Citadel Executive and Leadership Team

October, 2026

Leadership Overview

Citadel has 10 executives leading key functions including financial oversight, brand strategy, global equities operations, business development, regional management, technical support, asset management, technology infrastructure, data architecture, and credit market analysis.

Committed to providing liquidity to global market participants, Citadel maintains a rigorous focus on precision, technological innovation, and market-making excellence across fixed income, equities, and derivatives.

Leadership Roles at Citadel

  • Chief Financial Officer - Dahan Pham
  • Chief Operating Officer At Global Equities - Rafael Espinosa
  • Global Chief Operating Officer, Business Development & Recruiting - Maggie Boushell
  • Chief Operating Officer (APAC) - Mayank Narang
  • Chief Operating Officer, End User Support - Tiffany Ramadar
  • Chief Operating Officer Ashler Capital - Bob Polachek
  • Chief Operating Officer, Equities Technology - G. Patterson
  • Chief Operating Officer, Data - Kevin Nutter
  • Business Analyst & Chief Operating Officer, Credit & Convertibles - Srikari Ayyagari
  • Chief Marketing Officer - Amanda Rubin
  • Dahan Pham - Chief Financial Officer

    Dahan Pham, the Chief Financial Officer at Citadel, manages the firm's capital structure and financial reporting processes. Overseeing global fiscal health, the Chief Financial Officer ensures compliance with international regulatory standards while optimizing liquidity management for diverse market participants. This role involves close collaboration with the Board to align investment strategies with long-term growth objectives. By monitoring market volatility and capital allocation, Dahan Pham maintains the firm's robust balance sheet. The Chief Financial Officer drives efficiency across all financial operations, ensuring that Citadel remains a premier liquidity provider for banks, asset managers, and government agencies. Through disciplined fiscal oversight, the Chief Financial Officer supports the firm's ability to execute complex trades in fixed income and FX markets, ultimately securing the financial stability required for sustained competitive advantage in the global financial landscape.

    Rafael Espinosa - Chief Operating Officer At Global Equities

    Rafael Espinosa, the Chief Operating Officer At Global Equities at Citadel, manages the operational workflows supporting the firm's equity trading desks. Overseeing the execution of complex equity strategies, the Chief Operating Officer At Global Equities ensures that trading infrastructure remains resilient during periods of high market volume. This role involves optimizing the interface between quantitative research and trade execution to maximize liquidity provision. By streamlining internal processes, Rafael Espinosa enhances the firm's ability to serve broker-dealers and institutional clients effectively. The Chief Operating Officer At Global Equities coordinates with technology teams to integrate advanced algorithmic tools into daily operations. Through rigorous oversight of equity market activities, the Chief Operating Officer At Global Equities maintains the firm's competitive edge, ensuring that all trading operations align with the broader strategic goals of Citadel within the global equities landscape.
    Rafael Espinosa

    Maggie Boushell - Global Chief Operating Officer, Business Development & Recruiting

    Maggie Boushell, the Global Chief Operating Officer, Business Development & Recruiting at Citadel, directs the firm's talent acquisition and strategic growth initiatives. Overseeing the expansion of human capital, the Global Chief Operating Officer, Business Development & Recruiting ensures that the firm attracts top-tier quantitative and financial talent to support market-making operations. This role involves identifying new business opportunities and fostering relationships with potential institutional partners. By aligning recruitment strategies with long-term business development goals, Maggie Boushell strengthens the firm's operational capacity. The Global Chief Operating Officer, Business Development & Recruiting collaborates with department heads to scale teams in response to evolving market demands. Through the implementation of efficient hiring and development frameworks, the Global Chief Operating Officer, Business Development & Recruiting ensures that Citadel maintains the high-performance culture necessary to provide liquidity across fixed income, derivatives, and FX markets globally.

    Mayank Narang - Chief Operating Officer (APAC)

    Mayank Narang, the Chief Operating Officer (APAC) at Citadel, manages the firm's operational footprint across the Asia-Pacific region. Overseeing regional market-making activities, the Chief Operating Officer (APAC) ensures that local operations align with the firm's global standards for liquidity provision and risk management. This role involves navigating complex regulatory environments and optimizing trade execution for regional clients, including banks and asset managers. By coordinating with global leadership, Mayank Narang facilitates the seamless integration of APAC operations into the broader Citadel network. The Chief Operating Officer (APAC) drives regional growth by identifying market opportunities in equities and derivatives. Through the management of local infrastructure and personnel, the Chief Operating Officer (APAC) ensures that the firm remains a dominant liquidity provider in the region, supporting the overall mission of delivering excellence to market participants across diverse financial sectors.

    Tiffany Ramadar - Chief Operating Officer, End User Support

    Tiffany Ramadar, the Chief Operating Officer, End User Support at Citadel, directs the internal technical support infrastructure that powers the firm's daily operations. Overseeing the delivery of high-availability systems, the Chief Operating Officer, End User Support ensures that traders and analysts have the tools required for seamless market-making. This role involves managing the lifecycle of hardware and software solutions that support the firm's global offices. By optimizing support workflows, Tiffany Ramadar minimizes downtime and enhances operational efficiency. The Chief Operating Officer, End User Support collaborates with IT and engineering teams to implement scalable solutions that meet the rigorous demands of the financial industry. Through the management of end-user services, the Chief Operating Officer, End User Support ensures that Citadel maintains the technological reliability necessary to provide liquidity to institutional clients, including hedge funds and government agencies, without interruption.

