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Jonathan K. Tycko

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.

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Hassan A. Zavareei

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.

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Kristen Law Sagafi

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.

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Andrea R. Gold

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.

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Anna C. Haac

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.

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Annick M. Persinger

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.

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Katherine M. Aizpuru

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.

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Tanya S. Koshy

Tanya Koshy graduated from University of California, Berkeley School of Law in 2010. Ms. Koshy graduated from Wellesley College magna cum laude in 2005 with a Bachelor of Arts degree in Political Science and Africana studies.

Ms. Koshy joined Tycko & Zavareei in 2018. Prior to joining the firm, Ms. Koshy was a staff attorney at the Ninth Circuit Court of Appeals, where she reviewed civil appeals and presented her recommendations as to the disposition of those appeals to monthly panels of circuit judges. Through this position, she was exposed to a wide range of civil litigation matters and consumer protection issues. Prior to working at the Ninth Circuit, Ms. Koshy was a supervising staff attorney at the East Bay Community Law Center in Berkeley, California. While at the East Bay Community Law Center, she worked on administrative proceedings, civil litigation, and direct legal services aimed at removing systemic barriers to employment for people with criminal records. Ms. Koshy was also a clinical supervisor at the University of California, Berkeley School of Law and in that capacity, supervised and trained clinical law students and oversaw a weekly direct legal services clinic in Oakland, California. Prior to law school, Ms. Koshy worked as a paralegal at Neufeld Scheck and Brustin in New York City, a law firm focused on civil rights cases challenging wrongful convictions and police misconduct.

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Sabita J. Soneji

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.

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