Marcos G. Ronquillo

Dallas, TX
Managing Partner, Dallas Office

Marcos G. Ronquillo serves as the managing partner of the firm's Dallas office and chair of the international practice. He has over 30 years of trial experience representing governmental agencies, such as the Dallas Independent School District and the Federal Deposit Insurance Corporation as well as Fortune 500 companies in high-profile controversies where public policy and social concerns collide in the courtroom.

Mr. Ronquillo is a past recipient of the State Bar of Texas Presidents’ Special Citation Award and Outstanding Lawyer of the Year Award from the Texas Mexican Bar Association. He was named to the 2013 list of the Best Lawyers in America.

Mr. Ronquillo has been awarded the national Spirit of Excellence Award by the American Bar Association, National Commission on Minority Lawyers. He has been recognized nationally as an outstanding lawyer by the American Immigration Lawyers Association, Dallas Business Journal, Ernst & Young, Texas Diversity Council and Texas Lawyer. He has also been honored by Texas Monthly and Super Lawyer magazines and listed as a Texas “Super Lawyer” from 2003 through 2012. In addition, Super Lawyers has named him to the list of the top 100 lawyers in the Dallas/Fort Worth area.

He is the former President of the Dallas Mexican American Bar Association and former Chairman of the Dallas Hispanic Chamber of Commerce. He is the former National Chairman of the University of Notre Dame, Hispanic Alumni Association and currently serves on the Board of Advisors of George Washington University Law School.

He was honored in 2011 by Hispanic Business Magazine as one of the “100 Most Influential Hispanics” in the United States, and by Latino Leaders Magazine with its prestigious “Maestro Award for Leadership.” He has served on numerous boards and commissions including the Dallas Museum of Art, Dallas Area Rapid Transit Authority (DART), Children’s Medical Center and JPMorgan Chase to name a few. He currently serves as President of the Julian Samora Legacy Project and sits on the Board of the United States/Mexico Bi-National Chamber of Commerce.

  • The George Washington University Law School (J.D., 1979)
    • Dean Kramer Scholar
  • University of Notre Dame (B.A., 1975)
    •  Holy Cross Scholarship
Admissions to Practice
  • U.S. Supreme Court
  • All Texas state courts
  • U.S. District Courts for the Northern, Southern, and Eastern District of Texas
  • U.S. Courts of Appeals for the 5th Circuit
  • Supreme Court of Texas
  • Spanish
Representative Cases

    Commercial Litigation

  • Trial counsel to CEO of Fortune 500 international oil services and construction company in class action federal securities litigation under the Private Securities Exchange Act of 1934
  • Lead trial counsel in the successful pursuit in claims against officers and directors, law firms and accounting firms providing professional services to failed savings and loans throughout the states of Texas and California
  • Obtained total defense verdict on behalf of a major international restaurant chain in defense of a multiple million dollar oral partnership dispute and breach of contact claim
  • Lead trial counsel to Fortune 500 telecommunications company in contract dispute on use of technologies
  • Trial counsel in federal court for Fortune 500 company in class action securities litigation and SEC Investigations
  • Trial counsel to foreign investor in successful prosecution of claims arising from stock investment in an international technology company


  • Chief outside counsel to transit authority in defense of $60 million property damage claim
  • Successful representation Fortune 500 industrial construction company in prosecution of claims arising from the construction of a combined-cycle power plant
  • Trial counsel to major urban school district regarding construction claims arising from a billion dollar bond issue

    Labor and Employment

  • Lead trial counsel to major transit authority in successful defense of highly publicized whistle blower claim brought by a former employee
  • Lead trial counsel to major airline in defense of civil rights claim and complaint by federal government
  • Counsel to a major city in defense of personnel and civil rights claims
  • Counsel to a major utility and energy company regarding major personnel re-organization and related employment claims
  • Counsel to the superintendent of a major urban school district regarding personnel re-organization and development of personnel policies
  • Counsel to the police chief of a major urban city regarding selection and promotion of executive personnel
  • Lead trial counsel to a major utility company regarding defense of employment and tort related claims

