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  • White Collar, Investigations, Securities Litigation & Compliance

Radiah L. Rondon Associate White Collar, Investigations, Securities Litigation & Compliance

Washington, D.C.

Radiah has extensive experience in all aspects of litigation including discovery, pre-trial, negotiations and drafting settlements. Radiah has worked on a number of internal investigations for publicly traded companies including investment banks and broker-dealers, regarding their internal corporate compliance.

Radiah L. Rondon is an Associate in the White Collar, Investigations, Securities Litigation & Compliance group. Radiah’s practice includes representing multinational corporations in enforcement actions brought by the Department of Justice (DOJ) and Securities Exchange Commission (SEC) for alleged violations of the Foreign Corrupt Practices Act (FCPA).

Before joining Orrick, Radiah spent three years working as Compliance Director and In-House Counsel for an influential lobbying organization. Prior to that, Radiah was an Associate in the Washington D.C. office of an international law firm in the General Litigation department where her practice included representing companies and individuals across a broad range of industries in government and internal investigations, and anti-corruption and compliance matters.



  • Complex Litigation & Dispute Resolution

Amy Roper Associate Complex Litigation & Dispute Resolution


Amy Roper, an associate in the London office, is a member of the Complex Litigation and Dispute Resolution team. Amy has experience advising on a wide range of commercial litigation and dispute resolution matters, including High Court litigation and professional discipline proceedings.

Amy joined Orrick as a trainee in August 2015 and also has experience working in the Finance, Restructuring, Corporate, Employment and Real Estate groups.


  • Public Finance

Justin B. Rosas Associate Public Finance


Justin is a public law attorney in the Austin Public Finance Group. He works with public entities and financial institutions on public finance transactions that lead to community development.

Justin’s practice focuses on public finance, which includes the representation of local government entities, including: state agencies, municipalities, school districts, and special districts; non-profit organizations; and financial institutions that serve as underwriters to municipal bonds. Prior to joining Orrick, Justin represented and counseled government entities and private corporations in litigation matters. 



  • Complex Litigation & Dispute Resolution

Camille Joanne Rosca Managing Associate Complex Litigation & Dispute Resolution

New York

Camille Joanne Rosca is a litigation associate in Orrick's New York Office.

Prior to joining Orrick, Camille served as a law clerk to Justice Anne M. Patterson of the New Jersey Supreme Court. In 2014, she was a summer associate in the firm's New York office.



  • Energy
  • Infrastructure
  • Power
  • Renewable Energy

Hannah Roscoe Partner Energy, Infrastructure


Hannah advises on transactional and regulatory matters in the energy and infrastructure sector, including complex project developments and financings, mergers and acquisitions and commercial contracts (including corporate PPAs and other innovative routes to market). She helps clients to navigate complex issues and difficult negotiating situations by providing simple and pragmatic solutions.

Hannah's expertise in energy and infrastructure projects makes her able to provide relevant, focused and highly commercial advice. She is particularly renowned for her experience in the UK power sector.

Hannah has also spent time in-house on secondment to an infrastructure fund and an energy trading business.


  • Antitrust & Competition

Matthew Rose Of Counsel Antitrust & Competition


Matthew Rose, Of Counsel in Orrick's London office, is a member of the Antitrust and Competition Group. Matthew's practice focuses mainly on EU and UK competition and regulatory law, including advising on merger control, anti-competitive conduct (including cartels, abuse of dominance and other restrictions on competition) and competition litigation.

Matthew undertook an eight-month secondment at the Office of Fair Trading (the UK competition regulator, now the Competition and Markets Authority) during which he provided legal advice on a number of competition enforcement cases.



  • Banking & Finance
  • Direct Lending
  • Distressed Assets & Alternative Investments
  • Fintech

B. J. Rosen Partner Banking & Finance, Direct Lending

New York

B. J. Rosen, a partner in Orrick’s New York office, serves as Global Head of Direct Lending. B. J. has a focus on advising alternative lenders and BDCs in connection with a variety of leveraged finance transactions.

