Jonathan K. Tycko received his law degree in 1992 from Columbia University Law School and earned a B.A. degree, with honors, in 1989 from The Johns Hopkins University.
After graduating law school, Mr. Tycko served as law clerk to Judge Alexander Harvey, II of the United States District Court for the District of Maryland and later joined the Washington, D.C. office of Gibson, Dunn & Crutcher LLP, one of the nation’s premier law firms. In April of 2002, Mr. Tycko became a founding partner of Tycko & Zavareei LLP.
Mr. Tycko has represented numerous qui tam whistleblowers, in areas including Medicare fraud, government contracts fraud, and tax fraud. In addition, with the 2010 passage of the Dodd-Frank Act, Mr. Tycko’s practice has expanded into representation of whistleblowers in the areas of securities and commodities, and violations of the Foreign Corrupt Practices Act.Continue to Full Bio
Hassan A. Zavareei earned his law degree from the University of California, Berkeley School of Law in 1995 and graduated cum laude from Duke University in 1990, with degrees in Comparative Area Studies and Russian.
After graduation from Boalt Hall, Mr. Zavareei joined the Washington, D.C. office of Gibson, Dunn & Crutcher LLP, one of the nation’s premier law firms. In April of 2002, Mr. Zavareei became a founding partner of Tycko & Zavareei LLP.
Mr. Zavareei has handled numerous trials and appeals in state and federal courts across the nation in a wide range of practice areas. In his civil rights practice, Mr. Zavareei represents individuals, groups of employees, and tenant associations in employment and fair housing litigation.Continue to Full Bio
Kristen Law Sagafi is a 2002 graduate of the University of California, Berkeley School of Law, where she served as articles editor for Ecology Law Quarterly and a student law clerk to the Hopi Appellate Court in Keams Canyon, Arizona. After graduating from law school, Ms. Sagafi joined the San Francisco office of Lieff Cabraser Heimann & Bernstein, LLP, one of the nation’s premier class action firms, where she represented plaintiffs’ in consumer fraud and defective products cases for more than a decade. During her tenure at Lieff Cabraser, Ms. Sagafi gained local and national recognition for her results on behalf of her consumer clients.Continue to Full Bio
Andrea R. Gold earned her law degree from the University of Michigan Law School in 2004 and graduated with high distinction from the University of Michigan Ross School of Business in 2001, concentrating her studies in Finance and Marketing.
After finishing law school, Ms. Gold worked as a Skadden fellow representing indigent battered women in dissolution of marriage, paternity, and order of protection matters.
Ms. Gold joined Tycko & Zavareei LLP in 2006. Since joining the firm, Ms. Gold has represented clients throughout the litigation process, including at trial and at the appellate level. Ms. Gold has extensive experience in class actions, unfair competition matters, employment litigation, and qui tam claims under the federal False Claims Act. Ms. Gold was named a partner of the firm in January of 2012.Continue to Full Bio
Anna C. Haac graduated cum laude from the University of Michigan Law School in 2006. In 2002, she graduated with a B.A. in political science with highest distinction from the Honors Program at the University of North Carolina at Chapel Hill.
After law school, Ms. Haac was a litigation associate at Covington & Burling LLP, one of the nation’s most prestigious defense-side law firms. During her time at Covington, she represented corporate clients in high stakes cases, focusing her practice on complex civil litigation, white collar defense work, and employment disputes.
Ms. Haac joined Tycko & Zavareei LLP in May 2012. Since joining the firm, Ms. Haac has represented individuals and companies in a variety of complex civil actions across a broad range of industries. Her practice has focused primarily on consumer protection litigation and whistleblower cases involving fraud against the federal government. In addition, Ms. Haac continues to represent clients in complex business disputes.Continue to Full Bio
Matthew W. Lanahan graduated cum laude from the University of Michigan Law School in 2014. While in law school, Mr. Lanahan was a contributing editor of the Michigan Law Review. Mr. Lanahan graduated summa cum laude, honors baccalaureate from Virginia Polytechnic Institute and State University with a BA in English and minors in History and Pop Culture. Mr. Lanahan is a member of Phi Beta Kappa.
Mr. Lanahan joined Tycko & Zavareei in 2019. Prior to joining Tycko & Zavareei, Mr. Lanahan practiced law in the Washington, D.C. office of a large international law firm. During his time at that large international law firm, Mr. Lanahan’s practice included work on large class actions, products liability matters, securities enforcement, false claims act matters, and complex commercial litigations. Mr. Lanahan also maintained a pro bono practice focused on large civil rights matters and landlord-tenant cases.
During law school, Mr. Lanahan participated in the federal appellate litigation clinic. Mr. Lanahan also interned for the Federal Defender’s office in Detroit. Mr. Lanahan is a member of the District of Columbia and Virginia state bars.Continue to Full Bio
Annick M. Persinger graduated magna cum laude as a member of the Order of the Coif from the University of California, Hastings College of the Law in 2010. While in law school, Ms. Persinger served as a member of Hastings Women’s Law Journal, and authored two published articles. In 2008, Ms. Persinger received an award for Best Oral Argument in the first year moot court competition. In 2007, Ms. Persinger graduated cum laude from the University of California, San Diego with a B.A. in Sociology, and minors in Law & Society and Psychology.Continue to Full Bio
V Chai Oliver Prentice graduated from Yale Law School in 2015. While in law school, Mr. Prentice served as an articles editor and managing editor of the Yale Human Rights and Development Law Journal. Mr. Prentice graduated summa cum laude from the George Washington University in 2009 with a B.A. in International Affairs and minors in Sociocultural Anthropology and German Language and Literature. He is a member of Phi Beta Kappa.
