Citadel Executive and Leadership Team

May, 2026

Leadership Overview

Citadel has 10 executives leading key functions including administration, technology, operations, and legal.

Driven by a commitment to innovation, Citadel integrates integrity across its IT services, employing a collaborative approach to strategy and providing 24/7 support with a unique organizational roadmap.

Leadership Roles at Citadel

  • Chief Administrative Officer & Chief Executive Officer, Office of - Fallon Sullivan
  • Chief Operating Officer, Corporate Affairs - Sarina Huang
  • Senior Deputy General Counsel & Chief Operating Officer, Legal & Compliance - Antonia Peabody
  • Chief Operating Officer Ashler Capital - Bob Polachek
  • Completion Chief Operating Officer, Fixed Income and Macro - Chace Gordon
  • Global Chief Operating Officer, Office of The, Equity Quantitative Research & Trading - Dana Gordon
  • Global Chief Operating Officer, Post Trade Engineering Operations, Transaction Services, Position Services - Rushi Amin
  • Global Chief Operating Officer, Treasury, Team - Christopher Dawson
  • Chief Technology Officer - Stephen Youtzy
  • Manager, Business & Chief Information Officer, Office of - Samantha Shapiro
  • Fallon Sullivan - Chief Administrative Officer & Chief Executive Officer, Office of

    Fallon Sullivan, the Chief Administrative Officer & Chief Executive Officer, Office of at Citadel, directs the overarching administrative functions and executive office operations. This leadership position involves ensuring seamless integration between strategic initiatives and daily operational execution, aligning departmental efforts with the company's core mission. Sullivan oversees the administrative infrastructure that supports Citadel's comprehensive IT strategy and its commitment to 24/7 stellar support. The role demands meticulous attention to detail in managing resources and optimizing workflows to maintain the unique organizational roadmap. By fostering an environment of efficiency and integrity, Fallon Sullivan ensures that administrative processes directly contribute to the company's ability to cover the entire spectrum of IT services effectively. This executive's focus is on the foundational elements that enable Citadel's innovative and integrity-driven service delivery.

    Sarina Huang - Chief Operating Officer, Corporate Affairs

    Sarina Huang, the Chief Operating Officer, Corporate Affairs at Citadel, manages the operational execution of corporate initiatives and stakeholder relations. Huang ensures that Citadel's internal operations align with its external commitments, fostering a cohesive and integrated service delivery model. This executive oversees the processes that support the company's collaborative approach to IT strategy and its dedication to 24/7 stellar support. Sarina Huang's role is pivotal in maintaining the integrity of Citadel's operations and upholding its unique organizational roadmap. By optimizing corporate functions, Huang enhances the company's ability to cover the entire spectrum of IT services efficiently. The Chief Operating Officer, Corporate Affairs drives operational excellence, ensuring that all corporate activities support Citadel's mission of innovation and integrity in the tech consulting space.
    Antonia Peabody, the Senior Deputy General Counsel & Chief Operating Officer, Legal & Compliance at Citadel, directs the legal framework and compliance operations. Peabody ensures that all Citadel activities adhere to regulatory standards and ethical guidelines, reinforcing the company's commitment to integrity. This leadership role is crucial in safeguarding the organization while supporting its comprehensive IT strategy and 24/7 stellar support. Antonia Peabody oversees the operational aspects of legal and compliance functions, ensuring they align with Citadel's unique organizational roadmap. By managing risk and ensuring adherence to law, Peabody strengthens the company's foundation, enabling it to cover the entire spectrum of IT services with confidence and trustworthiness. The Chief Operating Officer, Legal & Compliance role is integral to maintaining Citadel's reputation and operational stability.
    Antonia Peabody

    Bob Polachek - Chief Operating Officer Ashler Capital

    Bob Polachek, the Chief Operating Officer Ashler Capital at Citadel, spearheads operational efficiency and strategic execution within the Ashler Capital division. Polachek ensures that the operational framework supports Citadel's broader IT strategy and its commitment to 24/7 stellar support, tailored to the specific needs of Ashler Capital. This executive's focus is on optimizing processes and resource allocation to align with the company's unique organizational roadmap. Bob Polachek drives operational excellence, ensuring that the division contributes effectively to Citadel's mission of providing a comprehensive spectrum of IT services with integrity. The Chief Operating Officer role involves close collaboration with other leaders to achieve synergistic growth and maintain high standards of service delivery. Polachek's leadership ensures robust operational performance.

    Chace Gordon - Completion Chief Operating Officer, Fixed Income and Macro

    Chace Gordon, the Completion Chief Operating Officer, Fixed Income and Macro at Citadel, oversees the operational completion of strategies within the Fixed Income and Macro divisions. Gordon ensures that operational processes are optimized for efficiency and effectiveness, supporting Citadel's comprehensive IT strategy and its 24/7 stellar support commitment. This executive's responsibilities include driving the execution of complex financial operations, aligning them with the company's unique organizational roadmap. Chace Gordon focuses on delivering seamless operational outcomes, enabling Citadel to cover the entire spectrum of IT services with precision and integrity. The Chief Operating Officer role in these specialized areas demands a deep understanding of market dynamics and operational execution to achieve strategic objectives and maintain high performance standards.

