New York
A veteran antitrust litigator, Rob has litigated and counseled on high-profile antitrust matters on behalf of leading companies in a wide range of sectors, including litigated merger challenges, putative antitrust class actions, government antitrust investigations, and private actions against competitors. He has successfully litigated cutting-edge competition matters, including defending against allegations of algorithmic collusion and price-fixing through the use of software.
From late 2018 through early 2019, Rob completed a secondment at the litigation department of a major media company.
Rob maintains an active pro bono practice, where his work has focused primarily on benefits applications and appeals for low-income disabled veterans.
Prior to joining Orrick, Rob was an active-duty Army JAG officer, where he served as a Special Assistant U.S. Attorney, an administrative law attorney, and a special victims counsel, among other roles. As a Special Assistant U.S. Attorney, he first-chaired more than 10 trials in federal court, including two jury trials.
New York; Silicon Valley
New York; Silicon Valley
Stephen’s practice focuses on the representation of life science, medical device, health IT, and other technology companies in transactional matters, including public and private financings, licensing, collaborations and strategic alliances, and mergers and acquisitions. He also represents venture capital firms in public and private financing transactions.
Stephen is recognized as a Leading Life Sciences Lawyer by LMG Life Sciences in their 2021/2022 rankings and short-listed as Venture Capital Attorney of the Year. He has served as a member of the Board of Tech Council of Maryland, the leading technology and life science association in that state, and of BayBio, Northern California’s leading life sciences association. Stephen is a frequent speaker on venture capital financings and served on the faculty at the 2005 and 2007 Emerging Entrepreneurs workshops at Stanford University.
Prior to joining Orrick, Stephen was a partner at Morrison & Foerster, Venture Law Group and Heller Ehrman. He began his legal practice as a litigator, focusing on securities and intellectual property. He also served as a law clerk to the Hon. Vaughn R. Walker in the United States District Court in the Northern District of California. Stephen graduated Order of the Coif from Stanford Law School, where he was managing editor of the Stanford Law Review, and graduated magna cum laude from Harvard College in Biology.
New York
Orrick’s Employment Law and Litigation group was recently named Labor & Employment Department of the Year in California by The Recorder, the premier source for legal news, in recognition of their significant wins on behalf of leading multinational companies on today’s most complex and challenging employment law matters.
In addition to his litigation practice, Mark advises clients regarding a broad range of employment issues, including human resource policies and procedures, severance agreements and employee terminations.
Prior to joining Orrick, Mark was a judicial law clerk and gained experience litigating a wide range of civil and criminal cases.
New York
Serena also represents investors and venture capital firms on their investments in early and high-growth technology companies.
New York
At the forefront of her field, Lisa helped a client obtain the first authorization from the DOE to export domestic natural gas as LNG to all trading partners, and represented the first bi-directional LNG terminals proposed in the United States in proceedings before FERC.
Lisa has been recognized both nationally and globally as a leading practitioner by Chambers Global, Chambers USA, and The Legal 500 for more than a decade.
“Lisa Tonery comes highly recommended for her considerable expertise in representing major clients in high-value LNG proceedings . . . Sources say: ‘She's an expert . . . she really understands the critical issues.’” (Chambers Global)
"Client-focused, business-minded and dogged in the pursuit of her clients' interests. Her depth of knowledge is best-in-class. She has extensive relationships with FERC at all levels and is very pleasant to work with." (Chambers USA)
San Francisco; New York
Mike was Orrick's Securities Litigation practice leader from 2004 to 2012.
He has the unique ability to look at corporate governance problems from a business perspective, to carefully navigate or avoid collateral consequences, and strategically win legal problems. He is frequently recognized for his exemplary work by Chambers, Super Lawyers and The Daily Journal.
Mike focuses on litigation involving the Private Securities Litigation Reform Act of 1995, The Securities Act of 1933, the Securities Act of 1934, the Uniform Standards Act and proceedings initiated by the Securities Exchange Commission, the National Association of Securities Dealers and other self-regulatory organizations.
Mike has extensive experience in litigation involving breaches of fiduciary duty and conducting various types of corporate investigations.
New York
He argued before the U.S. Court of Appeals for the Second Circuit in Lee v. Board of Governors, a benchmark case regarding the rights of community organizations to challenge Federal Reserve Board (FRB) determinations on merger applications. He has testified before Congress and the federal banking agencies on fair lending and CRA reform, served as Special Counsel to the New York banking regulator on CRA, and advised the regulator on predatory lending regulation.