Mr. Prentice joined Tycko & Zavareei in 2019. Prior to joining the firm, Mr. Prentice clerked for the Honorable Marsha S. Berzon on the United States Court of Appeals for the Ninth Circuit. Mr. Prentice previously served as the Rockefeller Brothers Fund Fellow in Nonprofit Law at the Vera Institute of Justice. Mr. Prentice also previously worked as an associate at a boutique litigation firm in San Francisco. At that firm, he served as plaintiffs’ counsel in complex civil litigation matters with an emphasis on consumer protection and antitrust class actions. Mr. Prentice also worked on several qui tam lawsuits.
While attending Yale Law School, Mr. Prentice represented veterans in federal court class actions and administrative appeals as a law student intern at the Jerome N. Frank Legal Services Organization. He also served as President of Outlaws, Yale Law School’s LGBTQ student association, and as a filmmaker for Yale’s Visual Law Project. Mr. Prentice also served as a teaching assistant and writing instructor for Yale College courses on the U.S. criminal justice system and bioethics and the law.
Mr. Prentice is admitted to the State Bar of California and the bars of the United States District Courts for the Northern District of California, Central District of California, and Southern District of California, and the United States Court of Appeals for the Ninth Circuit.Continue to Full Bio
Katherine M. Aizpuru graduated cum laude from Harvard Law School in 2014. While in law school, Ms. Aizpuru held positions as Executive Submissions Editor of the Harvard Journal of Law & Gender and as a Board Member of Law Students for Reproductive Justice. Ms. Aizpuru graduated with High Honors from Swarthmore College in 2010 with a B.A. in Political Science and a minor in Chinese Language and Literature. She is a member of Phi Beta Kappa.
Ms. Aizpuru joined Tycko & Zavareei in 2017. Prior to joining the firm, Ms. Aizpuru clerked for the Honorable Theodore D. Chuang on the United States District Court for the District of Maryland and the Honorable Catharine F. Easterly on the District of Columbia Court of Appeals. Ms. Aizpuru has practiced law in the Washington, D.C. office of a large international law firm, where she worked on administrative proceedings and civil litigation matters, including several qui tam lawsuits. While at that firm, Ms. Aizpuru was recognized for her pro bono work on behalf of a domestic violence survivor, a client seeking Social Security disability benefits, and an international nonprofit organization.Continue to Full Bio
Maren I. Christensen joined Tycko & Zavareei in 2019. Prior to joining the firm, Ms. Christensen practiced law in the New York office of a large international firm. While at that firm, she worked on wide ranging civil litigation, international arbitration, and government enforcement investigations, as well as pro bono immigration matters. Ms. Christensen served for three years as a law clerk for the Honorable Martha Vazquez on the United States District Court for the District of New Mexico. She also previously worked as an associate at a boutique litigation firm in Oakland, where she served as plaintiffs’ counsel in employment law matters and qui tam lawsuits.Continue to Full Bio
Sarah C. Kohlhofer is a trial attorney who joined Tycko & Zavareei in 2019. A former prosecutor with both the United States Attorney’s Office for the District of Columbia and the Office of the Attorney General for the District of Columbia, Mrs. Kohlhofer has tried to verdict over 30 cases. Mrs. Kohlhofer also served for three years as a law clerk for the Honorable Barbara J. Rothstein on the United States District Court for the District of Columbia.
Mrs. Kohlhofer graduated from Boston College Law School, which awarded her the Frederic N. Halström prize for most outstanding performance in a national advocacy competition. During law school, Mrs. Kohlhofer worked for Northeast Legal Aid (formerly Neighborhood Legal Services), pursuing several class action lawsuits against major banks and mortgage servicers that had breached the terms of the U.S. Department of Treasury’s Home Affordable Modification Program. Mrs. Kohlhofer also worked as a student attorney for the Massachusetts Office of the Attorney General and the Suffolk County District Attorney, where she argued before the Massachusetts Appeals Court.
Earlier in her career, Mrs. Kohlhofer worked on the staff of U.S. Congresswoman Gabrielle Giffords. Mrs. Kohlhofer earned her B.A., Phi Beta Kappa and with high honors, from the College of Wooster. She was awarded the school’s top prize for a senior thesis relating to women’s, gender, and sexuality studies.
Mrs. Kohlhofer is admitted to practice in the District of Columbia and the Commonwealth of Massachusetts.Continue to Full Bio
Sabita J. Soneji is a Partner in Tycko & Zavareei’s Oakland office. She focuses her practice on consumer protection class actions and whistleblower litigation. Ms. Soneji has extensive experience in litigation and legal policy at both the federal and state level and a passion for fighting consumer fraud.
Ms. Soneji began that work during her time with the United States Department of Justice, as Senior Counsel to the Assistant Attorney General. In that role, she oversaw civil and criminal prosecution of various forms of financial fraud that arose in the wake of the 2008 recession. For that work, Ms. Soneji partnered with other federal agencies, state attorneys’ general, and consumer advocacy groups. Beyond that affirmative work, Ms. Soneji worked to defend various federal programs, including the Affordable Care Act in nationwide litigation.Continue to Full Bio
The purpose of this form is to provide basic information that our law firm will use to evaluate your potential qui tam case. We will treat all information you provide through this form as privileged and confidential. If you have any concerns about providing your information through this website, please feel free to call our Washington, D.C. office at (202) 973-0900 to provide your information by telephone, or send your information to our office at 1828 L Street, N.W., Suite 808, Washington, D.C. 20036.
Please note that, in general, we only handle cases in which a business or company has committed fraud on the government and the amount of the fraud is at least $1 million.Begin Your Confidential Case Evaluation