In addition, he advises top tier investment banks on syndicated credit facilities for acquisition finance transactions, dividend recapitalizations, corporate refinancings and debtor-in-possession financings.  

Before joining Orrick, B. J. practiced with Cravath, Swaine & Moore LLP, focusing on a wide variety of syndicated lending, equity and debt securities, M&A and corporate advisory matters.

B. J. serves as Senior Outside Legal Advisor for The Innocence Project, an organization dedicated to exonerating wrongly-convicted prisoners through DNA testing.



  • Tax
  • Corporate Tax
  • International Tax

Jonathan Rosen Partner Tax, Corporate Tax


Jonathan advises clients on all aspects of corporate tax, with a focus on domestic and international corporate and finance transactions, mergers and acquisitions, restructurings and reorganisations.

He has extensive experience of UK, cross-border and international tax matters across a variety of business sectors. Jonathan also advises on tax disputes, funds and investment structures.

Jonathan is qualified as a Chartered Tax Adviser (CTA) and is a member of the Chartered Institute of Taxation.



  • Employment Law & Litigation
  • Discrimination, Harassment & Retaliation
  • Pay Equity
  • Whistleblower & Corporate Investigations
  • Traditional Labor Law
  • Wage and Hour

Jill Rosenberg Partner Employment Law & Litigation, Discrimination, Harassment & Retaliation

New York

Jill Rosenberg, a New York employment law partner, is a nationally recognized employment litigator and counselor. Jill has significant experience defending and advising employers in discrimination, sexual harassment, whistleblowing, wrongful discharge, affirmative action, wage-and-hour and traditional labor matters. In recognition of Jill's practice, Chambers USA and Chambers Global awarded her a Band 1 ranking, with clients calling Jill "a terrific lawyer," noting her "stellar reputation for her representation of clients in employment litigation and internal investigations," and her "smart, responsive and practical approach to advice and litigation."

She handles complex individual cases, as well as class actions and systemic government investigations. She represents a broad range of companies, including employers in the securities industry, banks and financial institutions, accounting firms, law firms, and employers in the technology and media industries. Jill also has particular expertise in the representation of nonprofit entities, including colleges, universities, hospitals, foundations and cultural institutions.

She designs and conducts training programs for clients and frequently speaks on employment law issues for employer and bar association groups such as National Employment Law Institute, Practising Law Institute, National Association of College and University Attorneys and the New York State Bar Association.



  • Technology Companies Group

Chris Rosene Associate Technology Companies Group

Santa Monica

Chris Rosene, an associate in Orrick's Santa Monica office, is a member of the Technology Companies Group.

Chris represents high growth technology companies and venture capital firms in many areas, including corporate and securities law, corporate formations, and venture capital financings.

Chris earned his J.D. in 2018 from the UCLA School of Law, where he was elected to the Order of the Coif.  While in law school, Chris served as Dialectic Editor of the UCLA Law Review and was a judicial extern for the Honorable Holly Kendig at the Los Angeles Superior Court.  Chris graduated from Ball State University in 2013 with a Bachelor of Science degree in Mathematical Economics.



  • Antitrust & Competition
  • Complex Litigation & Dispute Resolution

Robert Rosenfeld Senior Counsel Antitrust & Competition, Complex Litigation & Dispute Resolution

San Francisco

Robert Rosenfeld, a partner in Orrick’s San Francisco office, focuses on antitrust, complex commercial litigation and financial institutions.

For more than a decade, Bob has represented Microsoft Corporation in numerous antitrust proceedings in California and elsewhere in the United States and abroad. In addition, he provides advice regarding antitrust issues to companies in Silicon Valley. He also has advised major health insurance companies and has litigated a number of cases involving the application of antitrust principles in the health care marketplace.

Bob's practice also includes complex business litigation, principally on behalf of major financial institutions. He has represented and counseled special litigation committees in the conduct of internal investigations and the prosecution and defense of derivative litigation. In 2011, Competition Law 360 listed him as one of 15 U.S. lawyers identified in a survey of corporate counsel as providing exceptional client service in antitrust matters.  He also served as Chair of Orrick's Antitrust & Competition Group for over eight years. 

