Tristan represents individuals and companies in complex business litigation. He has handled matters in state and federal courts as well as various administrative boards. His cases have included contract disputes, claims of breach of fiduciary duty, non-solicitation and non-compete agreements, fraud, and civil claims under the RICO statute. Tristan has also defended attorneys against ethical charges brought by the Office of Bar Counsel, and represented a variety of professionals facing malpractice suits. He has also represented contractors and land owners in disputes involving real estate, and handled landlord/tenant disputes.

Tristan also has experience as a criminal defense attorney at the trial and appellate level. In one recent case, for example, he successfully represented a group of defendants charged with disturbing the peace, keeping a noisy house, and hosting gatherings where individuals under 21 were served alcohol.

After law school Tristan clerked for Judge Gustavo A. Gelpí of the United States District Court in Puerto Rico. He has extended family and many professional connections in Puerto Rico, and is well situated to assist parties bringing or defending suits in federal court in Puerto Rico.