Centene Executive and Leadership Team

September, 2026

Leadership Overview

Centene has 10 executives leading key functions including strategy, market operations, administrative coordination, information technology, and financial management.

Committed to transforming community health, Centene delivers affordable, high-quality coverage to underserved populations across the United States through integrated, culturally sensitive care solutions that support physical, emotional, and social wellbeing.

Leadership Roles at Centene

  • Chief Executive Officer - Sarah London
  • Chief Executive Officer, Markets & Medicaid - Nathan Landsbaum
  • Chief Financial Officer, At Coordinated Care - Adam Ceteznik
  • Chief Financial Officer, Silver Summit Healthplan - Andre Cisne
  • Chief Financial Officer, Health Plan - Jeremy Peercy
  • Chief Operating Officer, Sunflower Health Plan - Sherilyn Fahlstrom
  • Chief of Staff - Amy Alberg
  • Senior Vice President and Chief Information Officer, Markets and Health Products (Medicaid, Marketplace, Medicare and Shared Services) - Ajoy Kodali
  • Vice President, Chief of Staff (External Affairs) - Arianna Muckerman
  • Chief Information Officer, Marketplace & Commercial - Scott Gaydos
  • Sarah London - Chief Executive Officer

    Sarah London, the Chief Executive Officer at Centene, directs the overarching strategic vision for this national healthcare enterprise. London architects long-term growth initiatives while ensuring the organization maintains its commitment to providing high-quality, affordable health coverage for millions of members. By overseeing the integration of Medicaid, Medicare, and commercial product lines, the Chief Executive Officer aligns corporate resources with the evolving needs of diverse populations across all 50 U.S. states. This leadership role involves constant collaboration with the Board to drive operational excellence and financial stability. Sarah London monitors market trends to identify opportunities for expanding access to care in underserved regions. Through rigorous oversight of organizational performance, the Chief Executive Officer fosters a culture of innovation and accountability. Ultimately, London secures the company's position as a leader in managed care by prioritizing member outcomes and sustainable business practices.
    Sarah London

    Nathan Landsbaum - Chief Executive Officer, Markets & Medicaid

    Nathan Landsbaum, the Chief Executive Officer, Markets & Medicaid at Centene, manages the operational delivery of healthcare services across the company's largest business segment. Landsbaum drives the execution of Medicaid managed care programs, ensuring compliance with state-specific requirements and federal standards. By overseeing regional market performance, the Chief Executive Officer, Markets & Medicaid optimizes the delivery of integrated care solutions to low-income families and individuals. This role requires constant coordination with state agencies to maintain high standards of service and accessibility. Nathan Landsbaum monitors enrollment trends and provider network adequacy to ensure consistent member support. Through strategic management of these complex health plans, the Chief Executive Officer, Markets & Medicaid strengthens the company's footprint in the public sector. Ultimately, Landsbaum improves health equity by scaling effective care models that address the unique social and physical needs of diverse communities nationwide.
    Nathan Landsbaum

    Adam Ceteznik - Chief Financial Officer, At Coordinated Care

    Adam Ceteznik, the Chief Financial Officer, At Coordinated Care at Centene, manages the fiscal health and budgetary planning for this specific regional health plan. Ceteznik oversees financial reporting, revenue cycle management, and cost-containment strategies to ensure the sustainability of care delivery. By analyzing medical loss ratios and operational expenses, the Chief Financial Officer, At Coordinated Care supports the company's mission of providing affordable coverage to local populations. This role involves collaborating with regional leadership to allocate resources effectively across various health programs. Adam Ceteznik monitors financial performance to identify opportunities for efficiency and growth within the regional market. Through rigorous fiscal oversight, the Chief Financial Officer, At Coordinated Care ensures that the health plan remains compliant with state regulations while meeting the needs of its members. Ultimately, Ceteznik maintains the financial integrity required to support the company's broader commitment to community health.

    Andre Cisne - Chief Financial Officer, Silver Summit Healthplan

    Andre Cisne, the Chief Financial Officer, Silver Summit Healthplan at Centene, directs the financial operations and strategic planning for this specific health plan entity. Cisne manages capital allocation, budgeting, and financial forecasting to ensure the plan meets its obligations to members and providers. By overseeing the financial health of the Silver Summit Healthplan, the Chief Financial Officer, Silver Summit Healthplan supports the company's goal of expanding access to quality care. This role involves monitoring market-specific financial risks and implementing strategies to mitigate them. Andre Cisne collaborates with operational leaders to optimize resource utilization and improve service delivery efficiency. Through precise financial analysis, the Chief Financial Officer, Silver Summit Healthplan ensures the long-term viability of the health plan's offerings. Ultimately, Cisne contributes to the company's nationwide success by maintaining strong financial performance and operational stability within this key regional market.

    Jeremy Peercy - Chief Financial Officer, Health Plan

    Jeremy Peercy, the Chief Financial Officer, Health Plan at Centene, oversees the financial management and economic strategy for the company's core health plan operations. Peercy directs the development of annual budgets, financial audits, and performance reporting to ensure alignment with corporate objectives. By managing the financial risks associated with large-scale managed care, the Chief Financial Officer, Health Plan supports the delivery of affordable services to millions of individuals. This role involves working closely with regional teams to optimize cost structures and improve the efficiency of care delivery. Jeremy Peercy monitors revenue streams and expenditure patterns to maintain the financial health of the organization. Through strategic financial planning, the Chief Financial Officer, Health Plan enables the company to continue its mission of serving underserved populations. Ultimately, Peercy ensures that the health plan maintains the necessary capital to support its extensive network of providers and members.

