• Lead the team responsible for designing, developing, and managing the global surveillance function for Citadel LLC and Citadel Securities.• Created the vision of the firm’s surveillance program, including the control infrastructure, scope of coverage, system implementation, and review methodologies.• Implemented and scaled the surveillance function globally to ensure that all trading and anti-money laundering risks are covered by a control or surveillance that is tailored to the specific regulatory requirements of each product and country.• Oversee the team of analysts responsible for reviewing both first line supervisory reports and second line surveillance alerts.• Manage the development team responsible for building first line supervisory controls and work directly with the front office trading desk, sales, and quant researchers to ensure that regulatory and compliance risks are appropriately addressed.• Proactively engage with regulators all over the world, including but not limited to FINRA, SEC, FCA, IIROC, CBI, SFC, SEBI, CVM, Shenzhen Stock Exchange and the Shanghai Stock exchange, and present Citadel’s control framework and monitoring capabilities to establish a dialogue and strengthen relationships with each regulator.• Designed and implemented a proprietary surveillance system that incorporates hundreds of models to detect misconduct and non-compliant trading activity across equities, futures, options, swaps, treasuries, and forex on more than 150 trading venues globally. • Developed an alert review infrastructure and market intelligence reporting framework, which increased the accuracy and efficacy of analysis and provided transparency to stakeholders. • Created a governance and risk assessment framework that maps all trading activities to associated conduct and compliance risks and the respective controls and monitoring implemented to address each risk.

• Direct the activities of three teams of managers and analysts responsible for conducting investigations of broker/dealers and individuals for compliance with FINRA rules, Exchange rules and Federal securities laws.• Managed more than 500 investigations of various types of fraudulent and manipulative activity including pump and dump schemes, money laundering, tax evasion, Ponzi schemes, misappropriation, wash trading, layering, marking, and insider trading that resulted in formal actions brought by FINRA as well as referrals to the Securities and Exchange Commission and other Federal Agencies.• Designed more than 20 different surveillance patterns utilized by the Market Regulation Department to detect problematic trading activity executed across Exchanges and Alternative Trading Systems.• Serve as one of FINRA’s experts regarding Fraud, Manipulation, High Frequency Trading, and Alternative Trading Systems responding to a broad range of staff inquiries arising in investigations, examinations, and litigation and providing critical guidance to staff when complex issues are identified. • Developed the Market Regulation Department’s framework for investigating firm’s anti-money laundering programs.• Selected to work onsite with the Financial Service Authority (FSA) in London and provided them with guidance regarding the development and enhancement of their regulatory program. • Conducted due diligence of the surveillance and analytic tools offered by the leading provider of surveillance and compliance solutions to the industry and made recommendations to Senior Management regarding their potential application and effectiveness within FINRA.• Regularly communicate with Chief Regulatory Officers of client Exchanges/SROs to ensure that each client receives excellent service and to provide them with updates regarding investigation status and surveillance development.

• Managed approximately 200 reviews per year of FINRA registered firms’ compliance with FINRA rules and Federal securities laws ensuring qualitative and quantitative completion of reviews pursuant to FINRA policies, procedures, and goals. • Recommended the appropriate disciplinary actions resulting from investigative findings.• Supervised the development and mentoring of investigators and managers at varying levels of expertise; preparing, executing and monitoring staff training and development plans; assessing performance of staff; preparing and delivering performance evaluations; and participating in recruiting, interviewing, retaining and recommending pay actions for staff.• Assessed firms’ Trading and AML compliance programs and internal control programs to identify weakness, associated risks and determined compliance with regulations.• Reviewed SEC rule changes and market structure changes, and provided impact assessments to Senior Management regarding the department’s regulatory programs.• Reviewed all Alternative Trading System filings to determine compliance with established rules and regulations and evaluated all risks associated with each trading model.

• Developed strategy and approach for numerous investigations related to fraudulent and manipulative trading activities that resulted in formal action or referrals to the Securities and Exchange Commission. • Managed analysts in the execution of the Market Regulation Departments regulatory program including the investigation of member firms' financial, sales, trading, underwriting, supervisory and organizational practices and systems to determine compliance with federal and FINRA rules and regulations. • Effectively took on-the-record testimony of more than 100 individuals including company executives, traders, operational staff and compliance staff.• Designed and administered training to clients and regulators including employees of the SEC and CFTC regarding the development of market surveillance patterns.• Collaborated with the FBI, SEC, and the New York Stock Exchange on multiple investigations involving stolen trade secrets, pump and dump schemes, and tax evasion. • Developed and administered training to the market regulation staff regarding Dark Pools.

• Supervised investigations to ensure that all relevant issues were addressed, documented, and communicated to senior levels of management.• Served as the Market Regulation Department’s trading systems expert and represented the department to internal and external clients, including SEC. • Received the President’s award for analysis of the effectiveness of surveillance programs that identified deficiencies in multiple Market Regulation surveillance programs.

• Conducted investigations of fraudulent and manipulative trading by gathering and analyzing evidence, evaluating findings, and formulating conclusions to determine compliance with NASD and SEC Rules.• Received the President’s Award for the management of a high profile time sensitive case completed within 3 months, affecting an SEC rule change for distribution of market data revenue.• Examined member firms’ written supervisory procedures, books and records to determine compliance with NASD rules and Federal securities laws.