Citadel Securities Executive and Leadership Team

November, 2026

Leadership Overview

Citadel Securities has 10 executives leading key functions including strategy, administration, operations, and legal compliance.

Focused on delivering liquidity through advanced analytics and technology, Citadel Securities empowers global financial institutions and government agencies by solving complex market challenges with precision and speed.

Leadership Roles at Citadel Securities

  • Chief Executive Officer - S. Ha
  • Chief Administrative Officer & Chief Executive Officer, Office of - Lindsey Tsukiyama
  • Office of the Chief Executive Officer - Rachel Whelan
  • Vice President, Office of the Chief Executive Officer - Lindsey Parr
  • Global Chief Operating Officer, Credit - Erin Pomerantz
  • Associate - Options Chief Operating Officer - Tyler Gilbert
  • Chief Operating Officer, Rates (US) - Alexander Jang
  • Deputy Chief Operating Officer, Legal & Compliance - Laura Brayton
  • Deputy Chief Operating Officer (APAC) - Sisi Zhang
  • Managing Director - Cory Laing
  • S. Ha - Chief Executive Officer

    S. Ha, the Chief Executive Officer at Citadel Securities, directs the overarching strategic vision and market positioning of the firm. By overseeing the deployment of advanced analytics and proprietary trading technology, the Chief Executive Officer ensures the delivery of critical liquidity to central banks and financial institutions worldwide. This leadership role involves constant collaboration with the Board to maintain a competitive edge in capital markets. S. Ha drives the firm toward solving complex financial problems that others consider impossible, fostering a culture of innovation and technical excellence. Through the management of high-level research initiatives, the Chief Executive Officer secures the firm's status as a next-generation leader in the global finance sector. Ultimately, the Chief Executive Officer maintains the operational integrity required to support sovereign wealth funds and corporations across diverse international markets.

    Lindsey Tsukiyama - Chief Administrative Officer & Chief Executive Officer, Office of

    Lindsey Tsukiyama, the Chief Administrative Officer & Chief Executive Officer, Office of at Citadel Securities, manages the internal infrastructure and administrative frameworks that support the firm's global operations. By coordinating the activities within the Office of the Chief Executive Officer, Tsukiyama ensures seamless alignment between executive strategy and daily business execution. This role involves optimizing organizational processes to facilitate the rapid deployment of trading technology and research. Lindsey Tsukiyama oversees the administrative functions that enable the firm to provide liquidity to government agencies and insurers with maximum efficiency. Through the management of cross-departmental workflows, the Chief Administrative Officer & Chief Executive Officer, Office of maintains the operational stability necessary for sustained growth. Tsukiyama drives the administrative excellence required to support the firm's mission of solving impossible financial challenges.

    Rachel Whelan - Office of the Chief Executive Officer

    Rachel Whelan, the Office of the Chief Executive Officer at Citadel Securities, facilitates the strategic initiatives and operational priorities defined by the firm's leadership. By managing the flow of information and project coordination within the Office of the Chief Executive Officer, Whelan ensures that the firm's advanced trading expertise remains focused on critical market objectives. This role involves bridging the gap between research teams and executive decision-makers to accelerate the delivery of liquidity solutions for financial institutions. Rachel Whelan oversees the integration of complex business requirements into actionable plans that support the firm's market-leading position. Through the coordination of high-stakes projects, the Office of the Chief Executive Officer maintains the organizational agility needed to navigate volatile capital markets. Whelan drives the internal alignment necessary to solve the most challenging problems in the financial industry.

    Lindsey Parr - Vice President, Office of the Chief Executive Officer

    Lindsey Parr, the Vice President, Office of the Chief Executive Officer at Citadel Securities, supports the execution of strategic mandates and operational oversight within the firm's executive branch. By managing key initiatives for the Office of the Chief Executive Officer, Parr ensures that the firm's technological and analytical resources are effectively utilized to serve sovereign wealth funds and insurers. This role involves analyzing market trends to inform executive decision-making and optimizing internal communication channels. Lindsey Parr oversees the implementation of projects that enhance the firm's ability to provide liquidity across global markets. Through the coordination of cross-functional teams, the Vice President, Office of the Chief Executive Officer maintains the operational rigor required for high-frequency trading environments. Parr drives the strategic initiatives that allow the firm to maintain its reputation for solving complex financial problems.

    Erin Pomerantz - Global Chief Operating Officer, Credit

    Erin Pomerantz, the Global Chief Operating Officer, Credit at Citadel Securities, manages the operational infrastructure for the firm's credit trading business. By overseeing the integration of advanced analytics into credit market operations, Pomerantz ensures the firm provides reliable liquidity to financial institutions on a global scale. This role involves optimizing the technology stack to support high-volume trading and risk management. Erin Pomerantz directs the operational teams responsible for maintaining market stability and efficiency across diverse credit instruments. Through the management of global workflows, the Global Chief Operating Officer, Credit ensures that the firm's research-driven approach translates into superior execution for clients. Pomerantz drives the operational excellence required to solve complex credit market challenges, ensuring that the firm remains a leader in providing liquidity to corporations and insurers worldwide.
    Erin Pomerantz

