Overview
As a seasoned litigator, Guillermo brings extensive experience to defending employers in a wide range of workplace disputes.
Guillermo defends employers against claims of wrongful termination, discrimination, and harassment across various protected categories, as well as retaliation and failure to accommodate. He also handles matters involving defamation, breach of contract, and misappropriation of trade secrets. His experience is particularly evident in his handling of wage-and-hour claims, including failure to pay overtime wages, off-the-clock work, meal and rest period violations, and misclassification issues. Guillermo's litigation practice spans defending employers in single and multi-plaintiff lawsuits, class actions, and claims under the Private Attorney General Act (PAGA), showcasing his ability to navigate complex legal terrain.
Guillermo also focuses on training and counseling in workplace-related legal matters. He regularly advises employers on the best practices to avoid employment-law claims, providing practical guidance and counsel and conducting training on harassment prevention, anti-bullying, and practical management tools.
Guillermo is dedicated to providing exceptional legal representation in California state court, federal court, arbitrations, administrative hearings (EEOC, California Civil Rights Department, DLSE, and EDD), and mediation. Beyond his legal work, Guillermo is passionate about community service and regularly volunteers at local community organizations and elementary schools to discuss the importance of higher education and the legal system, reflecting his commitment to making a positive impact both inside and outside the courtroom.
Honors & Recognition
- San Diego Super Lawyers®, "Super Lawyers" (2014-2025)
- San Diego Business Journal, "Leaders of Influence in Law" (2024-2025)
- San Diego Business Journal, "Latino Leaders of Influence" (2024-2025)
- San Diego Metro Magazine, “2020 Men of Influence” Recipient
- Latino Leaders Magazine, "Top Latino Lawyers in 2019"
- San Diego Business Journal, "Leaders in the Law Finalist, Employment Law" (2019-2020)
- San Diego La Raza Lawyers, "Attorney of the Year" (2019)
- Southern California, "Top Lawyers" (2014–2023)
About Me
Guillermo and his wife, Marina, have two spoiled kiddos, and one spoiled dog (Romeo). Guillermo’s hobbies include movies (favorites are “Cinema Paradiso,” “Talented Mr. Ripley” and “Nacho Libre”), triathlons, designing men’s suits and stuffing his face with San Diego’s diverse cuisine.
Experience
Representative Matters
- Complete defense verdict in arbitration on claims of age discrimination, age harassment, intentional infliction of emotional distress, and defamation
- Motion for Summary Judgment on claims of age discrimination, wrongful termination
- Motion to Dismiss in federal court on claims of wrongful termination and ERISA violations
- Motion for Summary Judgment in federal court on claims of disability discrimination, failure to accommodate, and failure to prevent discrimination
- Motion for Summary Judgment in state court on discrimination claims based on age, race, and disability
- Demurrer in state court to claims of defamation and invasion of privacy
- Motion for Summary Adjudication in state court on gender and disability claims
- Successful Opposition to Motion for Class Certification in federal court on rest period violations
- Successful Opposition to Motion for Class Certification in federal court on meal and rest period violations
Credentials
Education
University of San Francisco, School of Law
- J.D., 1999
University of California, San Diego
- B.A., Sociology, 1996
Languages
- Spanish
Media
News
Professional & Civic Associations
Civic
- Chicano Federation of San Diego County
- Board Member (2018 - present)
- Vice Chair
- Casa Cornelia, Pro Bono Attorney, Asylum Case
- Big Brothers Big Sisters of San Diego, Pro Bono Attorney
- Gompers Preparatory Academy, Speaker
- King Chavez Primary Academy, Speaker
Professional
- San Diego La Raza Lawyers Association
- Endorsements Committee Chair
- Mentorship Program Co-chair (2010-present)
- Vice President (2018)
- Board Member (2016-2018)
- Hispanic National Bar Association, Employment Law Section Co-Chair (2016-2017)
Services
Industries
Admissions
- California, 2000
- U.S. District Court - CA - C.D., E.D., N.D., S.D.
"Build something you love with people you love."
Robert Lewis