    Dana Gordon - Global Chief Operating Officer, Office of The, Equity Quantitative Research & Trading

    Dana Gordon, the Global Chief Operating Officer, Office of The, Equity Quantitative Research & Trading at Citadel, directs global operational strategies for equity quantitative research and trading. Gordon ensures that operational frameworks support Citadel's advanced IT strategy and its 24/7 stellar support, particularly within the high-paced trading environment. This executive's purview includes optimizing the complex workflows of quantitative research and trading operations, aligning them with the company's unique organizational roadmap. Dana Gordon drives operational excellence, enabling Citadel to deliver the full spectrum of IT services with unparalleled speed and accuracy. The Global Chief Operating Officer role is critical in managing the intricate operational demands of global markets, ensuring integrity and efficiency in all transactions and research endeavors.

    Rushi Amin - Global Chief Operating Officer, Post Trade Engineering Operations, Transaction Services, Position Services

    Rushi Amin, the Global Chief Operating Officer, Post Trade Engineering Operations, Transaction Services, Position Services at Citadel, leads the operational execution of critical post-trade processes and engineering. Amin ensures that these complex operations align with Citadel's robust IT strategy and its 24/7 stellar support, maintaining the integrity of transaction and position services. This executive's responsibilities encompass optimizing engineering operations and transaction flows, adhering to the company's unique organizational roadmap. Rushi Amin drives efficiency and reliability in post-trade services, enabling Citadel to cover the entire spectrum of IT services with precision. The Global Chief Operating Officer role is vital for ensuring seamless execution, risk mitigation, and operational excellence in global financial services.

    Christopher Dawson - Global Chief Operating Officer, Treasury, Team

    Christopher Dawson, the Global Chief Operating Officer, Treasury, Team at Citadel, oversees the operational management of global treasury functions. Dawson ensures that treasury operations are integrated with Citadel's comprehensive IT strategy and its 24/7 stellar support, maintaining the highest standards of financial integrity. This executive's focus is on optimizing treasury processes and team performance, aligning them with the company's unique organizational roadmap. Christopher Dawson drives operational excellence within the treasury department, enabling Citadel to manage its financial resources effectively and cover the entire spectrum of IT services with financial acumen. The Global Chief Operating Officer role is essential for robust financial management and strategic resource allocation across the organization.

    Stephen Youtzy - Chief Technology Officer

    Stephen Youtzy, the Chief Technology Officer at Citadel, architects the technological vision and innovation pipeline. Youtzy drives the integration of cutting-edge technologies across Citadel's IT services, ensuring that the company remains at the forefront of its industry. This role is critical in translating the company's collaborative, comprehensive approach to IT strategy into tangible technological solutions. Stephen Youtzy oversees the development and implementation of systems that support 24/7 stellar support and the unique organizational roadmap. The Chief Technology Officer's responsibilities include managing the technology infrastructure, fostering a culture of continuous improvement, and ensuring that all technological endeavors align with Citadel's commitment to integrity. By leading technological advancements, Youtzy empowers Citadel to deliver the full spectrum of IT services with unparalleled efficiency and innovation.

    Samantha Shapiro - Manager, Business & Chief Information Officer, Office of

    Samantha Shapiro, the Manager, Business & Chief Information Officer, Office of at Citadel, leads the strategic direction of information systems and business operations. Shapiro ensures that Citadel's technology infrastructure effectively supports its comprehensive IT strategy and its commitment to 24/7 stellar support. This executive's purview includes optimizing business processes through innovative information management, directly contributing to the company's unique organizational roadmap. Samantha Shapiro oversees the alignment of IT resources with business objectives, driving efficiency and integrity across all departments. By managing the flow of information and technology, Shapiro enables Citadel to deliver the entire spectrum of IT services with enhanced performance and reliability. The Chief Information Officer's focus is on leveraging technology to achieve business goals and maintain operational excellence.

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    Frequently Asked Questions Regarding Citadel Top Executives and Leadership Team

    Who leads Citadel?
    Citadel is led by Fallon Sullivan (Chief Administrative Officer & Chief Executive Officer, Office of), along with executives such as Sarina Huang (Chief Operating Officer, Corporate Affairs) and Antonia Peabody (Senior Deputy General Counsel & Chief Operating Officer, Legal & Compliance).
    Who is part of Citadel’s executive team?
    The executive team of Citadel includes leaders such as Fallon Sullivan (Chief Administrative Officer & Chief Executive Officer, Office of), Sarina Huang (Chief Operating Officer, Corporate Affairs), Antonia Peabody (Senior Deputy General Counsel & Chief Operating Officer, Legal & Compliance) and other senior executives.
    How many executives does Citadel have?
    Citadel has 10 executives leading key business areas.
    What roles are included in Citadel’s leadership team?
    The leadership team of Citadel includes roles such as Chief Administrative Officer & Chief Executive Officer, Office of, Chief Operating Officer, Corporate Affairs, Senior Deputy General Counsel & Chief Operating Officer, Legal & Compliance, Chief Operating Officer Ashler Capital, Completion Chief Operating Officer, Fixed Income and Macro.