    Tyler Gilbert - Associate - Options Chief Operating Officer

    Tyler Gilbert, the Associate - Options Chief Operating Officer at Citadel Securities, manages the day-to-day operational efficiency of the options trading desk. By overseeing the technical processes that support high-frequency options execution, Gilbert ensures the firm maintains its commitment to providing critical liquidity. This role involves monitoring trade flows and optimizing the underlying technology to handle complex market conditions. Tyler Gilbert directs the operational support teams to ensure seamless integration between research models and live trading environments. Through the management of options-specific workflows, the Associate - Options Chief Operating Officer maintains the firm's ability to solve intricate pricing and liquidity problems. Gilbert drives the operational improvements necessary to support the firm's market-leading position in options, ensuring that the firm's trading expertise is effectively deployed to serve financial institutions and government agencies.

    Alexander Jang - Chief Operating Officer, Rates (US)

    Alexander Jang, the Chief Operating Officer, Rates (US) at Citadel Securities, oversees the operational framework for the firm's rates trading business within the North American market. By managing the technology and research deployment for interest rate products, Jang ensures the firm provides consistent liquidity to central banks and financial institutions. This role involves optimizing the operational infrastructure to handle the complexities of the US rates market. Alexander Jang directs the teams responsible for maintaining high-performance trading systems and risk management protocols. Through the management of regional operations, the Chief Operating Officer, Rates (US) ensures that the firm's advanced analytics are effectively applied to solve market challenges. Jang drives the operational excellence required to support the firm's mission, ensuring that the firm remains a dominant force in the rates trading landscape.
    Laura Brayton, the Deputy Chief Operating Officer, Legal & Compliance at Citadel Securities, manages the regulatory and legal frameworks that govern the firm's global trading activities. By overseeing the compliance infrastructure, Brayton ensures that the firm's advanced technology and trading strategies adhere to international standards. This role involves coordinating with legal teams to mitigate risk while supporting the firm's mission of providing liquidity to financial institutions. Laura Brayton directs the implementation of compliance protocols that allow the firm to operate efficiently in complex regulatory environments. Through the management of legal and compliance operations, the Deputy Chief Operating Officer, Legal & Compliance maintains the firm's reputation for integrity and excellence. Brayton drives the operational safeguards necessary to solve complex regulatory challenges, ensuring that the firm's market-leading position is protected and sustained.

    Sisi Zhang - Deputy Chief Operating Officer (APAC)

    Sisi Zhang, the Deputy Chief Operating Officer (APAC) at Citadel Securities, manages the operational expansion and infrastructure for the firm's activities across the Asia-Pacific region. By overseeing the deployment of trading technology and research in this market, Zhang ensures the firm provides critical liquidity to regional financial institutions and government agencies. This role involves adapting the firm's global operational standards to meet the unique requirements of the APAC market. Sisi Zhang directs the operational teams responsible for maintaining high-performance trading systems in the region. Through the management of regional workflows, the Deputy Chief Operating Officer (APAC) ensures that the firm's advanced analytics are effectively applied to solve local market challenges. Zhang drives the operational excellence required to support the firm's growth in the region, ensuring that the firm remains a leader in providing liquidity to APAC clients.

    Cory Laing - Managing Director

    Cory Laing, the Managing Director at Citadel Securities, leads high-level business development and client engagement strategies to expand the firm's footprint in global capital markets. By overseeing the relationships with major financial institutions and government agencies, Laing ensures the consistent delivery of liquidity solutions. This role involves architecting growth strategies that leverage the firm's advanced research and trading technology. Cory Laing directs the efforts of specialized teams to solve complex market problems, ensuring that the firm remains the partner of choice for insurers and sovereign wealth funds. Through the management of large-scale client portfolios, the Managing Director maintains the firm's competitive advantage in the finance sector. Laing drives the strategic expansion of the firm's market reach, ensuring that the firm's technological capabilities are fully utilized to meet the evolving needs of global financial partners.

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    Frequently Asked Questions Regarding Citadel Securities Top Executives and Leadership Team

    Who leads Citadel Securities?
    Citadel Securities is led by S. Ha (Chief Executive Officer), along with executives such as Lindsey Tsukiyama (Chief Administrative Officer & Chief Executive Officer, Office of) and Rachel Whelan (Office of the Chief Executive Officer).
    Who is part of Citadel Securities’s executive team?
    The executive team of Citadel Securities includes leaders such as S. Ha (Chief Executive Officer), Lindsey Tsukiyama (Chief Administrative Officer & Chief Executive Officer, Office of), Rachel Whelan (Office of the Chief Executive Officer) and other senior executives.
    How many executives does Citadel Securities have?
    Citadel Securities has 10 executives leading key business areas.
    What roles are included in Citadel Securities’s leadership team?
    The leadership team of Citadel Securities includes roles such as Chief Executive Officer, Chief Administrative Officer & Chief Executive Officer, Office of, Office of the Chief Executive Officer, Vice President, Office of the Chief Executive Officer, Global Chief Operating Officer, Credit.