    Sherilyn Fahlstrom - Chief Operating Officer, Sunflower Health Plan

    Sherilyn Fahlstrom, the Chief Operating Officer, Sunflower Health Plan at Centene, directs the day-to-day operational activities for this specific health plan. Fahlstrom oversees provider network management, member services, and clinical operations to ensure high-quality care delivery. By managing the operational workflows of the Sunflower Health Plan, the Chief Operating Officer, Sunflower Health Plan supports the company's mission of providing integrated, culturally sensitive healthcare. This role involves coordinating with internal teams to improve service efficiency and member satisfaction. Sherilyn Fahlstrom monitors operational performance metrics to identify areas for process improvement and service expansion. Through effective leadership of the health plan's operations, the Chief Operating Officer, Sunflower Health Plan ensures that the organization meets the needs of its members effectively. Ultimately, Fahlstrom contributes to the company's overall success by maintaining high operational standards and fostering a culture of excellence within the regional health plan.

    Amy Alberg - Chief of Staff

    Amy Alberg, the Chief of Staff at Centene, facilitates executive decision-making and streamlines communication across the senior leadership team. Alberg coordinates cross-functional initiatives that support the company's mission of providing affordable health coverage to millions. By managing the flow of information to the executive office, the Chief of Staff ensures alignment between corporate strategy and daily operational execution. This role involves prioritizing critical projects that impact the organization's nationwide managed care footprint. Amy Alberg monitors progress on key performance indicators to keep the leadership team focused on long-term growth and member wellbeing. Through effective project management and stakeholder engagement, the Chief of Staff optimizes internal processes and enhances organizational efficiency. Ultimately, Alberg supports the executive team in navigating the complexities of the healthcare industry while maintaining a sharp focus on the company's commitment to serving underserved populations.

    Ajoy Kodali - Senior Vice President and Chief Information Officer, Markets and Health Products (Medicaid, Marketplace, Medicare and Shared Services)

    Ajoy Kodali, the Senior Vice President and Chief Information Officer, Markets and Health Products (Medicaid, Marketplace, Medicare and Shared Services) at Centene, architects the digital infrastructure supporting the company's diverse health insurance offerings. Kodali directs the implementation of scalable technology solutions that enhance member access to care and streamline administrative processes. By overseeing the integration of data systems across Medicaid, Medicare, and Marketplace plans, the Senior Vice President and Chief Information Officer, Markets and Health Products (Medicaid, Marketplace, Medicare and Shared Services) ensures secure and efficient service delivery. This role involves managing complex IT portfolios to support millions of members nationwide. Ajoy Kodali drives innovation in digital health tools to improve patient outcomes and operational efficiency. Through strategic technology investments, the Senior Vice President and Chief Information Officer, Markets and Health Products (Medicaid, Marketplace, Medicare and Shared Services) enables the organization to maintain its competitive edge in the managed care market.
    Ajoy Kodali

    Arianna Muckerman - Vice President, Chief of Staff (External Affairs)

    Arianna Muckerman, the Vice President, Chief of Staff (External Affairs) at Centene, manages the company's interactions with external stakeholders, including government officials and community partners. Muckerman directs communication strategies that highlight the organization's commitment to improving health outcomes for underserved populations. By overseeing external relations, the Vice President, Chief of Staff (External Affairs) ensures that the company's mission is clearly articulated to the public and policymakers. This role involves coordinating advocacy efforts and building partnerships that support the expansion of integrated care solutions. Arianna Muckerman monitors the political and social landscape to identify opportunities for the company to influence healthcare policy positively. Through effective engagement, the Vice President, Chief of Staff (External Affairs) strengthens the company's reputation as a leader in managed care. Ultimately, Muckerman fosters the relationships necessary to sustain the company's growth and impact across all 50 U.S. states.

    Scott Gaydos - Chief Information Officer, Marketplace & Commercial

    Scott Gaydos, the Chief Information Officer, Marketplace & Commercial at Centene, leads the technology strategy for the company's commercial and Health Insurance Marketplace business lines. Gaydos architects digital platforms that simplify the enrollment process and improve member engagement for these specific products. By overseeing the development of robust IT systems, the Chief Information Officer, Marketplace & Commercial ensures that members receive seamless access to their health benefits. This role involves managing data security and system integration to support the company's large-scale operations. Scott Gaydos drives the adoption of new technologies that enhance the user experience for Marketplace participants. Through strategic IT management, the Chief Information Officer, Marketplace & Commercial supports the company's goal of providing high-quality, affordable coverage to a broad range of individuals. Ultimately, Gaydos enables the organization to maintain its status as a leading carrier on the U.S. Health Insurance Marketplace.

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    Frequently Asked Questions Regarding Centene Top Executives and Leadership Team

    Who leads Centene?
    Centene is led by Sarah London (Chief Executive Officer), along with executives such as Nathan Landsbaum (Chief Executive Officer, Markets & Medicaid) and Adam Ceteznik (Chief Financial Officer, At Coordinated Care).
    Who is part of Centene’s executive team?
    The executive team of Centene includes leaders such as Sarah London (Chief Executive Officer), Nathan Landsbaum (Chief Executive Officer, Markets & Medicaid), Adam Ceteznik (Chief Financial Officer, At Coordinated Care) and other senior executives.
    How many executives does Centene have?
    Centene has 10 executives leading key business areas.
    What roles are included in Centene’s leadership team?
    The leadership team of Centene includes roles such as Chief Executive Officer, Chief Executive Officer, Markets & Medicaid, Chief Financial Officer, At Coordinated Care, Chief Financial Officer, Silver Summit Healthplan, Chief Financial Officer, Health Plan.