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435731

Practice:

  • Restructuring
  • Bankruptcy Litigation

Michael Trentin Senior Associate

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.  

439645

Practice:

  • Banking & Finance
  • Restructuring
  • Private Credit

Robert Trust Partner

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.”

Sarah Jane Ungeheuer Managing Associate

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.

464421

Practice:

  • Strategic Advisory & Government Enforcement (SAGE)
  • Financial & Fintech Advisory
  • Consumer Finance Regulatory
  • Fintech

Christopher Walczyszyn Managing Associate

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. 

362315

Practice:

  • Global Investigations
  • Securities Litigation
  • Trials
  • Strategic Advisory & Government Enforcement (SAGE)

Amy Walsh Partner

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.

Practice:

  • Technology & Innovation Sector
  • Intellectual Property
  • Cyber, Privacy & Data Innovation
  • Patents
  • Trade Secrets Litigation
  • IP Counseling & Due Diligence
  • Mass Torts & Product Liability
  • Antitrust & Competition
  • International Trade and Investment
  • White Collar, Investigations, Securities Litigation & Compliance
  • Employment Law & Litigation
  • Trademark, Copyright & Media
  • China

Xiang Wang Partner

Beijing; New York

Xiang is a Guiding Expert of the China Overseas IP Dispute Response & Guidance Center.

He also serves several consultancy roles for local regulatory authorities, including as IP Guiding Expert of Shenzhen IP Protection Center; IP Guiding Expert of Zhejiang Province IP Protection Center; IP Consultant of Technology Innovation Bureau of Nanjing Jiangbei New Area Management Committee (Jiangsu Province); Expert of IP Dispute Investigation and Appraisal of Foshan Market Supervision and Administration Bureau (Guangdong Province); Expert for Overseas IP Protection and Assistance of Foshan Intellectual Property Bureau (Guangdong Province); and Guiding Expert of Shantou Overseas IP Center and Shunde Enterprise IP Protection Center (Guangdong Province).

Dr. Wang is an arbitrator of Beijing Arbitration Commission and Beijing International Arbitration Center.

Xiang has extensive experience in assisting local and foreign-based multinational companies with all aspects of their IP rights in the U.S. and China, including IP litigation and arbitration, patent infringement, industrial espionage, trade secret misappropriation, copyright and trademark infringement, ITC Sec. 337 investigations, patent office proceedings including inter partes reviews (IPR), IP due diligence and portfolio counseling, technology export control, mass torts and product liability, securities litigation, the Foreign Corrupt Practices Act (FCPA) and other investigations and compliance. These matters have implicated a vast array of technologies, from software and electronics to renewable energy and medical devices as well as agricultural and building materials, to name just a few.

Xiang also works extensively on cybersecurity investigations and data privacy compliance matters for both Chinese and international clients.

Xiang has been particularly active in Chinese state-owned enterprises related U.S. litigation. Clients turn to his strategic and innovative advice thanks to his in-depth understanding of their business needs and political risks. Clients appreciate that he “understood the environment in the China legal system and can give nuanced advice”.

Xiang has developed the region’s premier IP practice based on his reputation as one of the few IP lawyers who has a doctorate in electrical and computer engineering, a Juris Doctor, a Chinese Certificate of Laws, and admission to practice law in New York, Indiana and before the U.S. Patent and Trademark Office. Due to its success in patent disputes in the United States and China, involving both foreign and Chinese companies, Orrick IP team was exclusively featured in a documentary film “Patent Wars” by the China Central Television (CCTV).

Xiang is highly regarded for his practical legal advice that results from more than ten years of experience at medical and electronic device businesses before becoming a lawyer. He also has received four U.S. medical-technology patents in his name.

468221

Practice:

  • Energy & Infrastructure
  • Energy
  • Infrastructure
  • Renewable Energy
  • Solar Energy
  • Wind Energy
  • Power

Rob Warfield Partner

New York

He has experience representing financial institutions, sponsors, investors, and lenders in energy and infrastructure financings, acquisitions, joint ventures and other transactions.

Prior to joining Orrick, Rob was a member of the legal investments team at a global investment firm in New York, where he supported private equity and credit investments across infrastructure and other asset classes. He also worked in private practice at leading international law firms.