officer, Acute Care - Michael Hooker
  • Associate Chief Medical Officer, Post Acute - Timothy Jessick
  • Associate Chief Medical Officer, Thedacare, Emergency Medicine - William Kumprey
  • Vice President Chief Medical Officer of Ambulatory Care - Dirk Steinert
  • Quentin Mayer - Vice President and Chief Operating Officer ThedaCare Physicians

    Quentin Mayer, the Vice President and Chief Operating Officer ThedaCare Physicians at ThedaCare, directs the operational execution across all physician practices. Mayer oversees the strategic deployment of resources, ensuring efficient patient flow and optimal service delivery within ThedaCare's extensive network of medical professionals. This leadership role involves enhancing the integration of clinical services, driving operational improvements, and supporting the expansion of physician-led care models. Mayer's focus centers on optimizing the physician experience and patient access to high-quality healthcare services. By streamlining workflows and implementing best practices, Quentin Mayer ensures that ThedaCare Physicians consistently meet and exceed patient expectations, contributing directly to the organization's mission of improving the health of the communities it serves. The operational scope includes managing budgets, staff, and the overall performance metrics for all physician groups.
    Quentin Mayer

    Lynn Detterman - President

    Lynn Detterman, the President at ThedaCare, drives the strategic vision and overall direction of the healthcare organization. Detterman leads executive teams in advancing ThedaCare's mission to improve the health of its communities through comprehensive medical services, including its level II trauma center and specialized cardiac and stroke programs. This leadership position involves fostering a culture of excellence, ensuring financial sustainability, and expanding access to high-quality care across Wisconsin. Detterman's oversight extends to key strategic initiatives, operational performance, and stakeholder relations, guiding ThedaCare's growth and impact. By championing innovation and patient-centered care, Lynn Detterman ensures the organization's continued success in delivering advanced healthcare solutions and maintaining its position as a leading regional provider. The role encompasses ultimate accountability for all organizational functions and strategic planning.
    Lynn Detterman

    Raymond Georgen - President

    Raymond Georgen, the President at ThedaCare, guides the strategic direction and operational excellence of the health system. Georgen leads efforts to enhance patient care services, including the organization's renowned trauma center and specialized cardiac and stroke programs, ensuring ThedaCare meets the evolving healthcare needs of its communities. This executive position involves fostering strong relationships with medical staff, community partners, and regulatory bodies to advance the organization's mission. Georgen's leadership focuses on driving innovation in healthcare delivery, optimizing resource allocation, and ensuring the highest standards of quality and safety. By championing strategic growth and operational efficiency, Raymond Georgen reinforces ThedaCare's commitment to providing accessible, high-quality medical care and improving population health outcomes across Wisconsin. The responsibilities include overseeing strategic planning and organizational development.
    Raymond Georgen

    Brian Sterns - Senior VP & Chief Information Officer

    Brian Sterns, the Senior VP & Chief Information Officer at ThedaCare, architects the organization's technology strategy and digital infrastructure. Sterns directs the implementation of innovative IT solutions that support clinical operations, enhance patient care, and drive operational efficiency across ThedaCare's facilities. This critical role involves overseeing data security, electronic health records management, and the integration of advanced technological systems to facilitate seamless information exchange. Sterns's leadership ensures that ThedaCare remains at the forefront of healthcare technology, enabling better patient outcomes and improved administrative processes. By championing digital transformation, Brian Sterns empowers clinicians with the tools needed for effective diagnosis and treatment, reinforcing the organization's commitment to providing advanced medical services. The scope includes managing all IT departments, cybersecurity initiatives, and technology investments.
    Brian Sterns

    Zachary Baeseman - Associate Chief Medical Officer, Leadership Development & Clinical Transformation

    Zachary Baeseman, the Associate Chief Medical Officer, Leadership Development & Clinical Transformation at ThedaCare, spearheads initiatives focused on enhancing clinical practices and cultivating leadership talent. Baeseman directs programs designed to foster continuous improvement in patient care delivery, ensuring that ThedaCare's clinical teams are equipped with the latest advancements and methodologies. This role is pivotal in driving clinical transformation, optimizing patient outcomes, and promoting evidence-based medicine across the organization. Baeseman's efforts contribute significantly to ThedaCare's commitment to providing exceptional stroke, cardiac, and comprehensive cancer treatments. By focusing on leadership development, Zachary Baeseman cultivates a robust pipeline of medical professionals capable of guiding the organization's future growth and maintaining its high standards of care. The focus includes developing training programs and implementing new clinical protocols.

