Zinnia Executive and Leadership Team

August, 2026

Leadership Overview

Zinnia has 9 executives leading key functions including strategy, financial oversight, human resources, and technology development.

Committed to advancing healthcare outcomes, Zinnia delivers innovative software solutions that optimize patient care and streamline operational efficiency across the global wellness landscape.

Leadership Roles at Zinnia

  • Chief Executive Officer - George Esposito
  • Founder & Chief Executive Officer - Eldana Sime
  • Chief Financial Officer - Kihara Kiarie
  • Chief of Staff - Callie Thomas
  • Chief Human Resources Officer - Elaine Page
  • Director, Chief of Staff - David Siebold
  • Operations Chief of Staff - Gregory Heinen
  • Chief Technology Officer (India) - Pawan Choudhary
  • Chief People Officer, Se2 - Errol Williams
  • George Esposito - Chief Executive Officer

    George Esposito, the Chief Executive Officer at Zinnia, directs the overarching corporate strategy to enhance healthcare delivery through advanced software platforms. Esposito architects long-term growth initiatives while ensuring the organization maintains a competitive edge in the wellness technology sector. By aligning product development with evolving market demands, the Chief Executive Officer drives operational excellence across all departments. This leadership role involves constant collaboration with the board to secure financial health and market expansion. George Esposito monitors key performance indicators to validate that every software solution meets rigorous industry standards for patient care. Through a focus on scalable infrastructure, the Chief Executive Officer empowers the entire organization to achieve superior outcomes. Ultimately, Esposito fosters a culture of innovation that positions the company as a leader in health-focused digital transformation, ensuring that all strategic objectives remain centered on improving patient experiences and operational efficiency.
    George Esposito

    Eldana Sime - Founder & Chief Executive Officer

    Eldana Sime, the Founder & Chief Executive Officer at Zinnia, establishes the foundational vision for transforming healthcare through digital innovation. Sime guides the company mission by prioritizing patient-centric software solutions that simplify complex wellness workflows. As the primary architect of the corporate culture, the Founder & Chief Executive Officer cultivates an environment dedicated to technological advancement and operational precision. This role requires balancing immediate market needs with future-looking research and development goals. Eldana Sime oversees the integration of new wellness technologies into existing healthcare frameworks to maximize impact. By maintaining strong relationships with key stakeholders, the Founder & Chief Executive Officer ensures that the organization remains agile in a rapidly changing industry. Sime drives the strategic direction of the firm, focusing on sustainable growth and the delivery of high-value software tools that empower healthcare providers to improve patient outcomes across diverse global markets.

    Kihara Kiarie - Chief Financial Officer

    Kihara Kiarie, the Chief Financial Officer at Zinnia, manages the fiscal health and capital allocation strategies necessary to support healthcare software development. Kiarie oversees all financial planning, budgeting, and reporting processes to ensure the company maintains robust liquidity for ongoing innovation. By analyzing market trends, the Chief Financial Officer identifies opportunities for investment in wellness technology that yield high returns. This leadership position involves coordinating with other executives to align departmental spending with the broader corporate mission of improving patient care. Kihara Kiarie directs the financial risk management framework, protecting the organization against volatility while supporting expansion into new regional markets. Through rigorous oversight of capital expenditures, the Chief Financial Officer ensures that resources flow efficiently toward high-impact projects. Kiarie maintains transparency with investors and stakeholders, providing the financial stability required for the company to continue delivering cutting-edge solutions that enhance operational efficiency within the healthcare sector.

    Callie Thomas - Chief of Staff

    Callie Thomas, the Chief of Staff at Zinnia, coordinates executive workflows and facilitates communication across the leadership team to ensure seamless operational execution. Thomas manages high-priority projects that bridge the gap between strategic planning and daily software development activities. By streamlining internal processes, the Chief of Staff enables the organization to respond rapidly to healthcare industry shifts. This role involves organizing cross-functional initiatives that support the company mission of enhancing patient care through technology. Callie Thomas monitors the progress of key corporate objectives, providing the necessary oversight to keep teams aligned with the broader business strategy. Through effective management of executive priorities, the Chief of Staff optimizes the time and focus of the leadership group. Thomas drives organizational efficiency by removing bottlenecks and fostering collaboration, ensuring that every department contributes effectively to the development of innovative wellness solutions that improve overall operational performance.

