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Washington, D.C. Partners and Counsel

David W. Blass - Partner - Headshot
David W. Blass - Partner

Based in our Washington, D.C. office, David Blass is a Partner in the Firm’s Investment Funds Practice. David is a leading regulatory lawyer in the funds industry and has advised on matters involving innovative registered funds products, Investment Advisers Act compliance, SEC examination and enforcement matters, and broker-dealer regulatory compliance.  He is uniquely qualified to provide strategic and regulatory advice on matters involving asset management  firms and broker-dealers. 

David has extensive knowledge of the regulatory requirements of the asset management industry having  served as General Counsel of the Investment Company Institute, the trade association for registered investment funds.  He also held senior roles for over a decade at the U.S. Securities and Exchange Commission, most recently as Chief Counsel and Associate Director in the Division of Trading and Markets, where he oversaw broker-dealer regulation and large aspects of FINRA’s regulatory program.  David was the Associate General Counsel for the SEC where he was responsible for Dodd-Frank Act implementation, among many other programmatic areas.  He also held a senior role in the SEC’s Division of Investment Management, leading the office regulating registered investment advisers, including advisers to private funds.

Chambers Global
reports that clients say he is an “excellent regulatory lawyer” who is both “very knowledgeable and easy to work with.” David was notably named “Independent Counsel of the Year” by Fund Intelligence’s Mutual Fund Industry & ETF Awards in 2021.

Joshua Ford Bonnie - Partner - Headshot
Joshua Ford Bonnie - Partner Co-Head of the Firm’s Global Capital Markets Practice and Co-Managing Partner of the Firm’s Washington, D.C. office, Josh Bonnie is one of the preeminent IPO lawyers in the nation and regularly counsels public companies on spin-offs and other significant strategic transactions, capital markets offerings and general corporate and securities law matters. Josh’s transactional experience also includes business combinations involving special purpose acquisition companies. Josh has been featured in The American Lawyer’s “Dealmakers of the Year,” is recognized in Chambers Global: The World’s Leading Lawyers for BusinessChambers USA: America’s Leading Lawyers for Business and The Legal 500 United States as one of the leading capital markets practitioners in the United States, and is endorsed by PLC Which Lawyer?.
Ryan Brizek - Partner - Headshot
Ryan Brizek - Partner

A Partner in the Firm’s Registered Funds Practice, Ryan Brizek focuses his practice on transactional and regulatory matters involving mutual funds, closed-end funds, business development companies, exchange-traded funds and their investment advisers, with a particular focus on providing access to alternative investment strategies through regulated vehicles. He also provides strategic investment management regulatory advice to asset management firms in M&A transactions and serves as transaction counsel to registered funds and their underwriters in capital markets transactions. Ryan was named a “Rising Star” at the 2019 Mutual Fund Industry Awards.

Christopher Brown - Partner - Headshot
Christopher Brown - Partner

Chris Brown concentrates his practice on banking and finance. He has represented private equity sponsors and their portfolio companies, as well as public and private companies, in a wide variety of secured lending and other financing transactions. In addition, Chris has worked for many clients on matters involving general secured finance issues, debt restructurings and related corporate issues. His clients have included AEA Investors, Allegion, Alterra Mountain Company, AMG, Angeles Equity Partners, Best Buy, BlackRock, Blackstone, Blommer Chocolate, Carlyle, Charterhouse Capital Partners, Cimpress, Evercore Partners, Fieldwood Energy, Francisco Partners, frontdoor, Goldman Sachs, Hershey, Ingersoll Rand, JLL Partners, KSL Capital Partners, Microsoft, New Mountain Capital, Primavera Capital Partners, Riverstone, Stonepeak Infrastructure Partners, TCW and ZoomInfo. 

