Tello  guillermo

Guillermo M. Tello


Los Angeles

1055 West Seventh Street
Suite 2400
Los Angeles, CA 90017
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Fax: +12134881178
B.A., University of La Verne, La Verne, California
J.D., magna cum laude, Western State University College of Law, Fullerton, California
State Bar Licenses
Court Admissions
U.S. District Ct., C.D. of California
U.S. District Ct., E.D. of California
U.S. District Ct., S.D. of California
U.S. District Ct., N.D. of California

Guillermo M. Tello


Guillermo Tello is a Member in Clark Hill's Labor & Employment practice group and Chair of the firm’s COVID-19 Employment Litigation Task Force. Mr. Tello is experienced in representing clients in both litigation and in providing advice and counsel. His litigation experience ranges from single plaintiff actions to class and representative actions. Matters handled by Mr. Tello include employment claims of wrongful termination, harassment, discrimination, wage and hour and prevailing wage disputes as well as business and commercial litigation, construction disputes, and public entity defense. His litigation experience includes obtaining full defense jury trial verdicts and arbitration awards.

Mr. Tello’s recent excellent results include:

  • Full defense award in single-plaintiff race discrimination and wrongful termination case filed against a national retail client.
  • Full defense jury verdict in single-plaintiff disability discrimination and wrongful termination case filed against a national food distributor client.
  • Full defense award in single-plaintiff sexual harassment and wrongful termination case filed against a healthcare provider client.

Mr. Tello also counsels clients on day-to-day California employment law issues, provides training and legal support to human resources, and assists clients in implementing new policies and procedure including alternative workweek schedules. Mr. Tello’s experience includes negotiating, drafting, and modifying a wide range of agreements/contracts, such as non-compete/non-disclosure/non-solicitation agreements, arbitration agreements, independent contractor service agreements, service agreements, construction contracts, and lease agreements.

Mr. Tello has also served as Adjunct Professor of Law at Western State College of Law in Irvine, California. He has taught Sales, a course devoted to Commercial Law and more specifically Article 2 of the Uniform Commercial Code, and an elective Business Law Ethics course.  

Mr. Tello is also actively involved in the local legal and business community. He serves as Deputy President for Region XVIII of the National Hispanic Bar Association. He has served as the CFO and Vice President of the Orange County Hispanic Bar Association and continues to serve on the Judicial Evaluations and Scholarships committees. Mr. Tello also actively participates in the Orange County Hispanic Chamber of Commerce.

Guillermo has been selected to the Southern California Super Lawyers Rising Stars list from 2017-2020.
Finalist, National Entertainment Law Moot Court Competition, Pepperdine School of Law
Best Submission, UCC Writing Competition, Business Law Section of the State Bar of California
Associate Member, National Association of Professional Employer Organization (2019-2020)
Deputy President for Region XVIII, National Hispanic Bar Association (2015–present)
O.C. Hispanic Chamber of Commerce (2016–present)
O.C. Hispanic Bar Association (2011-Present), served as Vice President, CFO, Director (2012–2016)
Member of Oversight Committee for La Habra City School District (2012–2014)