Warren regularly helps banks and bank holding companies prepare the community convenience and needs portion of their regulatory applications to merge or acquire, and he helps clients respond to public comment regarding CRA and fair lending compliance. He represented a bank in its acquisition and integration of the finance arm of major automaker, directing pre-acquisition fair lending due diligence and updating the combined entity’s policies, procedures and regulatory relations strategy. Warren also served as an independent consultant for the New York Attorney General, overseeing compliance with that office’s settlement with a company that provides criminal background checks on prospective employees.
A prolific writer and researcher, Warren’s research and statistical analysis of mortgage lending data has been cited in publications of the Federal Reserve Banks of San Francisco, Boston and Dallas; the Federal Deposit Insurance Corporation (FDIC); and in testimony before the U.S. House Financial Services Committee.
Prior to joining Orrick, Warren was senior counsel at Buckley LLP. He also served as Co-Chairman of Traiger & Hinckley LLP. Prior to entering private practice in 1990, Warren was vice president, counsel and director of government relations for the New York Bankers Association, the trade group for New York commercial banks. He also served as director of legislation and research and special counsel for the New York City Department of Consumer Affairs and as a New York State Consumer Protection Board official.
Warren is entrenched in the New York legal and financial services community. He has served on the Banking Law Committee of the New York State Bar Association, as a member of the Banking Law and Consumer Law Committees of the Association of the Bar of the City of New York, and has taught as adjunct professor of economics at Hunter College of the City University of New York.
New York
Michael has been recognized as a Rising Star in Bankruptcy by Super Lawyers since 2021. His practice spans a broad range of roles, serving stakeholders across a company's capital structure, including lenders, creditors committees, debtors and asset purchasers. Beyond his core restructuring practice, Michael is an avid litigator. He regularly represents clients in contentious matters within bankruptcy courts, as well as in chancery and federal district courts.
Before entering private practice, Michael served as law clerk in the United States Bankruptcy Court for the District of New Jersey.
New York
The principal focus of his practice has been the representation of private credit lenders, private funds, and other alternative lenders in providing credit to borrowers in special situations in a wide range of businesses and industries, including pharmaceuticals, maritime, aviation, healthcare, automatic, energy, steel, retain, financial, media, entertainment and telecom. In addition, Robert regularly represents ad hoc groups of creditors in chapter 11 restructurings and out-of-court workouts.
Robert is known for his creative, solution-oriented approach to complex restructurings and distressed transactions. As one client noted in The Legal 500 (2025): “Rob Trust’s expertise in crafting creative and effective solutions sets him apart from competitors. He has an ability to collaborate seamlessly, address complex challenges, and remain highly responsive under tight timelines, which is invaluable.”
New York
Prior to joining Orrick, Sarah worked as a pro bono fellow at New York Legal Assistance Group. At Orrick, Sarah has broad experience representing financial institutions in claims brought by investors and trustees and extensive trial experience advising clients in all stages of litigation. Sarah has supported trial teams in various matters through the discovery process, expert witness preparation, summary judgment motions, extensive trial preparation and trial. Sarah also continues to contribute to the pro bono practice at Orrick and is a member of New York Legal Assistance Group's Pro Bono Associate Advisory Board.
New York
Chris advises banks, non-banks, and other financial industry clients on a wide range of regulatory compliance and licensing issues, with an emphasis on the Truth in Lending Act (TILA), the Electronic Fund Transfer Act (EFTA), the Truth in Savings Act (TISA), the Equal Credit Opportunity Act (ECOA), the Real Estate Settlement Procedures Act (RESPA), and laws prohibiting unfair, deceptive, or abusive acts or practices. He also assists financial services providers with examinations and represents clients before the Consumer Financial Protection Bureau (CFPB) and other federal and state regulators.
New York
Amy represents individuals and institutions in government investigations, enforcement actions and prosecutions conducted by the U.S. Department of Justice (DOJ), the Securities and Exchange Commission (SEC), the Commodity Futures Trading Commission (CFTC) and the Internal Revenue Service. She negotiates resolutions with government officials, but also tries cases against the government. She is a fierce advocate for her clients, and her work often results in the government declining to bring charges.
Amy was an Assistant United States Attorney for 12 years in the United States Attorney’s Office for the Eastern District of New York, where she led dozens of investigations and cases on behalf of the U.S. government and supervised several sections within the Office.
Amy has also served as a court-appointed monitor for a global financial institution.