Centene Executive and Leadership Team

October, 2026

Leadership Overview

Centene has 10 executives leading key functions including corporate strategy, information technology, operational management, and market expansion.

Committed to transforming community health, Centene delivers integrated, culturally sensitive healthcare solutions to millions of individuals across the United States while prioritizing affordable access for underserved populations.

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 Operating Officer, Sunshine Health - William Kruegel
  • Executive in Residence & Chief Operating Officer, Ambetter Health Solutions - Marianna Spanos
  • Plan Chief Operating Officer - Curtis Elwood
  • Chief Information Officer - Bradley Bolivar
  • Chief of Staff - Amy Alberg
  • Vice President, Chief of Staff (External Affairs) - Arianna Muckerman
  • Vice President, Chief of Staff - Kellie Vahey
  • Sarah London - Chief Executive Officer

    Sarah London, the Chief Executive Officer at Centene, directs the overarching strategic vision for this national healthcare enterprise. Overseeing the entire organizational structure, the Chief Executive Officer ensures alignment between corporate objectives and the delivery of high-quality, affordable health coverage. This leadership role involves managing complex relationships with state and federal partners to maintain the company's position as a leader in Medicaid and Marketplace plans. By fostering innovation in integrated care, London drives the mission to improve physical, emotional, and social wellbeing for millions of members. The Chief Executive Officer also coordinates with the Board to execute long-term growth initiatives across all 50 states. Through rigorous oversight of operational performance and financial health, Sarah London secures the stability of the organization while expanding access to essential services for low-income populations nationwide.
    Sarah London

    Nathan Landsbaum - Chief Executive Officer, Markets & Medicaid

    Nathan Landsbaum, the Chief Executive Officer, Markets & Medicaid at Centene, oversees the strategic execution of the company's core Medicaid managed care programs. Managing regional market performance, the Chief Executive Officer, Markets & Medicaid ensures that health plans meet the specific needs of low-income populations across various states. This role involves navigating complex regulatory environments and building strong partnerships with state agencies to maintain service quality. By optimizing care delivery models, Landsbaum increases access to integrated health services for millions of members. The Chief Executive Officer, Markets & Medicaid also drives growth by identifying opportunities for expansion within the Health Insurance Marketplace and other commercial products. Through consistent focus on operational excellence and member-centric care, Nathan Landsbaum strengthens the company's footprint as the largest Medicaid managed care organization in the United States.
    Nathan Landsbaum

    Adam Ceteznik - Chief Financial Officer, At Coordinated Care

    Adam Ceteznik, the Chief Financial Officer, At Coordinated Care at Centene, directs the financial strategy and fiscal management for the Coordinated Care division. Overseeing budget planning and financial reporting, the Chief Financial Officer, At Coordinated Care ensures the economic viability of health plan operations. This role involves analyzing cost structures to optimize the delivery of integrated care services while maintaining affordability for members. By implementing rigorous financial controls, Ceteznik supports the long-term sustainability of the division's programs. The Chief Financial Officer, At Coordinated Care also collaborates with operational leaders to allocate resources effectively, ensuring that the organization can meet the healthcare needs of the communities it serves. Through precise financial oversight, Adam Ceteznik contributes to the company's mission of transforming health outcomes by maintaining the fiscal strength necessary to provide high-quality, accessible coverage.

    William Kruegel - Chief Operating Officer, Sunshine Health

    William Kruegel, the Chief Operating Officer, Sunshine Health at Centene, directs the daily operational functions for the Sunshine Health subsidiary. Overseeing regional service delivery, the Chief Operating Officer, Sunshine Health ensures that members receive high-quality, integrated care that addresses physical and social wellbeing. This role involves managing provider networks and streamlining administrative processes to improve the efficiency of health plan operations. By implementing localized strategies, Kruegel enhances the accessibility of healthcare services for diverse populations within the region. The Chief Operating Officer, Sunshine Health also monitors performance metrics to ensure compliance with state requirements and internal quality standards. Through rigorous management of operational resources, William Kruegel supports the broader corporate mission of transforming community health, ensuring that the organization remains a reliable provider of managed care solutions for those who need it most.