    Bob Polachek - Chief Operating Officer Ashler Capital

    Bob Polachek, the Chief Operating Officer Ashler Capital at Citadel, manages the operational framework for the firm's specialized investment division. Overseeing the day-to-day activities of Ashler Capital, the Chief Operating Officer Ashler Capital ensures that investment strategies are executed with precision and efficiency. This role involves coordinating with portfolio managers to optimize resource allocation and risk management protocols. By streamlining operational processes, Bob Polachek supports the division's ability to generate consistent returns for institutional clients. The Chief Operating Officer Ashler Capital collaborates with other C-suite leaders to ensure that the division's activities remain aligned with the broader strategic objectives of Citadel. Through rigorous oversight of investment operations, the Chief Operating Officer Ashler Capital maintains the high standards of performance and reliability that define the firm's market-making and asset management services within the competitive financial landscape.

    G. Patterson - Chief Operating Officer, Equities Technology

    G. Patterson, the Chief Operating Officer, Equities Technology at Citadel, directs the development and maintenance of the firm's equity trading technology stack. Overseeing the engineering teams responsible for high-frequency trading platforms, the Chief Operating Officer, Equities Technology ensures that the firm's infrastructure remains at the cutting edge of market-making capabilities. This role involves architecting scalable systems that handle massive data volumes with minimal latency. By optimizing the technology stack, G. Patterson enables the firm to provide superior liquidity to broker-dealers and asset managers. The Chief Operating Officer, Equities Technology collaborates with quantitative researchers to integrate new models into the trading environment. Through the management of equities technology, the Chief Operating Officer, Equities Technology ensures that Citadel maintains its position as a leader in the global equities market, providing the technological foundation for successful trade execution and risk management.
    G. Patterson

    Kevin Nutter - Chief Operating Officer, Data

    Kevin Nutter, the Chief Operating Officer, Data at Citadel, manages the firm's data architecture and analytics strategy. Overseeing the collection, processing, and storage of vast datasets, the Chief Operating Officer, Data ensures that the firm's trading desks have access to high-quality, actionable insights. This role involves implementing advanced data governance frameworks to support the firm's market-making activities in fixed income, derivatives, and FX. By optimizing data pipelines, Kevin Nutter enhances the firm's ability to identify market trends and manage risk effectively. The Chief Operating Officer, Data collaborates with technology and research teams to drive innovation in data-driven decision-making. Through the management of the firm's data assets, the Chief Operating Officer, Data ensures that Citadel maintains a competitive advantage, providing the analytical foundation necessary to serve institutional clients and government agencies with precision and speed.
    Kevin Nutter

    Srikari Ayyagari - Business Analyst & Chief Operating Officer, Credit & Convertibles

    Srikari Ayyagari, the Business Analyst & Chief Operating Officer, Credit & Convertibles at Citadel, directs the operational and analytical functions for the firm's credit and convertible securities desks. Overseeing the integration of market analysis into trading operations, the Business Analyst & Chief Operating Officer, Credit & Convertibles ensures that the firm's credit strategies are supported by robust data and efficient workflows. This role involves analyzing market conditions to optimize liquidity provision for institutional clients. By bridging the gap between business analysis and operational execution, Srikari Ayyagari enhances the firm's performance in the credit markets. The Business Analyst & Chief Operating Officer, Credit & Convertibles collaborates with portfolio managers to refine trading strategies and manage risk. Through the management of credit and convertible operations, the Business Analyst & Chief Operating Officer, Credit & Convertibles ensures that Citadel remains a premier liquidity provider in the global credit landscape.

    Amanda Rubin - Chief Marketing Officer

    Amanda Rubin, the Chief Marketing Officer at Citadel, directs the firm's brand positioning and strategic communications across global markets. Overseeing the firm's reputation among institutional clients, the Chief Marketing Officer ensures that the value proposition of Citadel as a liquidity provider remains clear to asset managers and hedge funds. This leadership role involves crafting narratives that highlight the firm's technological edge in equities and derivatives. By managing external relations and corporate messaging, Amanda Rubin strengthens the firm's market presence. The Chief Marketing Officer coordinates with business units to ensure consistent brand alignment during expansion into new regions. Through targeted outreach and industry engagement, the Chief Marketing Officer fosters trust with broker-dealers and public pension programs, ensuring that the firm's market-making capabilities remain at the forefront of the financial industry's collective consciousness.

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    Frequently Asked Questions Regarding Citadel Top Executives and Leadership Team

    Who leads Citadel?
    Citadel is led by Dahan Pham (Chief Financial Officer), along with executives such as Rafael Espinosa (Chief Operating Officer At Global Equities) and Maggie Boushell (Global Chief Operating Officer, Business Development & Recruiting).
    Who is part of Citadel’s executive team?
    The executive team of Citadel includes leaders such as Dahan Pham (Chief Financial Officer), Rafael Espinosa (Chief Operating Officer At Global Equities), Maggie Boushell (Global Chief Operating Officer, Business Development & Recruiting) 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 Financial Officer, Chief Operating Officer At Global Equities, Global Chief Operating Officer, Business Development & Recruiting, Chief Operating Officer (APAC), Chief Operating Officer, End User Support.