Zinnia Executive and Leadership Team

July, 2026

Leadership Overview

Zinnia has 7 executives leading key functions including strategy, human resources, and operations.

Driven by innovation, Zinnia is dedicated to advancing patient care and operational efficiency within the healthcare and wellness sectors through cutting-edge solutions.

Leadership Roles at Zinnia

  • Chief Executive Officer - George Esposito
  • Founder & Chief Executive Officer - Eldana Sime
  • Chief of Staff - Callie Thomas
  • Chief Human Resources Officer - Elaine Page
  • Director, Chief of Staff - David Siebold
  • Operations Chief of Staff - Gregory Heinen
  • Chief People Officer, Se2 - Errol Williams
  • George Esposito - Chief Executive Officer

    George Esposito, the Chief Executive Officer at Zinnia, directs the overarching corporate strategy and vision. Esposito guides Zinnia's expansion within the healthcare and wellness technology markets, ensuring alignment with the company's mission to enhance patient care and operational efficiency. This leadership involves fostering innovation across all departments and driving the development of groundbreaking solutions. George Esposito's strategic oversight ensures Zinnia maintains its competitive edge by anticipating industry trends and adapting its service offerings. The Chief Executive Officer's role is pivotal in shaping Zinnia's market position and achieving sustainable growth through technological advancement and client-focused initiatives. Esposito's leadership ensures the company consistently delivers value to its stakeholders and partners.
    George Esposito

    Eldana Sime - Founder & Chief Executive Officer

    Eldana Sime, the Founder & Chief Executive Officer at Zinnia, establishes the foundational principles and long-term direction for the company. Sime's entrepreneurial vision drives Zinnia's commitment to revolutionizing healthcare and wellness through innovative solutions. The Founder & Chief Executive Officer's responsibilities encompass setting strategic priorities, cultivating a culture of innovation, and ensuring the company's offerings directly address critical needs in patient care and operational efficiency. Eldana Sime's deep understanding of the industry fuels Zinnia's ability to develop and deploy impactful technologies. This executive leadership ensures Zinnia remains at the forefront of technological advancement, consistently delivering enhanced value and improved outcomes for clients and patients alike. Sime's dedication shapes the company's trajectory and market influence.

    Callie Thomas - Chief of Staff

    Callie Thomas, the Chief of Staff at Zinnia, provides critical support to executive leadership, streamlining operations and driving strategic initiatives. Thomas manages cross-functional projects, ensuring seamless execution of Zinnia's goals in healthcare and wellness technology. The Chief of Staff's role involves enhancing communication channels between departments and facilitating the implementation of new strategies aimed at improving patient care and operational efficiency. Callie Thomas's organizational acumen ensures that executive priorities are translated into actionable plans, optimizing resource allocation and project timelines. This position is essential for maintaining momentum on key company objectives and supporting the overall strategic direction set by the executive team. Thomas's contributions are vital to Zinnia's agile response to market demands.

    Elaine Page - Chief Human Resources Officer

    Elaine Page, the Chief Human Resources Officer at Zinnia, leads all human capital strategies, fostering a high-performance culture aligned with the company's mission. Page oversees talent acquisition, development, and retention initiatives, ensuring Zinnia attracts and retains top talent in the competitive healthcare and wellness technology landscape. The Chief Human Resources Officer's responsibilities include developing comprehensive compensation and benefits programs, implementing employee engagement strategies, and ensuring compliance with labor laws. Elaine Page's expertise is crucial in building a robust organizational structure that supports Zinnia's growth and innovation objectives. This executive ensures that Zinnia's workforce is equipped to deliver exceptional patient care and drive operational efficiency through effective people management. Page's leadership cultivates an environment where employees can thrive and contribute to the company's success.
    Elaine Page

    David Siebold - Director, Chief of Staff

    David Siebold, the Director, Chief of Staff at Zinnia, supports the executive team in executing strategic priorities and enhancing operational effectiveness. Siebold focuses on project management and process optimization, ensuring Zinnia's initiatives in healthcare and wellness technology advance smoothly. The Director, Chief of Staff's role involves coordinating efforts across various departments to achieve key performance indicators related to patient care and operational efficiency. David Siebold's analytical skills and attention to detail are instrumental in identifying areas for improvement and implementing solutions that drive organizational success. This position plays a key part in translating high-level strategies into tangible operational outcomes, supporting the overall mission of Zinnia. Siebold's contributions facilitate efficient decision-making and execution.

    Gregory Heinen - Operations Chief of Staff

    Gregory Heinen, the Operations Chief of Staff at Zinnia, drives operational excellence and efficiency across the organization. Heinen focuses on refining internal processes and systems to support Zinnia's commitment to enhancing patient care and operational efficiency within the healthcare and wellness sectors. The Operations Chief of Staff's responsibilities include overseeing the implementation of operational strategies, managing key projects, and ensuring seamless coordination between different operational units. Gregory Heinen's leadership ensures that Zinnia's operational framework is robust, scalable, and aligned with its strategic objectives. This role is critical for optimizing resource utilization and improving the delivery of Zinnia's innovative solutions. Heinen's work directly impacts the company's ability to achieve its mission.

    Errol Williams - Chief People Officer, Se2

    Errol Williams, the Chief People Officer, Se2 at Zinnia, leads the human resources function with a focus on talent management and organizational development. Williams is dedicated to cultivating a supportive and productive work environment that aligns with Zinnia's goals in healthcare and wellness innovation. The Chief People Officer, Se2's responsibilities include shaping employee culture, implementing effective HR policies, and driving initiatives that enhance employee engagement and retention. Errol Williams's strategic approach to people operations ensures that Zinnia possesses the skilled workforce necessary to advance patient care and operational efficiency. This executive leadership is vital for building a cohesive and motivated team capable of executing Zinnia's ambitious vision. Williams's expertise strengthens the company's human capital.

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    Frequently Asked Questions Regarding Zinnia Top Executives and Leadership Team

    Who leads Zinnia?
    Zinnia is led by George Esposito (Chief Executive Officer), along with executives such as Eldana Sime (Founder & Chief Executive Officer) and Callie Thomas (Chief of Staff).
    Who is part of Zinnia’s executive team?
    The executive team of Zinnia includes leaders such as George Esposito (Chief Executive Officer), Eldana Sime (Founder & Chief Executive Officer), Callie Thomas (Chief of Staff) and other senior executives.
    How many executives does Zinnia have?
    Zinnia has 7 executives leading key business areas.
    What roles are included in Zinnia’s leadership team?
    The leadership team of Zinnia includes roles such as Chief Executive Officer, Founder & Chief Executive Officer, Chief of Staff, Chief Human Resources Officer, Director, Chief of Staff.