Two Sigma Executive and Leadership Team

Carter Lyons, the Co-Chief Executive Officer at Two Sigma, directs the overarching strategic vision and long-term growth initiatives for the firm. By integrating advanced machine learning with traditional financial analysis, Lyons ensures the company maintains a competitive edge in global markets. The Co-Chief Executive Officer oversees the alignment of research-driven investment strategies with institutional client objectives. Carter Lyons fosters a culture of rigorous scientific inquiry, ensuring that every investment decision relies on robust data sets and proprietary algorithms. This leadership role involves constant collaboration with the board to refine risk management frameworks and expand the firm's footprint across international financial centers. Through the application of cutting-edge technology, Lyons drives operational excellence and secures the firm's position as a leader in the quantitative investment sector, ultimately delivering superior performance outcomes for diverse portfolios.

Dawn Schoppner, the Chief Financial Officer at Two Sigma, directs the firm's global financial planning, accounting, and capital management functions. Schoppner architects the financial reporting processes that provide transparency to stakeholders and ensure regulatory compliance across all jurisdictions. The Chief Financial Officer oversees the firm's treasury operations, managing liquidity and capital allocation to support ongoing investment activities. Dawn Schoppner collaborates with the executive team to evaluate the financial impact of new business initiatives and market expansions. This leadership role involves monitoring the firm's fiscal health and implementing strategies to optimize cost structures and operational efficiency. By maintaining rigorous financial controls and accurate reporting, Schoppner ensures that the firm remains well-positioned to navigate complex economic environments. Through strategic financial oversight, Schoppner supports the firm's mission of delivering consistent value through data-driven investment management.

Tim Reynolds, the Managing Director, Chief Operating Officer at Two Sigma, directs the firm's day-to-day operational activities and infrastructure management. Reynolds architects the processes that ensure seamless execution across all investment and research functions. The Managing Director, Chief Operating Officer oversees the firm's global operational footprint, ensuring that offices and systems remain synchronized to support continuous trading activities. Tim Reynolds collaborates with other C-suite leaders to implement strategic initiatives that enhance operational efficiency and reduce systemic risk. This leadership role involves managing the firm's internal resources and ensuring that all departments have the necessary support to achieve their objectives. By focusing on operational excellence and scalability, Reynolds ensures that the firm can effectively manage large-scale data processing and complex investment strategies. Through diligent management and strategic planning, Reynolds supports the firm's mission of applying technology to solve the most challenging problems in the finance world.

Alysha Sadarangani, the Analyst, Chief Information Officer Chief of Staff and Talent Programs Team at Two Sigma, coordinates the operational priorities and strategic initiatives within the technology division. Sadarangani architects communication workflows that align the Chief Information Officer's vision with the broader engineering and research teams. The Analyst, Chief Information Officer Chief of Staff and Talent Programs Team manages the execution of talent programs designed to cultivate technical expertise and leadership potential within the firm. Alysha Sadarangani facilitates cross-departmental collaboration to ensure that technological resources are effectively deployed to support investment objectives. This role involves analyzing operational data to identify areas for process improvement and efficiency gains. By managing the flow of information and resources, Sadarangani ensures that the technology division remains agile and responsive to the firm's evolving needs. Through these efforts, Sadarangani supports the firm's commitment to technological excellence.

Zian Sun, the Senior Vice President, Head of Product and Engineering (Chief Technology Officer and Fractional Chief People Officer) at Two Sigma, directs the development of the firm's proprietary product suite and engineering standards. Sun architects the technical roadmap that integrates advanced data analytics into the firm's investment management tools. The Senior Vice President, Head of Product and Engineering (Chief Technology Officer and Fractional Chief People Officer) oversees the engineering teams responsible for building scalable software solutions that drive the firm's competitive advantage. Zian Sun also manages human capital initiatives within the technology division, ensuring that the workforce remains aligned with the firm's innovative culture. This role involves balancing product development cycles with the need for robust system security and performance. By bridging the gap between technical innovation and organizational needs, Sun ensures that the firm's products remain at the cutting edge of the finance industry.

