Gregory Bernstein
Partner
T: 949.476.8700
F: 949.476.0900
gbernstein@kelleranderle.com
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PRACTICE AREAS
Trials
Commercial Litigation
White Collar Criminal Defense
Corporate Internal Investigations
Crisis Management
EDUCATION
Harvard Law School, J.D.; Prison Legal Assistance Project, Advocate; American Constitution Society, Member.
Wharton School of the University of Pennsylvania, B.S.E., Finance, English, and Mathematics, Beta Gamma Sigma Honors Society (Top 10 percent of Wharton's Class of 2009)
Greg Bernstein is an accomplished trial lawyer who specializes in complex business and white-collar litigation, corporate investigations, and white-collar defense. Before joining KAS, Greg was a federal prosecutor in the Special Counsel's Office, Major Frauds Section of the U.S. Attorney's Office in Los Angeles, U.S. Attorney's Office in Maryland, and Criminal Enforcement Section of the DOJ's Tax Division.
During his decade-long career with the Department of Justice, Greg led or co-led 14 jury trials and 22 bench trials. He managed hundreds of investigations and prosecutions, including for securities and corporate fraud, international money laundering, evasion of anti-competitive duties, obstruction of government functions, foreign corruption, illegal offshore banking, pharmaceutical and medical device misbranding, diversion of funds by corporate officers, and violations of the Internal Revenue Code, False Claims Act, and Racketeer Influenced and Corrupt Organizations Act. In addition to being an Assistant United States Attorney, Greg served as Computer Hacking and Intellectual Property ("CHIP") counsel, Criminal Tax Coordinator, and Healthcare Fraud Coordinator. He was given myriad awards for his work on white-collar cases.
Nine of the trials for which Greg was the lead or co-lead counsel were complex white-collar matters. For instance, in United States v. Perfectus et al., Greg simultaneously went to trial against six U.S. corporations in a sprawling prosecution that involved $2 billion in losses to investors on the Hong Kong Stock Exchange and the United States government. In United States v. Dawn Bennett et al., Greg tried a high-profile securities broker indicted for defrauding private investors. In United States v. Keno Brown et al., he tried a defendant who operated an international advance fee scheme. In United States v. Hugh Robinson et al., Greg separately tried two defendants accused of wire and tax fraud. In United States v. Emmanuel Appiah, he tried a defendant who executed a protracted bank fraud and money laundering scheme that targeted multiple financial institutions. And in United States v. Howard Webber et al., Greg tried a tax case brought against an attorney and inmate in the California prison system. In each of the foregoing cases, juries convicted the defendants of all counts in the respective indictments. Put simply, Greg is a methodical trial attorney with a proven record of securing across-the-board verdicts in complex cases.
In 2022, Greg was asked to join a team of skilled federal prosecutors that formed the Special Counsel's Office. Greg was the coordinator for federal search warrants, wrote classified briefs filed by the Special Counsel's Office, and was a primary author of the Evidence Summary transmitted to the U.S. Attorney General. He led interviews of cabinet members, high-level federal and state government officials, and attorneys who represented the subjects of the investigation. Greg also litigated extensively on issues related to executive privilege, attorney-client privilege, presidential immunity, the Classified Information Procedures Act, Rule 17(c) subpoenas, and non-disclosure orders, and secured one of the highest sanction schedules against a corporate witness in U.S. history.
The Lawdragon 500 Leading Litigators in America (2026)
United States Attorney's Award for Excellence in White Collar Prosecution (2020, 2019)
DHS Award for Investigative Accomplishments in the areas of Trade, Intellectual Property, and Commercial Fraud
FBI Service Award following the wire fraud prosecution of Onijah Crighton et al.
FBI Service Award following the wire fraud trial of Keno Brown
HSI Director's Award for the prosecution of Perfectus et al.
HSI Director's Award for the prosecution of Natalie Demola et al.
HSI Financial Crimes Task Force special commendation for the prosecution of Natalie Demola et al.
DHS Trade Fraud special commendation for the trial of Perfectus et al.
DEA special commendation following the death-resulting fentanyl distribution trial of Rodney Coby
USPIS special commendation for bank fraud prosecution of Vantino Johnson et al. and Allen Lamin
Attorney General's Honors Program, United States Department of Justice
Nominated for the Attorney General's John Marshall Award for the prosecution of Perfectus et al.
Nominated for the Attorney General's Distinguished Service Award and EOUSA Director's Award following the securities fraud trial of Dawn Bennett
Representing Masimo Corporation against a lawsuit brought by former CEO and Board Chairman, Joe Kiani, who was ousted from Masimo in a 2024 proxy contest. The day of the shareholder vote, Kiani resigned as CEO and filed a lawsuit against Masimo claiming he was entitled under his employment agreement to "special compensation" worth roughly $500 million—an extraordinary amount representing five percent of the company's market cap. The case involves complex issues of corporate governance and employment law.
Representing Avid Bioservices in a legal malpractice case against the law firm K&L Gates. Avid retained K&L Gates to facilitate a $150 million convertible note offering to qualified institutional investors. The firm failed to properly advise Avid on its debt obligations under the indenture—the contract that governed the convertible note offering—resulting in default, an institutional demand for accelerated repayment, and at least $50 million in damages to Avid.
Defending Guardant Health against a lawsuit brought by Tempus AI. The case involves cutting-edge technology, including liquid biopsy assays that were developed by Guardant to detect genetic variants in cancer patients. Tempus has alleged that Guardant sought to disrupt its initial public offering, interfere with Tempus's contracts, and engage in false comparative advertising. Tempus is seeking $300 million in compensatory and punitive damages.
