Pierce & O'Neill, LLP
Business Law | Serving Houston, TX
346-741-7942Connect with a local Houston, Texas firm for experienced Business legal representation.
Details Attorney Jesse R. Pierce
Attorney Jack O’Neill
Attorney Wesley N. Harris
Attorney Mary P. Livingstone
Attorney John C. Schwambach, Jr.
Experience matters. Results delivered.
We bring decades of dedicated civil trial and appellate experience to the table, ensuring our clients receive exceptional advocacy when the stakes are highest. Headquartered in Houston, our firm is recognized nationally for mastering complex commercial and energy litigation in both state and federal courtrooms. We pride ourselves on blending deep industry knowledge with a strategic, results-driven approach that simplifies intricate legal disputes. For us, every case is an opportunity to protect our clients' vital business interests with the proven courtroom reputation they expect and deserve.
Contact us today if you need legal assistance with any of the following:
- Business & Commercial
- Environmental
- Toxic Torts
- Trademarks
Call 346-741-7942 today to arrange your initial consultation.
Attorney Jesse R. Pierce
Bar Admissions:
- Oklahoma
- Arkansas
- Pennsylvania
- Ohio
- Supreme Court of the United States
- Second Circuit Court of Appeals
- Fifth Circuit Court of Appeals
- Eighth Circuit Court of Appeals
- Tenth Circuit Court of Appeals
- United States District Court for the Southern, Northern, Eastern, and Western Districts of Texas
- United States Bankruptcy Court for the Southern, Northern, Eastern, and Western Districts of Texas
- United States District Court for the Eastern, Northern, and Westerns Districts of Oklahoma
Education:
- University of Texas Law School, Order of the Coif, 1974
- J.D., with honors
- Austin College, 1971
- B.A.
Professional Memberships and Achievements:
- Senior Fellow, Litigation Counsel of America
- American Board of Trial Advocates
- The Center for American and International Law – Oil & Gas Practice Committee
- Council of the Oil, Gas & Energy Resources Law Section of the State Bar of Texas
- State Bar of Texas
- State Bar of Oklahoma
- State Bar of Arkansas
- State Bar of Pennsylvania
- State Bar of Ohio
- American Bar Association
- Houston Bar Association
- Recognized in Chambers Spotlight Texas Guide for Litigation: General Commercial and Energy & Natural Resources, 2025-2026
- Recognized in Chambers USA for General Commercial Litigation and Oil & Gas Litigation, 2009-2026
- Recognized in Lawdragon’s® 500 Leading Litigators in America, 2022, 2024-2025
- Recognized in Lawdragon’s® 500 Leading Energy Lawyers, 2025
- Recognized among the “Houston Elite” in Energy Litigation by Legal 500, 2025
- Selected Lawyer of the Year, Oil & Gas Law – Houston, Best Lawyers, 2011
- Recognized in The Best Lawyers in America© as a leading practitioner in Commercial Litigation, Natural Resources Law – Litigation, and Oil & Gas Law – Litigation, 2008-2026
- Recognized in Texas Super Lawyers in the area of Business Litigation 2003–2026
- Selected Top 100 lawyers in the Houston region, Texas Super Lawyers 2008–2010, 2012-2016 and 2019
- Selected Top 100 lawyers in Texas 2008 and 2010, Texas Super Lawyers
- Recognized in Texas Super Lawyers Business Edition, as a leading practitioner in Litigation, 2011-2018
- Recognized in Texas Super Lawyers Corporate Counsel Edition, 2008-2010
- Selected Energy & Natural Resources Expert by Global Law Experts, 2013-2019
- Recognized in Lawdragon’s® 500, Leading Lawyers in America, Toxic Torts 2005, Commercial Litigation 2025
- Martindale-Hubbell® “AV Preeminent” Rating
- Order of the Coif, University of Texas Law School
Attorney Jack O’Neill
Bar Admissions:
- U.S. Supreme Court, 1996
- U.S. Court of Federal Claims
- U.S. Court of Appeals 5th Circuit
- U.S. Court of Appeals 11th Circuit
- Texas, 1972
- U.S. District Court Southern District of Texas
- U.S. District Court Northern District of Texas
- U.S. District Court Eastern District of Texas
- U.S. District Court Western District of Texas
- U.S. Bankruptcy Court Southern District of Texas
Education:
- University of Texas Law School
- J.D.
