HarmonyCares Executive and Leadership Team

May, 2026

Leadership Overview

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

Driven by a commitment to accessible and compassionate care, HarmonyCares redefines personalized, home-based medical services, delivering comprehensive support directly to individuals with complex clinical needs and solidifying its position as the nation's largest provider of in-home physician services.

Leadership Roles at HarmonyCares

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

    Zachary Mulligan, the Chief Financial Officer at HarmonyCares, directs all financial strategy and operations. Mulligan oversees budgeting, financial planning, and resource allocation, ensuring fiscal health and sustainable growth. This leadership role involves managing investment portfolios, optimizing capital structure, and driving profitability through rigorous financial analysis. By maintaining strong relationships with financial institutions and stakeholders, Mulligan secures the necessary capital to support the organization's expansion and operational needs. The Chief Financial Officer's oversight extends to risk management and compliance, safeguarding the company's assets and ensuring adherence to all financial regulations. Mulligan's strategic financial guidance is critical for executing the company's mission of providing accessible, quality care. This executive ensures financial stability, enabling HarmonyCares to serve more individuals with complex medical conditions across the nation. Mulligan's expertise underpins the organization's ability to innovate and scale its value-based care model effectively.
    Zachary Mulligan

    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 acts as a key liaison between executive leadership and various departments, ensuring seamless communication and alignment with company objectives. This role involves managing cross-functional projects, driving process improvements, and supporting the implementation of new programs designed to enhance patient care and operational effectiveness. By facilitating strategic planning sessions and tracking key performance indicators, Estopinal ensures that HarmonyCares remains focused on its mission. The Chief of Staff's responsibilities include streamlining workflows, identifying areas for innovation, and supporting the executive team in decision-making processes. Estopinal's contribution is vital for translating the company's vision into actionable plans, particularly in expanding its reach and impact within communities. This leadership position requires a deep understanding of the healthcare landscape and a commitment to operational excellence, directly supporting the delivery of high-quality, personalized healthcare.

    Tharika Chandrasekhar - Chief of Staff, Technology

    Tharika Chandrasekhar, the Chief of Staff, Technology at HarmonyCares, drives the strategic direction and execution of technology initiatives. Chandrasekhar oversees the integration of innovative technological solutions that enhance the delivery of in-home medical care and improve patient outcomes. This leadership role involves collaborating with engineering, product development, and IT teams to ensure technology platforms are scalable, secure, and aligned with the organization's value-based care model. By identifying emerging technologies and assessing their potential impact, Chandrasekhar champions digital transformation efforts. The Chief of Staff, Technology's focus extends to optimizing data management, cybersecurity, and the overall technological infrastructure that supports clinical operations. Chandrasekhar's strategic vision ensures that HarmonyCares leverages technology to make care more accessible and efficient for individuals with complex clinical needs. This executive's work is fundamental to maintaining the organization's position as a leader in home-based healthcare technology.

    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 high-performing organizational culture that aligns with the company's mission of providing compassionate care. This role involves overseeing recruitment, employee development, compensation and benefits, and fostering an environment where clinical teams can thrive. By implementing robust HR policies and programs, Johnson ensures that HarmonyCares attracts and retains top talent, crucial for delivering quality in-home physician services. The Chief People Officer's strategic focus includes employee engagement, diversity and inclusion initiatives, and ensuring compliance with labor laws. Johnson's leadership is instrumental in building a dedicated workforce committed to serving individuals with complex medical conditions. This executive's efforts directly impact the organization's ability to scale its operations and maintain its reputation for excellence in patient care.
    Heidi Johnson

    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 medical operations, guiding clinical teams in delivering comprehensive, personalized healthcare directly to patients' homes. This leadership position involves setting clinical protocols, driving quality improvement initiatives, and ensuring that the value-based care model effectively addresses the needs of individuals with complex medical conditions. By championing evidence-based practices and fostering a culture of clinical excellence, Millie enhances patient outcomes and satisfaction. The Chief Medical Officer's responsibilities include physician recruitment and development, medical staff credentialing, and ensuring compliance with all healthcare regulations. Millie's clinical expertise is fundamental to HarmonyCares' mission of making quality care accessible and compassionate. This executive's vision shapes the delivery of services, reinforcing the organization's role as the nation's largest provider of in-home physician services.
    Michael Millie

    Rupen Amin - Senior Vice President - Regional Chief Medical Officer

    Rupen Amin, the Senior Vice President - Regional Chief Medical Officer at HarmonyCares, spearheads clinical leadership and operational oversight across designated regions. Amin focuses on ensuring the consistent delivery of high-quality, personalized in-home medical care, adapting clinical strategies to meet diverse community needs. This role involves managing regional medical teams, implementing standardized clinical practices, and driving performance improvements to enhance patient outcomes. By fostering strong relationships with local healthcare providers and stakeholders, Amin strengthens HarmonyCares' presence and impact. The Senior Vice President - Regional Chief Medical Officer's responsibilities include overseeing quality assurance, patient safety initiatives, and ensuring adherence to the organization's value-based care principles within their assigned territories. Amin's leadership is critical for expanding the organization's reach and maintaining its commitment to accessible healthcare for individuals facing complex clinical conditions. This executive's regional focus ensures localized effectiveness of the national care model.

    Explore Leadership Teams in Elderly Care Services

    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 Elissa Estopinal (Vice President, Chief of Staff) and Tharika Chandrasekhar (Chief of Staff, Technology).
    Who is part of HarmonyCares’s executive team?
    The executive team of HarmonyCares includes leaders such as Zachary Mulligan (Chief Financial Officer), Elissa Estopinal (Vice President, Chief of Staff), Tharika Chandrasekhar (Chief of Staff, Technology) 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, Vice President, Chief of Staff, Chief of Staff, Technology, Chief People Officer, Chief Medical Officer.