Mahyar Ghassemian

Top rated Construction Litigation attorney in Mission Viejo, California

Ghassemian Law Group, APC
Mahyar Ghassemian
Ghassemian Law Group, APC

Practice Areas: Construction Litigation, Business Litigation

Licensed in California since: 1999

Education: Western State University College of Law

Languages Spoken: English, French, Persian (Farsi), Spanish, Turkish

Selected to Super Lawyers: 2020 - 2023

Ghassemian Law Group, APC

27405 Puerta Real
Suite 250
Mission Viejo, CA 92691 Visit website


Mahyar Ghassemian is the managing attorney and founder of Ghassemian Law Group. She represents clients in Orange, San Diego, Los Angeles, Riverside, and San Bernardino Counties in business and construction litigation. She also advises businesses in preventative measures for business and construction law.
Ms. Ghassemian has a master’s degree in physics which has helped her in litigating technical construction matters. She earned her Juris Doctor from Western State University College of Law and has been practicing law in California since 1999. Since then she has represented some of the nation’s largest companies in litigation. She believes in cost-effective litigation strategies and boasts a very high settlement rate for her litigation cases.
Within the Orange County Bar Association ("OCBA"), Ms. Ghassemian has served in many roles. These include the Chairperson and member of the Board of the Solo/Small Firm Section, as well as mentor for newer attorneys. She routinely speaks for the Orange County Bar Association on Business and Construction issues and for various construction associations including Associated General Contractors (“AGC”), Southern California Contractors Association (“SCCA”) and National Association of Minority Contractors(“NAMC”). She is also the former president of Peter M. Elliott American Inn of Court and legal counsel to the board of National Association of Women Business Owners in Orange County (“NAWBO-OC”). She serves as outside general counsel to numerous companies including contracting, architectural, engineering, construction and various manufacturing and technological companies.
Ms. Ghassemian is a director on AGC's State Board of Directors for California, Chair of AGC's Associates Council, a member of the Legal Advisory Board of AGC and serves on the board of directors of the organization’s Orange County chapter. In 2014, she was named by the National Association of Women Business Owners in Orange County as a Remarkable Woman – a highly prestigious annual award given to only a few women.


Practice areas

Construction Litigation: Business, Business Litigation
  • 60% Construction Litigation: Business
  • 40% Business Litigation

First Admitted: 1999, California

Professional Webpage:

Bar/Professional Activity:
  • National Association of Women Business Owners, Leader Attorney Group: NAWBO-Esq. 
  • Iranian American Bar Association
  • Iranian American Society of Engineers & Architects 
  • National Association of Women Business Owners, 2016-2017 Legal Counsel for the Board 
  • Orange County Bar Association (OCBA): Mentor for New Lawyers 
  • Laguna Niguel Chamber of Commerce 
  • Provisors Network of Professional Advisors 
  • Orange County Bar Association (OCBA): Construction and Business Sections 
  • State Bar of California 
  • President Peter M. Elliott Inn of Court, 2017
  • Member Legal Advisory Board of AGC, 2019
  • Legal Counsel to the Board of Directors of National Association of Women Business Owners (NAWBO), Orange County, 2018
  • Member Board of Directors of AGC (Associated General Contractors) of California, Orange County chapter, 2019
  • 2015 Chairperson of the Solo/Small Firm Section of the Orange County Bar Association; 2016: Member of the Board of the OCBA Solo/Small Firm Section; 2015-2016 Vice President of the Peter M. Elliott Inn of Court; 2015-2016 Mentor with Orange County Bar Association; 2014: Speaker, Annual Program of the OCBA Solo/Small Firm Section; July 2014: Speaker, Law Partnerships and other Corporate Legal Entities for OCBA Solo/Small Firm Section, 2015
  • Four American Jurisprudence Awards, 1997-1999 
  • Orange County Bar Association(OCBA): Volunteer Recognition Award: 2013, 2014
  • Martindale – Hubbell, Bar Register of Preeminent Lawyers, 2009 
  • Every year, National Association of Women Business Owners in Orange County, chooses three women to honor for their business achievements.  In 2014, they awarded the honor for the Entrepreneur to Watch category to Mahyar Ghassemian for the success and excellence she had demonstrated in growing her business and achieving success in her law firm. This award is given to those who have been in business for themselves less than five years., Remarkable Women, Entrepreneur to Watch, National Association of Women Business Owners, Orange County CA, 2014
  • One of Orange County’s top attorneys by Orange County Metro and Orange Coast magazines in 2014 and 2015
Educational Background:
  • Masters' degree in Physics with emphasis in Quantum Mechanics and Quantum Electrodynamics
Scholarly Lectures/Writings:
  • Part of panel of speakers on the subject of setting up and thriving as a small law firm, Presenter, Seven ways to thrive as a small firm in today's economy, OCBA solo/small firm section, Attorneys, 2013
  • Education Workshop Speaker, Small Companies and Legal Issues, NAWBO Orange County, 2013 
  • Speaker, Peter M. Elliott Inn of Court, Cyberfuture in Legal Field, 2013 
  • Speaker, Peter M. Elliott Inn of Court, Ethical Issues in Client Representation, 2014 
  • Speaker, Peter M. Elliott Inn of Court, Bias and Diversity Issues in the legal Profession, 2015 
  • Speaker, The Business of Lawyering, O Orange County Bar Association (OCBA) – Solo/Small Firm Section, 2016 
  • Discussed new laws that affect the industry and how to stay compliant and away from trouble, Presenter, speaker, How to Minimize Legal Exposure for Your Company, AGC, Specialty Contractors, Construction, Contractors, Attorneys, Insurance Brokers, 2019
  • Presented on the new rules of professional conduct for attorneys with stress on bias issues, Presenter, speaker, New Rules of Professional Conduct on Bias, AGC, Legal Advisory Committee, Attorneys, 2018
  • Presentation to help contractors understand ways to get paid through Mechanics' Liens and Stop Notices, Present on the subject, Mechanics' Liens and Stop Notices, presenter, National Association of Minority Contractors, Construction, 2018
Pro bono/Community Service:
  • WHW, helping organization providing job support for disadvantaged individuals, 2018
Representative Clients:
  • General Counsel to nKlosures, Inc. Architectural firm, 2018
  • Classic Refrigeration SoCal Inc., General Counsel to firm specializing in the refrigeration industry, 2019
  • General Counsel to Wallace Design Group, Architectural Firm, 2019
Industry Groups:
  • Architects
  • Businesses
  • Construction Companies
  • Contractors
  • Developers
  • Engineers

Office location for Mahyar Ghassemian

27405 Puerta Real
Suite 250
Mission Viejo, CA 92691

Phone: 949-652-2756


4 Years Super Lawyers
  • Super Lawyers: 2020 - 2023

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