Trinity Health Michigan Executive and Leadership Team

May, 2026

Leadership Overview

Trinity Health Michigan has 10 executives leading key functions including strategy, operations, information technology, and medical affairs.

Driven by a commitment to lifelong care, Trinity Health Michigan delivers personalized medical care and comprehensive health services across western and other regions of Michigan, expanding services and technology through community contributions and investments.

Leadership Roles at Trinity Health Michigan

  • Chief Executive Officer - Nancy Graebner
  • President & Chief Executive Officer, Trinity Health Michigan & Southeast Regions - Robert Casalou
  • Chief Executive Officer & Administrator - Richard Thomason
  • Vice President Chief Operating Officer Physician Enterprise - Bradley Whipple
  • Chief of Staff - Laurie Garms
  • Chief Information Officer - Randi Oehlers
  • Vice Chief of Staff - Anthony Bozaan
  • Vice Chief of Staff - Sangeetha Nanthabalan
  • Senior Vice President, Chief Marketing Officer - Paul Manternach
  • Chief Medical Officer - Jerry Sanders
  • Nancy Graebner - Chief Executive Officer

    Nancy Graebner, the Chief Executive Officer at Trinity Health Michigan, directs the overarching strategy and operational execution for the integrated health care organization. Graebner's leadership guides the delivery of personalized medical care and comprehensive health services across western and other regions of Michigan, ensuring alignment with the organization's mission. This executive role involves overseeing the network of hospitals, treatment facilities, urgent-care facilities, and physician practices that form the core of Trinity Health Michigan's service delivery. Graebner's focus includes driving growth and innovation, expanding services, technology, and treatment options to meet community needs. The Chief Executive Officer ensures that Trinity Health Michigan provides trusted, lifelong care, maintaining accessible and convenient health care delivery throughout the state. Nancy Graebner's strategic vision is critical to the organization's commitment to enhancing patient outcomes and community well-being, solidifying its position as a leading healthcare provider in Michigan.

    Robert Casalou - President & Chief Executive Officer, Trinity Health Michigan & Southeast Regions

    Robert Casalou, the President & Chief Executive Officer, Trinity Health Michigan & Southeast Regions at Trinity Health Michigan, commands the strategic direction and operational oversight for both the Michigan and Southeast regions. Casalou's dual leadership role encompasses driving the integrated health care delivery system's mission, ensuring comprehensive health services and personalized medical care are delivered effectively across diverse communities. This executive position involves managing a broad portfolio of hospitals, treatment facilities, urgent-care centers, and physician practices, fostering collaboration and synergy between these entities. Robert Casalou's responsibilities include spearheading initiatives for service expansion, technological advancement, and treatment innovation, directly impacting the organization's ability to provide lifelong, trusted care. The President & Chief Executive Officer, Trinity Health Michigan & Southeast Regions champions accessible and convenient healthcare, ensuring patients receive quality services close to home. Casalou's leadership is pivotal in maintaining Trinity Health Michigan's commitment to community health and its standing as a significant healthcare provider.

    Richard Thomason - Chief Executive Officer & Administrator

    Richard Thomason, the Chief Executive Officer & Administrator at Trinity Health Michigan, directs the strategic operations and administrative functions for the health system. Thomason's leadership ensures the effective management of hospitals, treatment facilities, urgent-care centers, and physician practices, delivering personalized medical care and comprehensive health services across Michigan. This executive role involves overseeing the integration of services and the expansion of treatment options to meet evolving community needs. Richard Thomason is responsible for maintaining the organization's commitment to providing trusted, lifelong care and ensuring accessible, convenient healthcare delivery throughout the state. The Chief Executive Officer & Administrator drives operational efficiency and strategic growth, supporting Trinity Health Michigan's mission to enhance patient outcomes and community well-being. Thomason's administrative acumen is crucial for the continued success and expansion of the organization's healthcare network.

    Bradley Whipple - Vice President Chief Operating Officer Physician Enterprise

    Bradley Whipple, the Vice President Chief Operating Officer Physician Enterprise at Trinity Health Michigan, directs the operational strategy and execution for the physician enterprise, ensuring alignment with the organization's broader healthcare mission. Whipple oversees the day-to-day management of physician practices and related clinical operations, focusing on delivering high-quality, personalized medical care and comprehensive health services. This executive role is critical for optimizing physician practice performance, driving efficiency, and supporting the expansion of services and treatment options available to patients. Bradley Whipple ensures that the physician enterprise operates seamlessly, contributing to accessible and convenient healthcare delivery throughout Michigan. The Vice President Chief Operating Officer Physician Enterprise's leadership is essential for fostering physician engagement, enhancing patient satisfaction, and upholding Trinity Health Michigan's commitment to providing trusted, lifelong care.

    Laurie Garms - Chief of Staff

    Laurie Garms, the Chief of Staff at Trinity Health Michigan, provides critical support and strategic counsel to the executive leadership team, ensuring seamless operations and alignment across the organization. Garms' role involves facilitating communication and collaboration between various departments, including hospitals, treatment facilities, and physician practices, to enhance the delivery of personalized medical care. This executive position focuses on optimizing internal processes and supporting the implementation of strategic initiatives aimed at expanding services and treatment options. Laurie Garms plays a key part in ensuring that Trinity Health Michigan upholds its commitment to providing trusted, lifelong care and maintaining accessible, convenient healthcare delivery throughout the state. The Chief of Staff's influence extends to supporting the organization's mission of community well-being and operational excellence, contributing significantly to the overall effectiveness of the healthcare network.