Rajib Chanda - Partner - Headshot
Rajib Chanda - Partner Hailed as a “Trailblazer” by the American Lawyer for his legal contributions to the democratization of access by ordinary investors to private markets investments, Rajib helps asset management firms design, develop and structure investment products. Rajib heads the firm’s Registered Funds practice. Rajib regularly represents the leading asset management firms in the US, including recent representations of AMG, Angelo Gordon, Apollo, Ares, Artisan Partners, BC Partners, Blackstone, Carlyle, First Eagle, JPMorgan Asset Management, KKR, New Mountain, Oaktree, Onex Credit, PIMCO, Sixth Street Partners, SkyBridge Capital and Third Point, among others.
Jonathan L. Corsico - Partner - Headshot
Jonathan L. Corsico - Partner

Jonathan Corsico leads the Firm’s Mergers and Acquisitions practice in Washington, D.C., where he represents private equity firms, corporations and boards of directors in a wide range of matters, public and private, friendly and hostile, domestic and cross-border. In addition to M&A, Jon also has significant experience representing clients in connection with stockholder activism, joint ventures, restructurings and minority investments.

Abram J. Ellis - Partner - Headshot
Abram J. Ellis - Partner

Recognized as a “Rising Star” and “Next Generation Lawyer” in antitrust litigation, Abram Ellis is a Partner in the Firm’s Washington, D.C. office. His practice comprises all aspects of competition law, from defending clients against complex class action antitrust litigation to helping clients obtain regulatory clearance from domestic and international competition authorities for significant transactions. Abram is particularly experienced in antitrust litigation involving complex financial instruments, the healthcare industry and employment issues. He has been recognized for his antitrust work in Benchmark Litigation, The Legal 500 and Super Lawyers.

In addition to his robust antitrust practice, Abram advises leading private equity funds, financial institutions and major corporations on regulatory and compliance matters relating to cross-border activities, including with respect to OFAC, FCPA and export matters.

Crystal L. Frierson - Partner - Headshot
Crystal L. Frierson - Partner

Crystal Frierson is a Partner in the Firm’s Private Funds Practice. She advises sponsors on the formation, structuring and management of private investment funds across a range of asset classes as well as on co-investments and separately managed accounts. She also counsels clients in respect to private investments in alternative asset managers. Crystal regularly represents some of the largest and most prominent fund sponsors including The Carlyle Group, Blackstone, Hellman & Friedman and Platinum Equity.

William R. Golden - Partner - Headshot
William R. Golden - Partner

Based in Washington, D.C., Will Golden is a Partner in the Firm’s Capital Markets Practice. Will represents issuers, private equity sponsors and underwriters in a wide range of securities offerings, including initial public offerings, follow-on and secondary equity offerings, spin-offs, high yield and investment grade debt offerings and acquisition financing transactions, as well as exchange offers and other liability management transactions. Will also advises clients on ongoing public reporting, compliance and corporate governance matters.

David J. Greene - Partner - Headshot
David J. Greene - Partner Based in our Washington, D.C. office, David J. Greene is a Partner in the Firm’s Investment Funds Practice. David’s practice focuses on private fund formation and operation, as well as related alternative assets. He has represented sponsors in their global fundraising activities including energy and infrastructure funds, natural resource funds and other private investment vehicles. David regularly publishes articles on topics relating to the private funds industry and has been recommended by The Legal 500 United States. Named a “DC Rising Star” by The National Law Journal, David was also recently recognized at Euromoney’s “Americas Rising Stars” awards for his work forming the $18.5 billion Carlyle Partners VII fund.
Meaghan A. Kelly - Partner - Headshot
Meaghan A. Kelly - Partner

Meaghan Kelly is a Partner in the Firm’s Government and Internal Investigations Practice, where she focuses on high-stakes regulatory and government investigations for financial institutions, multinational corporations, investment managers and individuals. Meaghan frequently represents public company and investment adviser clients before the Enforcement Division of the Securities and Exchange Commission. As a key member of the Firm’s Funds Regulatory and Investigations Practice, she specializes in advising fund managers with respect to SEC examinations and routinely provides fund managers with practical and timely solutions to compliance, governance and disclosure questions. She also has significant experience representing clients with respect to derivative actions and other high-profile disputes. Meaghan was recently named to Global Investigation Review’s 2020 “40 Under 40,” which profiles 40 leading young investigations specialists from around the world.

