Who We Are:

  • Goren & Barreto, LLC consists of four attorneys, three paralegals, two secretaries/ receptionists, and an office manager:


David Goren is the senior attorney in the Office. He received a Juris Doctorate from the University of Maryland Law School in 1973 and a Master's Degree in Teaching Clinical Legal Education from the Antioch School of Law in 1978. He has taught Immigration and Nationality Law at several area law schools and has given numerous community presentations on the rights of aliens in the United States.

Mr. Goren has represented aliens and U.S. citizens in all areas of Immigration and Nationality Law in private practice since 1978. He has represented aliens before the Immigration and Nationality Service and the Immigration Courts in Washington, D.C.; Arlington, Virginia; Baltimore, Maryland; Philadelphia, Pennsylvania; New York, New York; Boston, Massachusetts; Buffalo, New York; Detroit, Michigan; Chicago, Illinois; Seattle, Washington; Oakdale, Louisiana; and Harlingen and Houston, Texas. He has corresponded extensively with U.S. Consulates around the world.

Mr. Goren has been a member of the American Immigration Lawyers Association for more than 30 years.

Andrew Barreto, Andrew has been a Partner at Goren & Barreto LLC since 2017. Andrew earned a J.D. from the University of Maryland School of Law in May of 2012. He is admitted to practice State Law in Maryland and Federal Immigration Law throughout the United States. He also has an undergraduate degree from Vanderbilt University. Andrew is the son of a Cuban refugee, and he is fluent in both Spanish and English. Originally from Maryland, he has also lived in Spain and Ecuador.

Prior to joining Goren & Barreto LLC, Andrew had several years of experience working in immigration law, first as a student attorney representing clients at the University of Maryland School of Law Immigration Clinic, and then as a legal intern in the Office of the Chief Counsel at U.S. Citizenship & Immigration Services (USCIS). While working at an international distribution company in Ecuador, he was involved in securing visas for company employees to perform business-related duties in the U.S.

Andrew has been a member of the American Immigration Lawyers Association since 2012.

Katherine Martinez, is a member of the Maryland Bar and a graduate of the University of Maryland School of Law.

Katherine also attended the Johns Hopkins University for undergraduate, where she earned a B.A in History. After college, Katherine worked at the House of Ruth Domestic Violence Legal Clinic, where she provided legal assistance to victims of domestic violence. While in law school, Katherine was a student attorney at the University of Maryland School of Law Immigration Clinic, where she represented clients in removal proceedings. She also interned at the Baltimore Immigration Courthouse.

Katherine is originally from Ecuador. She is a native Spanish speaker and fluent in English.

Zachary A. Kohn, joined Goren & Barreto LLC in 2019. He is admitted to practice in Maryland, the District of Columbia, U.S. District Court for the District of Maryland, the U.S. Court of Appeals for the Fourth Circuit, and the Supreme Court of the United States. Attorney Kohn graduated from the University of North Carolina School of Law. He also earned a Bachelor of Science degree at Boston University, where he graduated magna cum laude.

  Prior to joining the firm, Attorney Kohn worked in private practice for a full service immigration law firm for over five years. As the son of a Colombian immigrant, his personal connection to immigration has fueled his desire to provide other families with the opportunity to pursue the American Dream. He is fluent in Spanish and English. 


Walter Ortega


Originally from Peru, has over 18 years of experience as an immigration paralegal. He is fluent in Spanish and English.

Claus Ricardo Ortega


Immigration Paralegal, with many years of experience in Immigration Law, office administration and Internet. Previously he worked with Ayuda, an non-governmental organization. He is fluent in English and Spanish. He was born in Hawaii, Peru.

Serge Mweze


Serge Mweze, worked as human rights lawyer with local Non-for profit Organizations in the Democratic Republic of Congo. He attended the Ohio Northern University, and the American University Washington College of Law (AU WCL) and earned a J.D. and LLM in Democratic Governance and Rule of Law. While attending the AU WCL, he worked as a Student Attorney for the AU WCL’s Immigrant Justice Clinic where he represented Asylum seekers. He joined Goren and Barreto as a Legal Intern and then became a Paralegal. He is fluent in French and Swahili.

Helena Ammar

Secretary / Receptionist:

Originally from El Salvador, is responsible for administrative organization and billing. She is fluent in Spanish and English.

Michelle Miranda


Michelle is a loving, dedicated individual who is motivated for success and the betterment of immigrant policies.

Lilian Ramos



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