    Elaine Page - Chief Human Resources Officer

    Elaine Page, the Chief Human Resources Officer at Zinnia, designs and executes talent acquisition and retention strategies to support the company's healthcare software mission. Page oversees the development of a high-performance workforce capable of building complex wellness solutions. By implementing professional growth programs, the Chief Human Resources Officer ensures that the organization attracts top-tier engineering and clinical expertise. This leadership role involves fostering an inclusive culture that values innovation and patient-focused outcomes. Elaine Page manages organizational design and compensation structures to maintain competitiveness in the global technology market. Through the alignment of human capital with business goals, the Chief Human Resources Officer drives the productivity required to deliver high-quality software products. Page monitors employee engagement and performance metrics to ensure that the team remains motivated and focused on the company's core objective of enhancing patient care and operational efficiency across the healthcare landscape.
    Elaine Page

    David Siebold - Director, Chief of Staff

    David Siebold, the Director, Chief of Staff at Zinnia, manages the operational cadence of the executive office to ensure alignment with healthcare software development goals. Siebold directs the implementation of strategic initiatives that improve internal communication and project delivery timelines. By analyzing operational data, the Director, Chief of Staff identifies areas for process improvement that directly impact the efficiency of wellness software deployment. This role involves facilitating meetings and tracking the execution of key performance indicators across all departments. David Siebold supports the leadership team by providing actionable insights that inform decision-making regarding product roadmaps and market expansion. Through the coordination of complex cross-functional tasks, the Director, Chief of Staff ensures that the organization remains focused on its mission to enhance patient care. Siebold maintains a high standard of operational rigor, enabling the company to scale its innovative solutions effectively while meeting the evolving needs of the healthcare industry.

    Gregory Heinen - Operations Chief of Staff

    Gregory Heinen, the Operations Chief of Staff at Zinnia, oversees the logistical and procedural frameworks that support the delivery of healthcare software solutions. Heinen manages the integration of operational workflows to ensure that development teams remain focused on enhancing patient care. By optimizing internal systems, the Operations Chief of Staff drives efficiency in the product lifecycle, from initial design to final deployment. This role involves monitoring the performance of operational units to ensure alignment with the company's broader wellness technology strategy. Gregory Heinen coordinates with department heads to resolve bottlenecks and improve the speed of service delivery. Through the application of data-driven management techniques, the Operations Chief of Staff ensures that resources are utilized effectively to support the company's growth. Heinen maintains a clear focus on operational excellence, enabling the organization to provide reliable, high-quality software tools that improve patient outcomes and streamline healthcare operations globally.

    Pawan Choudhary - Chief Technology Officer (India)

    Pawan Choudhary, the Chief Technology Officer (India) at Zinnia, leads the engineering and software development teams responsible for building innovative healthcare platforms. Choudhary architects scalable cloud infrastructure that supports the company's mission of enhancing patient care through digital wellness tools. By overseeing the technical roadmap, the Chief Technology Officer (India) ensures that all software products meet the highest standards of security and performance. This role involves managing large-scale development projects that drive operational efficiency for healthcare providers. Pawan Choudhary fosters a culture of technical excellence, mentoring engineers to solve complex problems related to patient data management and wellness tracking. Through the strategic application of emerging technologies, the Chief Technology Officer (India) keeps the company at the forefront of the health software industry. Choudhary directs the technical operations in the region, ensuring that all development efforts align with the global strategy to improve patient outcomes and operational efficiency.

    Errol Williams - Chief People Officer, Se2

    Errol Williams, the Chief People Officer, Se2 at Zinnia, directs the human capital strategy for the Se2 division, focusing on building teams that drive healthcare software innovation. Williams architects talent development frameworks that empower employees to create solutions for improved patient care and operational efficiency. By managing organizational culture and performance management systems, the Chief People Officer, Se2 ensures that the workforce remains aligned with the company's mission. This role involves overseeing recruitment and retention efforts to secure the specialized skills required for wellness technology development. Errol Williams monitors employee satisfaction and productivity metrics to identify opportunities for organizational growth. Through the implementation of effective leadership training, the Chief People Officer, Se2 supports the development of a high-performing team capable of delivering complex software products. Williams maintains a focus on creating an environment where innovation thrives, ensuring that the company continues to provide high-value tools that enhance the healthcare experience.

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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 Kihara Kiarie (Chief Financial Officer).
    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), Kihara Kiarie (Chief Financial Officer) and other senior executives.
    How many executives does Zinnia have?
    Zinnia has 9 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 Financial Officer, Chief of Staff, Chief Human Resources Officer.