Jeffrey H. Knox - Partner - Headshot
Jeffrey H. Knox - Partner

Jeff Knox, Co-Managing Partner of the Firm’s Washington, D.C. office and the former head of the U.S. DOJ Fraud Section, represents multinational corporations and independent board committees in high-stakes investigations by the DOJ, SEC, CFTC, and other federal and state enforcement regulators. He has advised some of the world’s leading financial institutions, energy companies, life sciences companies, and technology firms in navigating criminal and civil investigations relating to the FCPA, securities and accounting fraud, market manipulation, False Claims Act, antitrust, international money laundering, economic sanctions, and environmental crimes. Jeff also represents senior executives, in their individual capacity, who are subjects of enforcement investigations. Jeff has served as a government-appointed independent compliance consultant, and represents companies in government and court-mandated monitorships. Prior to joining the Firm, Jeff served as a federal prosecutor for more than a decade, including as the Chief of the DOJ’s Fraud Section in Washington, D.C., and before then, as the Chief of the National Security Section of the U.S. Attorney’s Office for the Eastern District of New York. 

Jeff was named a White Collar MVP by Law360 in 2021, and is recognized by Chambers USA, Chambers Global, The Legal 500 and Euromoney’s Benchmark Litigation, where sources note him as “outstanding, a DOJ veteran and one of the top defense lawyers in DC,” “pragmatic, incredibly smart” and “a master strategist with a unique insight into the way the DOJ works,” who “presents very charismatically and effectively,” and has “a good combination of substantive expertise and practical knowledge” that “really adds value to the client.” He is a respected voice on corporate compliance and enforcement policy, and serves on advisory boards dedicated to these issues at NYU School of Law and the American Law Institute.     

Keith A. Noreika - Partner - Headshot
Keith A. Noreika - Partner

Leading bank regulatory attorney and former Acting Comptroller of the Currency, Keith Noreika advises domestic and international financial institutions on regulatory issues relating to mergers and acquisitions, minority investments, capital issuances, structuring and compliance activities, and litigation matters, particularly in the area of federal preemption. Keith has consistently been recognized as a leader in his field by Chambers USA in Financial Services Regulation: Banking (Compliance) since 2014, and was named a Financial Services Litigation All-Star by BTI Client Service in 2015. 

Sara Y. Razi - Partner - Headshot
Sara Y. Razi - Partner

Sara Razi is Global Co-Chair of the Firm’s Antitrust and Trade Regulation Practice. She is a leading antitrust attorney, focusing on merger reviews, government antitrust investigations, antitrust litigation, and counseling on a variety of competition issues. Sara joined Simpson Thacher in 2013 after serving as a senior official at the Federal Trade Commission for nearly a decade. 

Sara regularly represents clients in antitrust investigations by the DOJ, FTC, and States and has secured successful outcomes in several complex and closely-watched mergers and high-profile antitrust litigations. Her extensive private-sector and government antitrust experience spans a multitude of industries including media, telecommunications, technology, supermarkets and other retail, oil and gas, consumer products, healthcare providers, pharmaceuticals, and financial services.

Sara is recognized as a “Leading Lawyer” by The Legal 500, where she is noted as “a very seasoned and knowledgeable antitrust attorney” who “has the unique ability to give very practical advice about how regulators would react to matters,” and is ranked as one of the “Top 250 Women in Litigation” in the U.S. by Euromoney’s Benchmark Litigation. She is also featured as one of Global Competition Review’s 2021 “Women in Antitrust” and separately described by the publication as one of the “best FTC merger advisers in the business.” Sara is an authority on antitrust issues and speaks frequently at conferences sponsored by the ABA, law schools, and private organizations. She also serves as Co-Chair of the Firm’s Pro Bono Committee.

Benjamin Rippeon - Partner - Headshot
Benjamin Rippeon - Partner

A Partner in the Firm’s Tax Practice, Benjamin Rippeon provides a wide range of clients with sophisticated, solutions-oriented advice related to domestic and international tax issues. He focuses on tax planning for investment funds and strategic corporate and real estate acquisitions, dispositions and reorganizations. His diverse group of clients include corporations, investment funds, joint ventures, partnerships, limited liability companies and special purpose acquisition companies (SPACs). Benjamin has also advised on the formation of numerous private REITs in connection with real estate acquisitions and dispositions involving U.S. and non-U.S. investors, including sovereign wealth funds.