    Marianna Spanos - Executive in Residence & Chief Operating Officer, Ambetter Health Solutions

    Marianna Spanos, the Executive in Residence & Chief Operating Officer, Ambetter Health Solutions at Centene, manages the operational framework for the Ambetter product line. Overseeing the expansion of Marketplace plans, the Executive in Residence & Chief Operating Officer, Ambetter Health Solutions ensures that members have access to affordable, high-quality coverage options. This role involves refining the customer experience and optimizing enrollment processes to reach more individuals across the country. By leveraging data-driven insights, Spanos improves the effectiveness of health insurance offerings in competitive markets. The Executive in Residence & Chief Operating Officer, Ambetter Health Solutions also collaborates with cross-functional teams to align product development with the company's overarching mission of community health transformation. Through strategic oversight of Ambetter operations, Marianna Spanos drives growth and ensures the long-term sustainability of these essential health insurance solutions.
    Marianna Spanos

    Curtis Elwood - Plan Chief Operating Officer

    Curtis Elwood, the Plan Chief Operating Officer at Centene, manages the operational execution of specific health plan initiatives. Overseeing the day-to-day delivery of managed care services, the Plan Chief Operating Officer ensures that member needs are met with efficiency and precision. This role involves coordinating with local provider networks to maintain high standards of care and service accessibility. By streamlining internal workflows, Elwood improves the responsiveness of the health plan to the unique requirements of the local population. The Plan Chief Operating Officer also monitors operational performance against key metrics to ensure alignment with corporate quality goals. Through diligent management of plan resources, Curtis Elwood supports the company's commitment to providing integrated, culturally sensitive healthcare, ultimately contributing to the overall success of the organization's mission to improve health outcomes for millions of members.

    Bradley Bolivar - Chief Information Officer

    Bradley Bolivar, the Chief Information Officer at Centene, architects the digital infrastructure necessary to support large-scale managed care operations. Managing the enterprise-wide technology stack, the Chief Information Officer ensures secure, efficient data processing for millions of health plan members. This role involves implementing advanced analytics to track health outcomes and optimize service delivery across diverse regional markets. By modernizing legacy systems, Bolivar enhances the interoperability of healthcare data, allowing for more seamless coordination between providers and patients. The Chief Information Officer also protects sensitive member information through robust cybersecurity protocols, maintaining compliance with national healthcare regulations. Through the deployment of scalable cloud solutions, Bradley Bolivar supports the company's ability to provide integrated care solutions, ultimately driving technological efficiency that directly impacts the quality of coverage provided to underserved communities throughout the United States.
    Bradley Bolivar

    Amy Alberg - Chief of Staff

    Amy Alberg, the Chief of Staff at Centene, manages the executive office operations and facilitates strategic communication across the leadership team. Coordinating high-priority initiatives, the Chief of Staff ensures that organizational goals remain synchronized with the company's mission of expanding healthcare access. This role involves synthesizing complex information from various departments to support informed decision-making by senior leadership. By streamlining internal processes, Alberg improves the agility of the executive team in responding to shifting market demands within the Medicaid and Medicare sectors. The Chief of Staff also monitors the progress of key corporate projects, ensuring accountability and timely execution of strategic objectives. Through effective management of executive workflows, Amy Alberg enables the leadership team to focus on long-term growth and the delivery of high-quality, culturally sensitive care to millions of members across the country.

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

    Arianna Muckerman, the Vice President, Chief of Staff (External Affairs) at Centene, manages the strategic communication and external relations for the organization. Overseeing interactions with key stakeholders, the Vice President, Chief of Staff (External Affairs) ensures that the company's mission and values are effectively represented to the public and policy makers. This role involves coordinating advocacy efforts to support the expansion of affordable healthcare access. By fostering strong relationships with community partners, Muckerman enhances the company's reputation as a leader in managed care. The Vice President, Chief of Staff (External Affairs) also monitors the political and social landscape to provide actionable insights to the executive team. Through effective management of external affairs, Arianna Muckerman supports the company's goal of transforming community health by building broad-based support for integrated care solutions.

    Kellie Vahey - Vice President, Chief of Staff

    Kellie Vahey, the Vice President, Chief of Staff at Centene, facilitates the operational efficiency of the executive leadership team. Managing the flow of information and strategic priorities, the Vice President, Chief of Staff ensures that organizational objectives are met with consistency and focus. This role involves overseeing special projects that cross departmental lines, requiring deep collaboration with various business units. By streamlining executive decision-making processes, Vahey enables the leadership team to respond effectively to the evolving needs of the healthcare market. The Vice President, Chief of Staff also monitors the progress of key initiatives to ensure alignment with the company's mission of providing high-quality, affordable care. Through meticulous management of executive operations, Kellie Vahey supports the overall success of the organization in serving millions of members across the United States.

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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 Operating Officer, Sunshine Health, Executive in Residence & Chief Operating Officer, Ambetter Health Solutions.