Prosecuting a patent lawsuit on behalf of Guardant against Tempus AI. According to the complaint, Tempus infringed on patents Guardant holds in the liquid biopsy space. In particular, Guardant alleges that Tempus's xF, xf+, and xM Monitor assays use the same technology as the tests Guardant pioneered to detect gene variants that indicate the presence of cancer.
Representing Park Place Partners in a legal malpractice case against the law firm Crosbie Gliner Schiffman Southard & Swanson ("CGS3"). Park Place retained CGS3 to facilitate a bespoke commercial lease with WeWork, a company that provided high-end office solutions. CGS3 mishandled the drafting of the financial "security package" that would protect Park Place against a WeWork breach, resulting in significant damages to Park Place.
Representing Miracle Miles Properties against allegations of fraud, corporate diversion, and commingling related to high-end real estate ventures in Southern California.
Representing the parents of a young man who, along with his roommate, was brutally murdered by a trespasser in his apartment. The wrongful death suit is being prosecuted against the Private Wealth Management company that employed the murderer. Greg is also pursuing damages against the apartment management and security companies responsible for ensuring tenant safety. Damages are in excess of $20 million.
Representing Masimo in an ongoing dispute against a major U.S. law firm that defended Masimo's former CEO and Board Chairman, Joe Kiani, against a meritorious proxy challenge in 2024. The firm unsuccessfully sought to enjoin the proxy vote, and in the process, filed false, unverified, and derogatory information against Masimo's current Chairman.
Obtained one of the highest sanction scales against a corporate witness in U.S. history, United States v. Twitter.
Tried six corporate defendants to guilty verdicts in $1.8 billion securities fraud, money laundering, and countervailing duty case, United States v. Perfectus et al.
Lead attorney in sealed foreign corruption matter that involved international money laundering, violations of currency reporting requirements, and a $1 billion economic loss to a foreign ally.
Tried Gabriel Zendejas-Chavez in a 70-defendant RICO murder case, United States v. Jose Landa-Rodriguez et al.
Prosecuted a 13-defendant bank fraud conspiracy, United States v. Natalie Demola et al.
Prosecuted an 11-defendant wire fraud conspiracy case, United States v. Hugh Robinson et al.
Prosecuted a securities broker-dealer, United States v. Dawn Bennett et al.
Prosecuted a wire fraud case against the Director of Counseling for the Archdiocese of Washington, United States v. Kenneth Patrick Gaughan.
Gregory Bernstein
Partner
EDUCATION
Harvard Law School, J.D.; Prison Legal Assistance Project, Advocate; American Constitution Society, Member.
Wharton School of the University of Pennsylvania, B.S.E., Finance, English, and Mathematics, Beta Gamma Sigma Honors Society (Top 10 percent of Wharton's Class of 2009)
EXPERIENCE
Greg Bernstein is an accomplished trial lawyer who specializes in complex business and white-collar litigation, corporate investigations, and white-collar defense. Before joining KAS, Greg was a federal prosecutor in the Special Counsel's Office, Major Frauds Section of the U.S. Attorney's Office in Los Angeles, U.S. Attorney's Office in Maryland, and Criminal Enforcement Section of the DOJ's Tax Division.
During his decade-long career with the Department of Justice, Greg led or co-led 14 jury trials and 22 bench trials. He managed hundreds of investigations and prosecutions, including for securities and corporate fraud, international money laundering, evasion of anti-competitive duties, obstruction of government functions, foreign corruption, illegal offshore banking, pharmaceutical and medical device misbranding, diversion of funds by corporate officers, and violations of the Internal Revenue Code, False Claims Act, and Racketeer Influenced and Corrupt Organizations Act. In addition to being an Assistant United States Attorney, Greg served as Computer Hacking and Intellectual Property ("CHIP") counsel, Criminal Tax Coordinator, and Healthcare Fraud Coordinator. He was given myriad awards for his work on white-collar cases.
Nine of the trials for which Greg was the lead or co-lead counsel were complex white-collar matters. For instance, in United States v. Perfectus et al., Greg simultaneously went to trial against six U.S. corporations in a sprawling prosecution that involved $2 billion in losses to investors on the Hong Kong Stock Exchange and the United States government. In United States v. Dawn Bennett et al., Greg tried a high-profile securities broker indicted for defrauding private investors. In United States v. Keno Brown et al., he tried a defendant who operated an international advance fee scheme. In United States v. Hugh Robinson et al., Greg separately tried two defendants accused of wire and tax fraud. In United States v. Emmanuel Appiah, he tried a defendant who executed a protracted bank fraud and money laundering scheme that targeted multiple financial institutions. And in United States v. Howard Webber et al., Greg tried a tax case brought against an attorney and inmate in the California prison system. In each of the foregoing cases, juries convicted the defendants of all counts in the respective indictments. Put simply, Greg is a methodical trial attorney with a proven record of securing across-the-board verdicts in complex cases.
In 2022, Greg was asked to join a team of skilled federal prosecutors that formed the Special Counsel's Office. Greg was the coordinator for federal search warrants, wrote classified briefs filed by the Special Counsel's Office, and was a primary author of the Evidence Summary transmitted to the U.S. Attorney General. He led interviews of cabinet members, high-level federal and state government officials, and attorneys who represented the subjects of the investigation. Greg also litigated extensively on issues related to executive privilege, attorney-client privilege, presidential immunity, the Classified Information Procedures Act, Rule 17(c) subpoenas, and non-disclosure orders, and secured one of the highest sanction schedules against a corporate witness in U.S. history.