    Michael Hooker - Vice President & Chief Medical Officer, Acute Care

    Michael Hooker, the Vice President & Chief Medical Officer, Acute Care at ThedaCare, directs the medical strategy and clinical operations for acute care services. Hooker oversees the delivery of critical medical interventions, including those provided at the level II trauma center and for cardiac and stroke patients, ensuring the highest standards of patient care. This leadership role involves collaborating with medical staff to implement best practices, enhance patient safety, and drive clinical excellence across all acute care settings. Hooker's focus is on optimizing the patient experience and outcomes during critical periods of care. By leading the medical teams in acute care, Michael Hooker ensures that ThedaCare provides timely, effective, and compassionate treatment, reinforcing the organization's commitment to saving lives and improving health. The scope includes managing medical staff within acute care units and overseeing quality improvement initiatives.

    Timothy Jessick - Associate Chief Medical Officer, Post Acute

    Timothy Jessick, the Associate Chief Medical Officer, Post Acute at ThedaCare, leads the strategic development and operational oversight of post-acute care services. Jessick directs the integration of comprehensive rehabilitation and recovery programs, ensuring seamless transitions for patients moving from acute care to continued recovery. This role is crucial in enhancing patient outcomes and supporting long-term wellness through specialized post-acute interventions. Jessick's efforts focus on optimizing the patient journey, improving care coordination, and expanding access to essential post-acute services. By championing innovative approaches to recovery, Timothy Jessick ensures that ThedaCare provides continuous, high-quality care that supports patients' full return to health and community life. The responsibilities include managing post-acute facilities and developing patient care pathways.

    William Kumprey - Associate Chief Medical Officer, Thedacare, Emergency Medicine

    William Kumprey, the Associate Chief Medical Officer, Thedacare, Emergency Medicine at ThedaCare, directs the clinical operations and strategic initiatives within the emergency medicine department. Kumprey oversees the provision of immediate, life-saving care, ensuring the highest standards of treatment and patient safety in critical situations, particularly within the level II trauma center. This leadership position involves enhancing emergency response protocols, optimizing patient flow, and fostering collaboration among emergency medical teams. Kumprey's focus is on delivering rapid, effective care and improving patient outcomes during medical emergencies. By leading the emergency medicine division, William Kumprey ensures ThedaCare's readiness to handle critical medical events and provide exceptional care when it is needed most. The scope includes managing emergency department staff and implementing new treatment protocols.

    Dirk Steinert - Vice President Chief Medical Officer of Ambulatory Care

    Dirk Steinert, the Vice President Chief Medical Officer of Ambulatory Care at ThedaCare, leads the strategic vision and operational management of outpatient services. Steinert directs the enhancement of patient access and the delivery of high-quality care across ThedaCare's network of clinics and outpatient facilities. This executive role involves fostering clinical excellence, driving innovation in ambulatory settings, and ensuring seamless integration with other healthcare services. Steinert's leadership focuses on optimizing the patient experience and improving health outcomes through accessible, community-based care. By championing advancements in ambulatory medicine, Dirk Steinert reinforces ThedaCare's commitment to proactive health management and comprehensive patient support throughout their healthcare journey. The responsibilities include overseeing all outpatient clinics and developing new ambulatory service lines.

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    Frequently Asked Questions Regarding ThedaCare Top Executives and Leadership Team

    Who leads ThedaCare?
    ThedaCare is led by Quentin Mayer (Vice President and Chief Operating Officer ThedaCare Physicians), along with executives such as Lynn Detterman (President) and Raymond Georgen (President).
    Who is part of ThedaCare’s executive team?
    The executive team of ThedaCare includes leaders such as Quentin Mayer (Vice President and Chief Operating Officer ThedaCare Physicians), Lynn Detterman (President), Raymond Georgen (President) and other senior executives.
    How many executives does ThedaCare have?
    ThedaCare has 9 executives leading key business areas.
    What roles are included in ThedaCare’s leadership team?
    The leadership team of ThedaCare includes roles such as Vice President and Chief Operating Officer ThedaCare Physicians, President, President, Senior VP & Chief Information Officer, Associate Chief Medical Officer, Leadership Development & Clinical Transformation.