- University of Pennsylvania
- B.A
- cum laude
Professional Memberships and Achievements:
- State Bar of Texas Section of Litigation, Director, 1998 to 2000
- Houston Young Lawyers Association, Director, 1978 to 1979
- American Board of Trial Advocates, Member
- International Association of Defense Counsel, Member
- State Bar of Texas
- Texas Bar Foundation
- Recognized in Chambers Spotlight Texas Guide for Litigation: General Commercial and Energy & Natural Resources, 2025-2026
- Recognized in Chambers USA among the leading Commercial Litigation attorneys, 2024 – 2026
- Recognized in Lawdragon Hall of Fame, 2025
- Recognized in Lawdragon 500 Leading Litigators in America, 2022, 2024-2025
- Recognized in Lawdragon 500 Leading Lawyers in America, 2024-2025
- Recognized in Lawdragon 500 Leading Energy Lawyers, 2025
- Recognized among the “Houston Elite” in Energy Litigation by Legal 500, 2025
- Recognized in The Best Lawyers in America© as a leading practitioner in Commercial Litigation, Appellate Law, and Oil & Gas Law – Litigation (2014-2026)
- Selected for inclusion in Texas Super Lawyers, 2003-2018, 2025-2026
- Martindale-Hubbell® “AV” Rating
Attorney Wesley N. Harris
Bar Admissions:
- Texas, 1982
- United States Supreme Court
- U.S. Fifth Circuit Court of Appeals
- U.S. Tenth Circuit Court of Appeals
- U.S. District Court Northern District of Texas
- U.S. District Court District of Wyoming
Education:
- University of Texas School of Law
- J.D., with honors
- Reed College, National Merit Scholar
- B.A.
Professional Memberships and Achievements:
- State Bar of Texas
- American Bar Association
- Houston Bar Association
- Texas Bar Foundation, Life Member
Attorney Mary P. Livingstone
Bar Admissions:
- Texas, 2002
- U.S. District Court Southern District of Texas
- U.S. District Court Eastern District of Texas
- U.S. District Court Western District of Texas
Education:
- Tulane Law School
- J.D.
- cum laude
- University of Texas
- B.A.
Professional Memberships and Achievements:
- State Bar of Texas
- Houston Bar Association
- Recognized in Chambers Spotlight Texas Guide for Litigation: General Commercial and Energy & Natural Resources, 2025-2026
- Best Lawyers in America, 2025-2026
- Lawdragon 500 Leading Litigators in America, 2024-2025
Attorney John C. Schwambach, Jr.
Bar Admissions:
- Texas, 1991
- Fifth Circuit Court of Appeals
- United States District Courts for the Southern and Western Districts of Texas
Education:
- University of Texas Law School
- J.D.
- Yale University
- B.A.
Professional Memberships and Achievements:
- Recognized in Chambers Spotlight Texas Guide for Litigation: General Commercial and Energy & Natural Resources, 2025-2026
- Best Lawyers in America, 2024-2026
- Lawdragon 500 Leading Litigators in America, 2024-2025
Languages Spoken:
- English
- Spanish
Pierce & O'Neill, LLP Awards
AV Preeminent®: This elite award is granted to attorneys who have been recognized by their peers for their very high ethical standards, with an average peer review score of 4.5 or higher.
Super Lawyers Selectee: Super Lawyers® is a rating service of outstanding lawyers who have attained a high-degree of peer recognition and professional achievement. The top 5% of lawyers in each state are selected using a patented selection process that includes independent research, peer nominations, and peer evaluations.