About Constantine Cannon

Constantine Cannon is an internationally recognized law firm, with offices in New York, Washington, DC, San Francisco and London, with expertise in antitrust and fraud. Over the past ten years, the firm has recovered for its clients more than $5 billion and tens of billions of dollars more in injunctive relief. The firm’s experience spans across multiple industries including healthcare, banking, pharmaceuticals, securities and commodities trading, insurance, high tech, the Internet and government contracting.

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About Our Team

Jason Enzler

Jason Enzler

Jason Enzler joined Constantine Cannon in 2008 as an associate in the firm’s Washington, DC office. His practice focuses on commercial litigation, antitrust, and representing whistleblowers under the False Claims Act and the Dodd-Frank/Wall Street Reform Act. Mr. Enzler earned a J.D., magna cum laude, from The Catholic University, Columbus School of Law in 2005 and his undergraduate degree from Iowa State University. Mr. Enzler is admitted to practice in the District of Columbia and in New York. To learn more about Mr. Enzler, click here.


Anne Hayes Hartman

Anne Hayes Hartman, a partner in the San Francisco office, has over 16 years of experience representing whistleblowers in qui tam lawsuits. She has pursued fraud claims in numerous industries, including defense, natural resources, commodity purchasing, health care, and finance. Ms. Hartman was part of the legal team that won a $225 million judgment after trial on behalf of several Los Angeles and California agencies against an electric utility for overcharging its government customers. Also a skilled litigator, Ms. Hartman has extensive complex commercial litigation and trial experience in state and federal courts as well as various ADR contexts. Ms. Hartman graduated from Columbia University and received both a J.D. and an M.P.P. from the University of California-Berkeley. To learn more about Ms. Hartman, click here.

Eric HavianEric R. Havian

Eric R. Havian is a partner in the San Francisco office of Constantine Cannon. He has extensive experience representing whistleblowers in qui tam lawsuits. He has also represented numerous local governments in False Claims Act matters, including the County of Los Angeles and the City of San Francisco. In 2010 California Lawyer Magazine named Mr. Havian a “California Lawyer of the Year.” In 2008 the National Law Journal named him as one of the Top 10 “Winning” Attorneys in the nation. He has been selected as one of the top 500 lawyers in America by Lawdragon and one of the top lawyers in Northern California by Superlawyers from 2005 through 2014. He was recently named to “Who’s Who in America” for 2014.

Mr. Havian was lead counsel for the whistleblower in a case that concluded in 2014 with the largest stand-alone kickback settlement ever, $400 million, against one of the largest dialysis companies in the country, DaVita. He also led a 2009 action that resulted in the largest settlement ever paid by a defense contractor in a whistleblower case, $325 million, against Northrop Grumman for selling defective components for government satellites. In 2007 he was co-lead counsel representing a whistleblower and several schools and other public agencies, in a trial that resulted in a $225 million verdict against an electric utility for overcharging its government customers. He also represented a whistleblower and dozens of public agencies as lead counsel in a 13-year litigation that resulted in the 2009 payment of $90 million by companies selling high-lead waterworks parts to California municipalities. Mr. Havian graduated cum laude in 1981 from Harvard Law School, where he was an oralist for the team that won the Ames Moot Court Competition. He was an Assistant United States Attorney in the Criminal Division of the U.S. Attorney’s Office in San Francisco from 1987 through 1994. Mr. Havian has taught fraud seminars at Stanford Law School and the University of California School of Law (Boalt Hall). To learn more about Mr. Havian, click here.

Marlene KouryMarlene Koury

Marlene Koury is an associate in the New York office of Constantine Cannon. Ms. Koury joined the firm in 2007 and concentrates her practice on antitrust litigation and counseling and representing whistleblowers under the False Claims Act and the Dodd-Frank/Wall Street Reform Act. Ms. Koury earned her J.D., cum laude, from Seattle University and her B.A. in Philosophy from the University of Washington. Ms. Koury is admitted to practice in New York. To learn more about Ms. Koury, click here.


Wayne T. Lamprey

Wayne T. Lamprey, a partner in the San Francisco office, specializes in representing whistleblowers. He has investigated and successfully prosecuted fraud for over 25 years, first as a federal white collar prosecutor, and for over 18 years representing whistleblowers. He has experience with schemes in a wide range of industries including health care, defense and government contracting, shipping, banking, securities and finance, energy, public resources, accounting, telecommunications, and more.

Mr. Lamprey’s experience has provided an effective basis for success for his clients. He has pursued and resolved numerous whistleblower actions, including two of the largest recoveries under the California False Claims Act. He was co-lead trial counsel in a whistleblower action involving energy accounting and related overcharges to public entities, and obtained a verdict for $225 million. In the area of public resources, Mr. Lamprey tried a whistleblower claim against lessees of public lands, resulting in another record recovery in California.

Mr. Lamprey’s skills are well recognized. A fellow of the American College of Trial Lawyers, Mr. Lamprey has tried criminal and civil False Claim actions. He is consistently listed as a SuperLawyer in California, and speaks and teaches regularly about whistleblower law and trial practice. To learn more about Mr. Lamprey, click here.

Gordon Scnhell

Gordon Schnell

Gordon Schnell has been a partner of Constantine Cannon since 1999, focusing on antitrust, fraud and whistleblower law. He practices before all levels of federal court and regularly represents clients on antitrust and fraud matters before the DOJ, FTC and other federal and state enforcement agencies. Mr. Schnell represents whistleblowers under the False Claims Act, Dodd-Frank/Wall Street Reform Act and the vast array of other whistleblower laws.

Mr. Schnell writes and speaks extensively on antitrust and fraud issues and is routinely interviewed and quoted in major business publications across the country including the Wall Street Journal, New York Times, Forbes, CNN, Bloomberg, USA Today, Newsweek and NPR. Mr. Schnell graduated from Columbia University School of Law in 1991 as a Stone Scholar, and from Tufts University in 1986, summa cum laude, with a degree in electrical engineering and physics. Mr. Schnell is a two-time recipient of the N. Hobbs Knight Prize Scholarship in Physics, is listed in the International Who’s Who of Competition Lawyers, and has been selected repeatedly as one of New York’s “Superlawyers” by Thomson Reuters. To learn more about Mr. Schnell, click here.

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