Susan Donjuan Lanzas

Susan Lanzas is an associate attorney at Diaz Law, where she brings a strong foundation in criminal defense, legal research, and motion practice to complex and high-stakes matters. She works directly alongside Hector Diaz to provide strategic and responsive representation to clients.

Susan earned her J.D. from the University of Arizona James E. Rogers College of Law, where she was recognized with both the John G. Hawkins Professionalism Award and the Dean’s Recognition for Leadership Award. She served as Editor in Chief of the Arizona Journal of International & Comparative Law, leading a team of more than 50 editors. She also earned a CALI Excellence for the Future Award in Public Powers & Mexico’s Electoral System and holds a Certificate in Mexican Public Law and Policy from Universidad Nacional Autónoma de México.

During law school, Susan gained valuable litigation experience through clinics and clerkships with the Federal Public Defender, Quarles & Brady LLP, and the Honorable Dean D. Pregerson of the U.S. District Court for the Central District of California. Prior to law school, Susan spent over a decade as a senior paralegal, managing litigation from intake through trial across civil litigation and criminal defense matters.

Fluent in Spanish, Susan ensures that clients receive clear and zealous advocacy throughout every stage of their case. She is proud to be part of a team that prioritizes early, aggressive advocacy and a personalized, client-first approach.