Mark Ardalan, the Managing Director at Two Sigma, leads the development of specialized quantitative trading strategies within the firm's core investment division. Ardalan architects complex algorithmic models that identify market inefficiencies across global asset classes. The Managing Director coordinates with research teams to refine predictive signals, ensuring that data-driven insights translate into actionable investment opportunities. Mark Ardalan manages the deployment of capital across diverse portfolios, focusing on risk-adjusted returns and long-term stability. This role requires deep engagement with the firm's proprietary technology stack to optimize execution speed and accuracy. By overseeing the integration of new data sources into existing models, Ardalan enhances the firm's ability to navigate volatile market conditions. Through consistent focus on quantitative rigor, Ardalan supports the broader mission of applying scientific methodology to solve intricate financial challenges for institutional investors.

Dion Harmon, the Managing Director at Two Sigma, oversees the expansion of institutional client relationships and strategic partnerships across North American markets. Harmon directs the alignment of investment products with the specific risk profiles and return requirements of large-scale investors. The Managing Director manages the communication of complex quantitative strategies to stakeholders, ensuring transparency and clarity regarding the firm's data-centric approach. Dion Harmon collaborates with internal research teams to tailor investment solutions that address evolving market dynamics. This leadership role involves monitoring regional economic trends to identify new growth opportunities for the firm's diverse fund offerings. By maintaining high standards of client service and operational integrity, Harmon strengthens the firm's market presence. Through the continuous refinement of engagement strategies, Harmon ensures that institutional clients receive consistent value and support from the firm's sophisticated investment platform.

Mae Santos, the Managing Director at Two Sigma, manages the firm's internal risk assessment frameworks and compliance protocols to ensure robust operational stability. Santos architects comprehensive monitoring systems that evaluate market exposure and liquidity risks across all investment vehicles. The Managing Director coordinates with legal and regulatory teams to maintain adherence to global financial standards while supporting the firm's innovative trading activities. Mae Santos oversees the implementation of internal controls that protect the firm's proprietary data and intellectual property. This leadership role involves analyzing systemic vulnerabilities and developing mitigation strategies to safeguard assets during periods of market stress. By integrating risk management into the core investment process, Santos ensures that the firm's quantitative models operate within defined parameters. Through diligent oversight and strategic planning, Santos supports the firm's commitment to excellence and long-term financial security.

Vitaly Davidovich, the Managing Director at Two Sigma, directs the development of high-frequency trading infrastructure and low-latency execution systems. Davidovich architects scalable technological solutions that allow the firm to process vast amounts of market data in real-time. The Managing Director oversees the engineering teams responsible for maintaining the stability and performance of the firm's core trading platforms. Vitaly Davidovich collaborates with quantitative researchers to ensure that the underlying technology supports the rapid deployment of new investment strategies. This role involves managing the firm's global server architecture and network connectivity to optimize execution efficiency across international exchanges. By focusing on technical innovation and system reliability, Davidovich ensures that the firm remains at the forefront of the data-rich finance world. Through the continuous improvement of computational capabilities, Davidovich drives the firm's ability to capture fleeting market opportunities.

Sumi Choi, the Managing Director at Two Sigma, leads the firm's talent acquisition and human capital development initiatives to attract top-tier quantitative researchers and engineers. Choi architects programs that foster a culture of innovation and collaborative problem-solving across all departments. The Managing Director oversees the alignment of organizational structure with the firm's long-term strategic goals, ensuring that teams possess the necessary expertise to execute complex investment mandates. Sumi Choi manages the professional development and retention strategies that keep the firm competitive in the global market for specialized technical talent. This leadership role involves working with department heads to identify skill gaps and implement training initiatives that enhance the firm's collective intelligence. By prioritizing the recruitment of diverse and highly skilled professionals, Choi ensures that the firm maintains its edge in applying technology to finance. Through these efforts, Choi supports the firm's ongoing growth and operational success.