Martin Garbus has a diverse practice that consists of individuals and companies involved in politics, media, entertainment and the arts. His courtroom skills have earned him a distinguished reputation as a trial lawyer.

Martin is experienced in every aspect of litigation and trial, from jury selection to cross-examination to summation. He has argued cases throughout the country involving constitutional, criminal, copyright and intellectual property law. He has appeared before the United States Supreme Court, as well as trial and appellate courts throughout the United States. He has argued and written briefs that have been submitted to the United States Supreme Court; a number of which have resulted in changes in the law on a nationwide basis, including one described by Justice William Brennan as "probably the most important due process case in the Twentieth Century." An international observer in foreign elections, he was selected by President Jimmy Carter to observe and report on the elections in Venezuela and Nicaragua. Martin also participated in drafting several constitutions and foreign laws, including the Czechoslovak constitution. He also has been involved in prisoner exchange negotiations between governments. He is the author of six books and over 30 articles in The New York Times, The Washington Post and The Los Angeles Times. Martin is featured in Shouting Fire, an award-winning documentary film about his life and career. He received the Fulbright Award for his work on International Human Rights in 2010. In 2014, University College Dublin's' Literary and Historical Society honored Martin with the James Joyce Award for Excellence in Law, which is also the same year Trinity College awarded him for his human rights and free speech work.

Martin has also taught trial practice at Yale Law School and Constitutional law at Columbia. He has also taught classes in Beijing, China, and Prague, Czech Republic. He has lived and practiced in China and Italy as well as the United States. He authored six books and numerous articles that have appeared in the New York Times, the Washington Post, the Los Angeles Times and numerous legal publications.

Martin has given many speeches on various aspects of law before Bar Associations, corporations, law schools and on CBS, NBC, ABC, CNN and other television and radio networks. Martin Garbus’ devotion to ethics, justice, free speech and the law has garnered enormous respect within the legal community, commercial and corporate sectors, and beyond. His numerous honors include designation in Who’s Who in America, a Profile in the New York Times, inclusion in Who’s Who in Best Lawyers in America, awards from his law school and college and praise from his numerous high-profile clients.

The Guardian called Martin "one of the world’s finest trial lawyers" and the "founding partner of one of America’s most prestigious law firms." In 2007, Business Week called him "legendary", "a ferocious lawyer who has received numerous media citations as one of America’s leading trial lawyers" and a "ferocious litigator." Time Magazine named him "legendary, one of the best trial lawyers in the country." Fortune Magazine called him, "One of the nation's premier First Amendment attorneys", and "legendary." Reuters called him a "famed lawyer" while other media have called him "America's most prominent First Amendment lawyer" with an "extraordinarily diverse practice" and "one of the country's top ten litigators." Super Lawyers Magazine designated him as a Super lawyer. New York Magazine and Los Angeles Magazine have named him both as one of America’s best trial lawyers, and one of America’s best intellectual property lawyers.