About Citadel Securities


Our Commitment

Making Better Markets for a Better World

Citadel Securities is an award-winning global market maker across a broad array of fixed income and equity products. Our unique set of capabilities and tools are designed to drive down the cost of transactions, helping to meet the liquidity needs of asset managers, banks, broker-dealers, hedge funds, government agencies, and public pension programs. We strive to provide the most efficient execution and the highest caliber of services, making markets more fair and accessible for all.

Our Team


Peng Zhao

Peng Zhao


Peng oversees all market making activities, including trading, sales, research and technology. He previously served as Head of Global Market Making, where he oversaw Citadel Securities’ global strategies across all touch points to the market: direct on-venue market making, retail brokerage flow, and institutional client flow. Peng began his career with Citadel Securities in 2006 as a Senior Quantitative Researcher.

Prior to joining the Citadel Securities, he worked for Lehman Brothers and served as a Quantitative Researcher for Evnine & Associates.

Peng received a bachelor’s degree in applied mathematics from Peking University, and subsequently attended the University of California at Berkeley as a Berkeley Fellow and graduated with a doctorate in statistics.

Paul Hamill

Paul Hamill

Global Head of FICC

Paul is responsible for the client-facing fixed income market making businesses, including interest rate swaps, government and corporate bonds and credit default swaps.

He was previously a Managing Director and Global Head of FX, Rates and Credit Execution services at UBS, with responsibility for global futures execution, FXPB, and building the fixed income agency business which included the PIN (Price Improvement Network) corporate bond and CDS trading platform, and the Neo platform for SEF traded swaps.

Paul has over 15 years of experience in financial services and has worked in London, Zurich, New York, and Chicago, with experience across e-commerce, trading, and sales. Paul has a Master of Arts in political science from the University of Glasgow and a Master of Science in finance from the University of London.

Joseph Mecane

Joseph Mecane

Head of Execution Services

Joseph Mecane is Head of Execution Services at Citadel Securities. In this role, he is responsible for the client-facing equity, options and ETF businesses.

Prior to joining Citadel Securities, Mr. Mecane was Global Head of Electronic Equities at Barclays. Previously, he worked for the New York Stock Exchange (NYSE) for six years, most recently serving as the Head of U.S. Equities. His earlier career included roles at UBS Securities, Schwab Capital Markets, Knight Capital Group and Price Waterhouse.

Mr. Mecane received an MBA, with honors, from the Wharton School of the University of Pennsylvania and a bachelor’s degree from Pace University.

Remco Lenterman

Remco Lenterman

Head of Global Business Development

Remco is responsible for driving global growth and expansion of our business across markets and into new, diverse product lines.

Prior to joining Citadel Securities, he served as Managing Director at IMC Financial Markets and was responsible for Global Corporate Development and Market Structure. Previously, he spent 16 years at Goldman Sachs as Managing Director responsible for Pan European Equity trading. He also served as Head of Securities for five years at Kempen & Co.

Remco is the Chairman of the FIA European Principal Traders Association. He is also currently a member of the ESMA Consultative Working Group Secondary Markets Standing Committee and was formerly a member of the CFTC Global Markets Advisory Committee.

Remco received a Diploma of European Business Administration from the European Business School in London.

Bin Mu

Bin Mu

Chief Technology Officer

Bin oversees the low latency strategies and research infrastructure efforts of Citadel Securities. He previously served as Head of Information Technology, Global Options Market Making and Quantitative Strategies where he oversaw the development of quantitative trading systems. Prior to joining Citadel Securities, he served as a Business System Analyst at First National Bank. He began his career as a software developer for Reuters Financial Software. Bin received a bachelor’s degree from the University of Science and Technology of China and a master’s degree from the University of Chicago.

Nawaf Bitar

Nawaf Bitar

Chief Information Officer

Nawaf leads all technology-related initiatives for Citadel Securities. He is also a member of the Board of Directors of Plum, Inc and Pulse Secure, LLC, and is a Venture Partner at Allegis Capital. Before joining Citadel Securities he was Senior Vice President and General Manager of the Cloud Platform Business Unit at VMware.

Prior to joining VMware, Nawaf served as Senior Vice President and General Manager of the Security Business Unit at Juniper Networks. Prior to Juniper, he served as Vice President of Engineering and Operations of Security Technology at Cisco Systems, having joined that company in 2007 through the acquisition of IronPort Systems, where he was Senior Vice President of Engineering. Before IronPort, he served as Vice President of File Systems and Services at Network Appliance, and previously held roles at Silicon Graphics, Apollo Computer and other firms. Nawaf graduated from The University of Texas at Austin with a Bachelor of Arts.

Scott Johnston

Scott Johnston

Chief Operating Officer

Scott is the Chief Operating Officer of Citadel Securities, a leading global market maker across a broad array of equity and fixed income securities. He is responsible for leading the day-to-day liaison between sales, trading and operations as well as driving execution for operational and technology initiatives.

Scott joined Citadel Securities in 2017 from Tower Research Capital, where he was a partner and COO responsible for business development, operations and business management. Prior to joining Tower, he was Managing Director and Chief Information Officer at the Chicago Mercantile Exchange (CME), responsible for GLOBEX and clearing technology. During his time at the CME, Scott was a member of the management team that led the exchange through demutualization and an IPO in 2002.

Earlier in his career, Scott worked at UBS as Managing Director in Foreign Exchange and Interest Rates and later as Global Head of Treasury Products Technology. He was also a software developer, options trader and business manager with O’Connor and Associates, and started his career in financial services as a senior programmer with Townsend Analytics.

Scott is a graduate of the University of Michigan.

Our Track Record


Launches electronic options market making business, becoming industry leader in 18 months


Launches options customer routing and equity market making businesses


Achieves 15% market share in equities1. Achieves first 1M contract option day


First one-billion share day in equity trading


Begins delivery of algorithms to external clients


Launches OTC and IMM market making business


Launches Interest Rate Swap market making. Citadel Connect reaches 79m shares ADV2.


Launches US Treasuries market making.

Recognized as “Interest Rate Derivatives House of the Year” by Risk Magazine and IFR Magazine. Wins “Best Electronic Liquidity Provider” at the Markets Choice Awards. Named one of the country’s 30 best workplaces in financial services and insurance by Great Place to Work.


Becomes #1 Designated Market Maker on the NYSE

Becomes #1 Designated Market Maker on the NYSE3. Launches CDX market making. Wins “Rates and Equities Flow Market Maker of the Year” from Risk Magazine. 2016 also saw trading surges at critical historical moments, with Citadel Securities managing more than a 3x volume increase following the US election and over 4x during Brexit. Firm named one of the country’s 50 best workplaces for recent college graduates by Great Place to Work. Firm recognized as Best Flow House for Equities and Interest Rates by Risk Magazine.

Global Locations


Global Headquarters
131 South Dearborn Street
Chicago, IL 60603 USA

TEL 312-395-2100
FAX 312-267-7100

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New York

350 Park Avenue
(Between 51st and 52nd Street)
New York, NY 10022 USA

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120 London Wall
London EC2Y 5ET
United Kingdom


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Hong Kong

Chater House Suites 1801, 1806-10
8 Connaught Road
Central, Hong Kong

TEL 852.3667.5500
FAX 852.3667.5501

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First Canadian Place
100 King Street West
Suite 4720
PO Box 147
Toronto, Ontario
M5X 1C7

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15/F Plaza 66, Tower II
Nanjing West Road
Shanghai, China

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2 Park Street
Sydney NSW 2000

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One Grand Canal Square
5th Floor
Dublin 2
Dublin, Ireland

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