    Randi Oehlers - Chief Information Officer

    Randi Oehlers, the Chief Information Officer at Trinity Health Michigan, architects and directs the organization's technology strategy, ensuring robust and secure information systems support the delivery of comprehensive health services. Oehlers oversees the implementation and management of digital infrastructure, including electronic health records, data analytics platforms, and cybersecurity measures, crucial for personalized medical care. This executive role is vital for driving technological innovation, enabling the expansion of services, technology, and treatment options across Trinity Health Michigan's network of hospitals and facilities. Randi Oehlers ensures that information systems facilitate accessible and convenient healthcare delivery, supporting the organization's mission to provide trusted, lifelong care. The Chief Information Officer's leadership is instrumental in leveraging technology to improve patient outcomes, enhance operational efficiency, and maintain the organization's competitive edge in the healthcare landscape.

    Anthony Bozaan - Vice Chief of Staff

    Anthony Bozaan, the Vice Chief of Staff at Trinity Health Michigan, collaborates closely with the Chief of Staff and executive leadership to advance the organization's clinical and operational objectives. Bozaan's responsibilities include supporting initiatives that enhance the delivery of personalized medical care and comprehensive health services across the state's diverse communities. This role involves contributing to strategic planning and operational improvements within the network of hospitals, treatment facilities, and physician practices. Anthony Bozaan assists in ensuring the seamless integration of services and the effective implementation of new treatment options, reinforcing Trinity Health Michigan's commitment to providing trusted, lifelong care. The Vice Chief of Staff plays a supportive yet crucial part in maintaining accessible and convenient healthcare delivery, contributing to the organization's mission of community well-being and patient-centered service.

    Sangeetha Nanthabalan - Vice Chief of Staff

    Sangeetha Nanthabalan, the Vice Chief of Staff at Trinity Health Michigan, partners with the Chief of Staff and senior leadership to advance clinical excellence and operational effectiveness across the health system. Nanthabalan contributes to strategic planning and the implementation of programs designed to enhance personalized medical care and comprehensive health services. This executive position supports the coordination of efforts among hospitals, treatment facilities, and physician practices, ensuring integrated care delivery. Sangeetha Nanthabalan aids in the development and deployment of innovative treatment options, reinforcing Trinity Health Michigan's dedication to providing trusted, lifelong care. The Vice Chief of Staff's involvement is key to maintaining accessible and convenient healthcare access, supporting the organization's overarching goal of community health improvement and patient advocacy.

    Paul Manternach - Senior Vice President, Chief Marketing Officer

    Paul Manternach, the Senior Vice President, Chief Marketing Officer at Trinity Health Michigan, leads the strategic development and execution of all marketing and communications initiatives to enhance brand visibility and patient engagement. Manternach oversees the promotion of personalized medical care and comprehensive health services, ensuring effective outreach to communities across Michigan. This executive role is pivotal in driving patient acquisition and retention strategies, supporting the expansion of services, technology, and treatment options. Paul Manternach ensures that marketing efforts align with Trinity Health Michigan's mission to provide trusted, lifelong care and maintain accessible, convenient healthcare delivery. The Senior Vice President, Chief Marketing Officer's expertise is crucial for communicating the organization's value proposition, fostering community relationships, and strengthening its position as a leading healthcare provider.
    Paul Manternach

    Jerry Sanders - Chief Medical Officer

    Jerry Sanders, the Chief Medical Officer at Trinity Health Michigan, provides clinical leadership and strategic direction to ensure the highest standards of patient care and medical excellence across the organization. Sanders oversees clinical quality initiatives, patient safety programs, and the integration of evidence-based practices throughout the network of hospitals, treatment facilities, and physician practices. This executive role is essential for guiding the development and implementation of advanced treatment options and ensuring the delivery of personalized medical care. Jerry Sanders champions initiatives that enhance accessible and convenient healthcare delivery, reinforcing Trinity Health Michigan's commitment to providing trusted, lifelong care. The Chief Medical Officer's clinical expertise is fundamental to improving patient outcomes, driving clinical innovation, and upholding the organization's mission of community health and well-being.

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    Frequently Asked Questions Regarding Trinity Health Michigan Top Executives and Leadership Team

    Who leads Trinity Health Michigan?
    Trinity Health Michigan is led by Nancy Graebner (Chief Executive Officer), along with executives such as Robert Casalou (President & Chief Executive Officer, Trinity Health Michigan & Southeast Regions) and Richard Thomason (Chief Executive Officer & Administrator).
    Who is part of Trinity Health Michigan’s executive team?
    The executive team of Trinity Health Michigan includes leaders such as Nancy Graebner (Chief Executive Officer), Robert Casalou (President & Chief Executive Officer, Trinity Health Michigan & Southeast Regions), Richard Thomason (Chief Executive Officer & Administrator) and other senior executives.
    How many executives does Trinity Health Michigan have?
    Trinity Health Michigan has 10 executives leading key business areas.
    What roles are included in Trinity Health Michigan’s leadership team?
    The leadership team of Trinity Health Michigan includes roles such as Chief Executive Officer, President & Chief Executive Officer, Trinity Health Michigan & Southeast Regions, Chief Executive Officer & Administrator, Vice President Chief Operating Officer Physician Enterprise, Chief of Staff.