From 1986 until 1992, Bob traveled to the Soviet Union on a number of occasions to participate with Soviet lawyers and academics in projects involving commercial matters and human rights issues.

Before joining Orrick, Bob practiced at Heller Ehrman LLP.



  • Supreme Court & Appellate
  • Intellectual Property
  • Complex Litigation & Dispute Resolution
  • White Collar, Investigations, Securities Litigation & Compliance
  • Antitrust & Competition

E. Joshua Rosenkranz Partner Supreme Court & Appellate, Intellectual Property

New York

Josh Rosenkranz is co-head of the firm’s Supreme Court & Appellate Litigation practice.

A former law clerk to U.S. Supreme Court Justice William J. Brennan Jr. and then-Judge Antonin Scalia on the D.C. Circuit, Josh has personally argued more than 200 appeals in state and federal appellate courts across the nation, including 18 before the U.S. Supreme Court.

Josh is the only lawyer ever named American Lawyer's “Litigator of the Year” twice. In 2012, the magazine dubbed him “the Defibrillator” based on his streak of appellate wins for companies that “appeared to be at death’s door,” and in 2017 it declared, he “still deserves the moniker we once gave him.”

Chambers USA has reported, “He wins accolades for his ‘brilliant analysis and judgment.’ Clients appreciate how he ‘rethinks every case from the ground up,’ and add: ‘He can take the most complicated legal or technological issue and present it in a way that seems like common sense.’” Another edition of Chambers USA added: “‘His briefs are quite simply beautiful,’” and “clients describe his courtroom presence as ‘both commanding and accessible at the same time.’ He has the ‘perfect combination of persuasiveness, intelligence, wit, and deference.’”

Josh's practice covers a wide range of subjects, including securities, intellectual property, antitrust, federal preemption, insurance law, corporate governance, criminal law and constitutional litigation. Among his recent clients are Credit Suisse, DIRECTV, DISH Network, Facebook, Genentech, Gilead, JPMorgan Chase, Kleiner Perkins, LinkedIn, Microsoft, Morgan Stanley, Oracle, and Royal Bank of Scotland.

Clients turn to Josh to win the highest stakes appeals, including appeals in cases that threaten the very survival of a business. He represented Microsoft in an international cause célèbre in the U.S. Supreme Court challenging the U.S. Government’s claim that it can serve warrants for emails stored overseas. He represented DISH Network in one of the most high-profile patent appeals in the country, successfully overturning an injunction that threatened the company's life. He represented Facebook in the high-profile battle waged by the founder's Harvard classmates, the Winklevoss twins, who laid claim to the idea for Facebook, winning a ruling from the Ninth Circuit to end the lawsuit. 

In 2005, he successfully represented Merck KGaA in a Supreme Court case that the National Law Journal described as “the most significant patent infringement case to confront the biotech and pharmaceutical industries in a generation.” He represented 36 law schools in a high-profile Supreme Court case against the Department of Defense. He also won a landmark victory in a Supreme Court case that rescued the estimated $60 billion U.S. market of copyrighted goods manufactured abroad.

Josh was the founding president and CEO of the Brennan Center for Justice at New York University School of Law, one of the country’s foremost public interest firms. Over the course of eight years, he was the Brennan Center’s chief strategist on litigation and public policy advocacy. Under his direction, the center represented parties in connection with more than 50 cases (including three at the U.S. Supreme Court). Before creating the Brennan Center, Josh founded the Office of the Appellate Defender, a public defender office specializing in criminal appeals.

Josh has published numerous books, monographs, chapters and scholarly articles. He has also authored 18 op-eds or articles in major newspapers and magazines, including The New York Times, The Washington Post, The Los Angeles Time, The Chicago Tribune, The Washington Monthly, The Boston Review, The National Law Journal, and The American Prospect.