   Civil Litigation

  • Defend an high-profile attorney against claims of professional negligence, malpractice, breach of fiduciary duty, and fraud
  • Represent a trustee against claims of fraud and breach of fiduciary duty in federal litigation in a substantial family trust
  • Obtained a total defense verdict on behalf of a telephone company in a $20 million wrongful death claim
  • Counsel to a major newspaper and publishing company in successful defense of multi-million dollar personal injury claim
  • Counsel to a public hospital district in successful defense of personal injury claim
  • Trial counsel to a major utility and energy company regarding employment and tort related claims

    Public Law

  • Served as lead trial counsel and obtained a declaration of unitary status and removal of a 33-year old desegregation order for one of the largest metropolitan school districts in the U.S. with a majority-minority student population
  • Defend a major urban school district against federal claims for violations of the First Amendment, Section 1983, Title VII of the Civil Rights Act of 1964 and claims of retaliation and additional state employment claims
  • Represent a major suburban school district in the evaluation of its compliance with federal civil rights regulation and court-mandated desegregation orders
  • Lead trial counsel defending a major metropolitan school district against national civil rights advocacy organization alleging segregation and other constitutional and statutory violations and obtain a judgment of no liability on the part of the district
  • Trial counsel to a major international airport in successful defense of over 200 inverse condemnation claims
  • Represented a major Southern California airport in conduct of availability and disparity study regarding its MBE programs and goals
  • Lead trial counsel defending a major urban school district against a former employee's claims of violations of the First Amendment, Title VII of the Civil Rights Act of 1964 and retaliation
  • Successfully negotiated contracts for a national newspaper chain with major metropolitan airport and city council


  • Served as trial counsel to a major utility company regarding a breach of contract claim in federal court
  • Served as trial counsel to a major independent producer of natural gas in the U.S. regarding breach of contract and civil rights claims in federal court.
  • Represented energy companies and joint venturers in pursuit of claims arising from the development and drilling of land on the Barnett Shale
  • Defended a trustee and realty company in commercial and fiduciary litigation relating to a joint venture on the Barnett Shale
  • Successful representation of a major energy company in the preparation of a minority and women owned business enterprise development program to obtain a competitively bid government contract for the largest oil and gas lease in Texas history

    International Practice

  • Lead trial counsel to World Cup, Inc. in an international contract dispute
  • Counsel to a project principal relating to development of an integrated natural gas import and power generation facility in El Salvador
  • Successfully defended a large international luxury hotel chain against an high-profile plaintiffs' attorney with multi-million dollar claims for wrongful death
  • Represented an international textile manufacturer in the successful settlement of trade dispute
  • Successfully represented a worldwide luxury international hotel chain in multi-million dollar premises liability claims for wrongful death and survivorship actions and obtain favorable settlement
  • Represented an international plastics manufacturer in pursuit of contract claims
  • Counsel to Wall Street investment banking firms regarding energy, construction, and infrastructure projects in Latin America, The Caribbean, and Puerto Rico
  • Counsel to a major U.S.-based foundation and philanthropic trust with assets in the U.S. and Mexico City
  • Counsel to an executrix in probate litigation matters involving Mexican charitable organizations and philanthropic activities in Acapulco, Mexico
  • Counsel to a major U.S. newspaper and publisher for employment and labor law related matters of employees in Mexico City
  • Counsel to a Canadian-based manufacturing company in distribution of products and services to municipal transit authorities in the U.S.

    Minority Business Enterprise

  • Served as outside counsel to Texas cities, school districts, transit authorities, and other governmental and inter-governmental organizations in development, compliance, and evaluation of Disadvantage Business Enterprise(“DBE”) and Minority Business Enterprise (“MBE”) programs
  • Serve as outside counsel to north Texas certification agency and advise on issues affecting the certification of minority and women-owned businesses
  • Represent north Texas governmental agency in multi-jurisdictional availability and disparity study to assess whether there is evidence of marketplace discrimination against minority women and disadvantaged-owned business enterprises
  • Created an inter-local agreement establishing a North Texas non-profit agency that provides governmental certification of minority and women owned businesses
  • Prepared minority and women owned business enterprise development program for major energy company and successfully obtained a competitively bid government contract for the largest oil and gas lease in North Texas history
  • Outside counsel for major Texas city to audit the City’s minority and women owned business programs and certification procedures
  • Outside counsel for regional airport authority tasked with developing a disparity study for the support of race conscience goals in government contracting

Municipal Finance

  • Bond counsel to local and state governmental authorities
  • Underwriters counsel to Wall Street investment banking firms
  • 'Red Book' Listed Municipal Bond Buyers Guide