Cheryl J. Scarboro - Partner - Headshot
Cheryl J. Scarboro - Partner Cheryl Scarboro, formerly an Associate Director in the SEC’s Division of Enforcement and the first Chief of the SEC’s FCPA Unit, represents corporations, financial institutions and individuals in SEC and other regulatory enforcement proceedings. Cheryl conducts internal investigations and counsels clients on FCPA compliance programs, SEC reporting, disclosure and corporate governance requirements. Cheryl is recognized as a leading individual in FCPA by Chambers USA Nationwide and Chambers Global, where sources describe her as a “calm, cool, confident counsel” with an “immense amount of credibility” and as “universally unflappable when it comes to high-stakes situations.” She was also recognized as one of the “25 Most Influential Women in Securities Law” by Law360, one of the “Top 10 Women in Litigation” by Euromoney’s Benchmark Litigation, and was named to the “Enforcement 40” by the Securities Enforcement Forum. She is also consistently listed in the “Top 250 Women in Litigation” by Benchmark Litigation. Cheryl was recently recognized as part of Corporate Counsel’s “Women, Influence & Power in Law Awards” and named to Global Investigations Review’s “Women in Investigations” and “The Top FCPA Practitioners” 2021 lists, with the profile highlighting that, “few lawyers, if any, can match [Cheryl’s] credentials.” Cheryl was also named to Savoy Magazine’s “2018 Most Influential Black Lawyers” list. Cheryl is consistently recommended by The Legal 500 in white collar and was named a National “Litigation Star” by Benchmark Litigation. In addition, she is a member of the Global Advisory Board of the Women in Law Empowerment Forum, and a member of the Board of Visitors of Duke University School of Law.
John Terzaken - Partner - Headshot
John Terzaken - Partner A leading antitrust litigator and former federal prosecutor, John Terzaken is Global Co-Chair of the Firm’s Antitrust and Trade Regulation Practice. John represents corporate and individual clients involved in government enforcement of antitrust, fraud and other white collar violations, as well as related follow-on civil litigation. His experience spans market sector investigations and litigation in all major industries, including financial services, pharmaceutical, professional services, manufacturing, energy, shipping, food and beverage, and many others. John previously served as the Director of Criminal Enforcement of the Department of Justice, Antitrust Division, where he oversaw the Division’s criminal enforcement and litigation nationwide. He has earned awards of distinction from the Attorney General of the United States and the Assistant Attorney General for the Antitrust Division. He is consistently recognized as a leading antitrust lawyer (Band 1) by both Chambers Global and Chambers USA, where clients describe him as “. . . very strategic and creative with investigations,” “one of the strongest lawyers I have ever worked with,” “. . . a superb lawyer in the cartel space,” “highly professional and very responsive,” an attorney who is “extremely well respected,” “. . . smart, provides practical guidance and brings a lot to the table with his DOJ background,” “knows the technical aspects of antitrust law and also how to intuitively apply that to business realities,” and has a “wonderful working manner with clients and government figures.” John is recognized as a “Litigation Star” both nationally and in D.C. by Euromoney’s Benchmark Litigation and is recognized in The Legal 500 U.S. “Hall of Fame,” where sources say he is “an excellent and seasoned counsel with strong technical expertise.” John is also recognized by Who's Who Legal: Competition.
Malcolm J. (Mick) Tuesley - Partner - Headshot
Malcolm J. (Mick) Tuesley - Partner Malcolm “Mick” Tuesley, Head of the Firm’s National Security Regulatory Practice, has significant experience representing clients in national security reviews before the Committee on Foreign Investment in the United States (CFIUS) and assisting clients with related issues, including mitigation of foreign ownership, control or influence (FOCI) under industrial security regulations; export control compliance; and government contracting. Mick has been involved with negotiating national security agreements for some of the largest and most complex transactions in the defense, energy, financial services, telecommunications and technology industries. Mick was named a Law360 “MVP” for International Trade in 2019. He is consistently recognized by The Legal 500, where sources call him “outstanding” and “an expert in FOCI mitigation issues and a creative problem solver.” He is also consistently recognized by Chambers USA and Chambers Global, where commentators note his “good sense of both CFIUS and corporate law.” Mick currently serves on the Bladder Cancer Advocacy Network’s Board of Directors.
Adeeb R. Fadil - Senior Counsel - Headshot
Adeeb R. Fadil - Senior Counsel

Adeeb Fadil is Senior Counsel in the Firm’s Corporate Department and Environmental Practice. He focuses on environmental aspects of transactions, as well as on environmental liability management, compliance counseling and dispute resolution. Adeeb has been recognized as a Leading Lawyer in recent years in Environment: Transactional by The Legal 500 United States, and has been consistently ranked in Band 1 for Environmental-Mainly Transactional by Chambers USA since 2010 (in New York through 2018, and in DC since 2019), where in recent years he has been praised for his “innovative approach to problem-solving,” and for being “smart and assertive, but also low-key, and he gets the deal done.” In addition, The Best Lawyers in America named him its 2016 Environmental Law “Lawyer of the Year” for New York City.

