HarmonyCares Executive and Leadership Team

June, 2026

Leadership Overview

HarmonyCares has 6 executives leading key functions including finance, technology, operations, medical affairs, human resources, and regional medical strategy.

Driven by a singular vision that every person deserves access to quality care, HarmonyCares redefines personalized, home-based medical care by delivering comprehensive services directly to individuals with complex clinical needs, standing as the nation's largest provider of in-home physician services.

Leadership Roles at HarmonyCares

  • Chief Financial Officer - Zachary Mulligan
  • Chief of Staff, Technology - Tharika Chandrasekhar
  • Vice President, Chief of Staff - Elissa Estopinal
  • Chief Medical Officer - Michael Millie
  • Chief People Officer - Heidi Johnson
  • Regional Chief Medical Officer - Rupen Amin
  • Zachary Mulligan - Chief Financial Officer

    Zachary Mulligan, the Chief Financial Officer at HarmonyCares, directs all financial operations and strategic fiscal planning. Mulligan oversees budgeting, financial forecasting, and resource allocation, ensuring robust financial health across the organization. This leadership role involves managing investor relations and securing capital to support expansion initiatives. By optimizing financial processes, Zachary Mulligan drives profitability and sustains the company's value-based care model. The Chief Financial Officer's oversight extends to risk management and compliance, safeguarding the organization's assets and ensuring adherence to regulatory standards. Mulligan's strategic financial guidance is critical for maintaining the organization's position as the nation's largest provider of in-home physician services, particularly for individuals with complex medical conditions. This executive ensures financial stability to facilitate the delivery of accessible and compassionate healthcare directly to patients' homes, reinforcing the core mission of improving outcomes and creating meaningful moments for families.
    Zachary Mulligan

    Tharika Chandrasekhar - Chief of Staff, Technology

    Tharika Chandrasekhar, the Chief of Staff, Technology at HarmonyCares, spearheads technology strategy and operational execution. Chandrasekhar manages the integration of innovative technological solutions to enhance patient care delivery and streamline internal processes. This role involves collaborating with cross-functional teams to align technology roadmaps with the company's mission of accessible, quality healthcare. By driving digital transformation, Tharika Chandrasekhar ensures that technology supports the organization's growth and its commitment to serving individuals with complex clinical needs. The Chief of Staff, Technology's focus includes overseeing data analytics, cybersecurity, and the development of scalable IT infrastructure. Chandrasekhar's leadership is vital for maintaining HarmonyCares' competitive edge and its ability to provide personalized, home-based medical care. This executive's efforts directly contribute to improving patient outcomes and fostering stronger connections within communities through advanced technological support.

    Elissa Estopinal - Vice President, Chief of Staff

    Elissa Estopinal, the Vice President, Chief of Staff at HarmonyCares, orchestrates strategic initiatives and operational efficiency across the organization. Estopinal manages key projects, drives cross-departmental alignment, and ensures the effective implementation of the company's vision for accessible, quality care. This leadership position involves facilitating communication between executive leadership and various teams, fostering a cohesive work environment. By streamlining operations, Elissa Estopinal supports the delivery of comprehensive services directly to individuals with complex medical conditions. The Vice President, Chief of Staff's responsibilities include enhancing organizational effectiveness and supporting the company's evolution from its origins as a house call physician practice. Estopinal's strategic oversight is crucial for maintaining HarmonyCares' commitment to compassionate, home-based medical care. This executive's work directly impacts the organization's ability to create meaningful moments for families by ensuring seamless service delivery.

    Michael Millie - Chief Medical Officer

    Michael Millie, the Chief Medical Officer at HarmonyCares, directs clinical strategy and ensures the highest standards of patient care. Millie oversees the development and implementation of clinical protocols, focusing on delivering value-based care that improves health outcomes for individuals with complex medical needs. This role involves leading clinical teams, fostering a culture of excellence, and ensuring compassionate service delivery directly in patients' homes. By championing evidence-based practices, Michael Millie enhances the effectiveness of HarmonyCares' home-based medical services. The Chief Medical Officer's purview includes clinical quality assurance, physician engagement, and the integration of clinical insights into the organization's strategic planning. Millie's medical leadership is fundamental to the organization's mission of making quality care accessible. This executive's dedication ensures that families receive personalized and effective healthcare, reinforcing HarmonyCares' position as a leader in in-home physician services.
    Michael Millie

    Heidi Johnson - Chief People Officer

    Heidi Johnson, the Chief People Officer at HarmonyCares, leads all human resources functions and talent management strategies. Johnson is responsible for cultivating a supportive and engaging work environment that attracts and retains top clinical and administrative talent. This role involves developing comprehensive employee programs, overseeing compensation and benefits, and driving initiatives that align with the company's mission of accessible, quality care. By focusing on employee development, Heidi Johnson ensures that HarmonyCares' teams are equipped to provide compassionate and effective home-based medical services. The Chief People Officer's strategic direction is critical for fostering a culture that values patient well-being and professional growth. Johnson's leadership directly supports the organization's ability to serve individuals with complex medical conditions by building a strong, dedicated workforce. This executive's efforts are essential for maintaining the high level of personalized care HarmonyCares provides to families.
    Heidi Johnson

    Rupen Amin - Regional Chief Medical Officer

    Rupen Amin, the Regional Chief Medical Officer at HarmonyCares, oversees clinical operations and quality of care across designated geographic areas. Amin ensures the consistent delivery of high-quality, personalized medical services, adapting clinical strategies to meet regional needs and patient complexities. This leadership position involves managing physician networks, driving clinical excellence, and fostering strong relationships with local healthcare communities. By focusing on regional healthcare dynamics, Rupen Amin enhances HarmonyCares' ability to provide accessible care to diverse populations. The Regional Chief Medical Officer's responsibilities include implementing best practices, monitoring patient outcomes, and supporting the organization's value-based care model in specific markets. Amin's medical expertise is crucial for expanding the reach of home-based physician services. This executive's work directly contributes to improving health outcomes for individuals facing challenges in accessing traditional care settings, reinforcing the company's commitment to compassionate service.

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    Frequently Asked Questions Regarding HarmonyCares Top Executives and Leadership Team

    Who leads HarmonyCares?
    HarmonyCares is led by Zachary Mulligan (Chief Financial Officer), along with executives such as Tharika Chandrasekhar (Chief of Staff, Technology) and Elissa Estopinal (Vice President, Chief of Staff).
    Who is part of HarmonyCares’s executive team?
    The executive team of HarmonyCares includes leaders such as Zachary Mulligan (Chief Financial Officer), Tharika Chandrasekhar (Chief of Staff, Technology), Elissa Estopinal (Vice President, Chief of Staff) and other senior executives.
    How many executives does HarmonyCares have?
    HarmonyCares has 6 executives leading key business areas.
    What roles are included in HarmonyCares’s leadership team?
    The leadership team of HarmonyCares includes roles such as Chief Financial Officer, Chief of Staff, Technology, Vice President, Chief of Staff, Chief Medical Officer, Chief People Officer.