  • Counsel to major airline, construction, manufacturing and energy companies on immigration and nationality law issues


  • Represent a major industrial construction company in international arbitration before the International Centre for Dispute Resolution in pursuit of claims relating to the engineering and construction of a combined-cycle poser plant
  • Lead counsel in thesuccessful arbitration of real estate dispute in Miami, Florida on behalf of Mexican client
Certification & Ratings
  • AV rated "Preeminent" by Martindale-Hubbell 
Honors and Awards
  • Selected for inclusion in The Best Lawyers in America 2013, commercial litigation
  • Selected to the list of Thomson Reuters' "Texas Super Lawyers" as published in Texas Monthly and Super Lawyers magazine, 2003-2011
  • Selected to the list of Thomson Reuters' "Top 100 Lawyers in Dallas/Fort Worth" as published in Texas Monthly and Super Lawyers magazine, 2011
  • Selected to Thomson Reuters' Texas Super Lawyers Blue Ribbon Panel, 2012
  • Dallas Business Journal, 2008 Defender of the Year Award
  • American Bar Association, Spirit of Excellence Award, National Commission on Minority Lawyers, 2000
  • State Bar of Texas, President's Special Citation Award, Outstanding Lawyer, 1988
  • Greater Dallas Hispanic Chamber of Commerce, Chairman's Leadership Award, 2006
  • National Diversity Council, "Champion of Diversity" award, 2012
  • Hispanic Business Magazine, 100 Most Influential Hispanics in the United States, 2011
  • Latino Leaders Magazine, Maestro Award for Leadership, 2011
  • Dallas Hispanic Bar Association, President's Award, 2009
  • "Inclusiveness Champion of the Year" Ernst & Young Celebration of Diversity, 2008
  • Legal Diversity Award, Texas Corporate Diversity Council, 2008
  • Resolution of Appreciation for Outstanding Community Leadership and Legal Representation, North Central Texas Regional Certification Agency, 2006
  • Resolution of Appreciation for Outstanding Service, JPMorgan Chase, Metroplex Region Community Advisory Council, 2004
  • Equal Access to Justice Award, The Legal Services of North Texas, 2002
  • Texas Minority Counsel Program, Leadership Award, 2002
  • "Quality Circle" Entrepreneur of Year Award, Greater Dallas Hispanic Chamber of Commerce, 1993
  • American Immigration Lawyer's Association, National Award, Outstanding Lawyer, 1990
  • Outstanding Lawyer of the Year, Texas Mexican American Bar Association, 1989 
Memberships & Affiliations
  • American Bar Association
  • American Immigration Lawyers Association
  • College of State Bar of Texas
  • State Bar of Texas
  • Texas Bar Foundation
  • U.S./Mexico Binational Chamber of Commerce, Board Member
  • Founding Director, University of North Texas at Dallas Foundation Board
  • JPMorgan Chase, Dallas Region Advisory Board
  • JPMorgan Chase, Metroplex Region Community Advisory Council
  • JPMorgan Chase, National Community Advisory Board
  • Children's Medical Center of Dallas, Board of Directors
  • Dallas Museum of Art, Board of Directors, (Former)
  • Dallas Area Rapid Transit Authority, Board of Directors (Former)
  • The Catholic Foundation, Advisory Council Member
  • Julian Samora Legacy Project Board, President
  • Texas Minority Counsel Program, State Bar of Texas, Founding Member
  • Congresswoman Eddie Bernice Johnson, 30th District of Texas, Hispanic Advisory Board
  • Parkland Foundation, Board of Directors
  • North Texas Public Broadcasting (KERA), Board of Directors
  • Southern Methodist University, Willis M. Tate Distinguished Lecture Series, Board of Directors
  • Dallas Independent School District, Law Magnet, Center for Public Service, Advisory Board Member
  • University of North Texas, College of Law, Board Member and Co-Chair (Founder)
  • State Bar of Texas, Committee on Immigration and Nationality Law, Former Chairman
  • Greater Dallas Chamber of Commerce, Board of Directors Member (Former)
  • Methodist Medical Center, Board of Trustees (Former)
  • Mexican American Legal Defense and Educational Fund, Board of Directors (Former)


Marcos G. Ronquillo
Voice: (214) 237-4314
Fax: (214) 237-4340
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