William H. Hinman - Senior Advisor - Headshot
William H. Hinman - Senior Advisor

Former Director of the Securities and Exchange Commission’s Division of Corporation Finance, Bill Hinman focuses on a wide range of corporate and securities law matters—including some of the most significant initial public offerings in history. Bill also represents clients in connection with corporate acquisitions and governance matters. Widely recognized as a leading corporate law practitioner, Bill has extensive experience across an array of industries, including technology, e-commerce, digital assets, healthcare and life sciences. He played a lead role in the IPOs of Alibaba, Facebook, Google, eBay, Square, Agilent, Seagate and VMware, among many others.

During his tenure at the SEC between 2017 and 2020, Bill led the Division of Corporation Finance on a wide range of issues vital to the success of the nation’s capital markets.

Vanessa K. Burrows - Counsel - Headshot
Vanessa K. Burrows - Counsel

With experience involving Food and Drug Administration (FDA) and other healthcare regulatory matters, Vanessa has advised pharmaceutical and medical device manufacturers, healthcare and technology companies, hospitals and other providers in connection with regulatory and compliance needs, as well as in connection with M&A and capital-raising transactions. Vanessa has extensive experience counseling clients with respect to Health Insurance Portability and Accountability Act (HIPAA) compliance, health privacy, security and breach issues, pharmacy law, cannabis and hemp laws, and public health matters. Vanessa is Counsel in our Washington, D.C. office.

Adam J. Cohen - Counsel - Headshot
Adam J. Cohen - Counsel Former Counsel at the Board of Governors of the Federal Reserve System, Adam Cohen is Counsel in the Firm’s Financial Institutions Group in the Washington, D.C. office. Adam’s practice focuses on financial services regulation, particularly as they relate to interpreting regulations, mergers and acquisitions, structuring investments in banks, bank holding companies and new business lines, and in securities offerings.  
Steven Grigoriou - Counsel - Headshot
Steven Grigoriou - Counsel

Steven Grigoriou is a member of the Firm’s Registered Funds Practice, where he advises a wide array of registered funds, business development companies and multinational investment advisers on a broad range of corporate transactions. He regularly represents public funds, fund sponsors, investment advisers, investment banks and other financial institutions on the design, formation and structure of investment funds and products, securities offerings, regulatory and compliance matters, as well as other corporate matters. Steven was named a “Rising Star” at the 2021 Fund Intelligence Mutual Funds Industry & ETF Awards. 

Christopher  P. Healey - Counsel - Headshot
Christopher P. Healey - Counsel

Based in the Firm’s Washington, D.C. office, Christopher Healey is Counsel in the Registered Funds Practice. With what clients describe as “unparalleled knowledge” (The Legal 500 United States), Christopher frequently counsels clients on novel applications for SEC exemptive relief and investment company status issues under the Investment Company Act of 1940, as well as on the development of innovative retail products and complex asset management M&A transactions. Christopher’s practice focuses on advising registered funds, business development companies (BDCs), investment advisers and fund boards. He has represented preeminent sponsors and investment managers such as BC Partners, Blackstone, Carlyle and First Eagle, among others. Christopher was named a “Rising Star” at Fund Intelligence’s 2020 Mutual Funds Industry and ETF Awards.

Diana C. Wielocha - Counsel - Headshot
Diana C. Wielocha - Counsel

Diana Wielocha is Counsel in the Firm’s Litigation Department and a member of the Firm’s Government and Internal Investigations Practice. She represents multinational corporations, boards, and executives in high-stakes investigations by the DOJ, SEC and other federal and state agencies. Diana also handles sensitive internal investigations on behalf of companies across a variety of industries.