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William Stuart Thomas

Construction and development Attorney at Saint Louis, MO

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About William

Learn William’s areas of practice.

William S. Thomas is one of the firm’s many experienced trial lawyers. His practice is diverse, with an emphasis in complex litigation. He has tried cases in a number of difficult venues, from the City of St. Louis, Missouri, to Madison and St. Clair Counties, in Illinois, and Federal Court in East St. Louis and St. Louis. He was lead trial counsel in one of the longest civil jury trials in St. Louis County history, which lasted 100 trial days. In addition to his trial practice, Bill is actively involved in a number of professional organizations. He is a former president of the Lawyers Association of St. Louis, the local trial bar. He is active in the Defense Research Institute, (DRI), serving on its Products Liability Committee, and that committee’s Building Products and Power Tool Specialized Litigation Groups, where he has spoken at DRI conferences. He is active in the DRI’s Construction Committee, and Professional Liability Committee, where he serves on their Design Professional Subcommittees. He has authored a number of articles for the DRI’s monthly publication, For the Defense. He is an extensive author and speaker on a number of topics from products liability to construction law issues.

Licensed for 28 years
State IL
Status Active and Authorized to Practice Law
Acquired 1995
Updated 01/06/2023
State MO
Status Good Standing, Active
Acquired 1994
Updated 01/01/2023

We have not found any instances of professional misconduct for this lawyer.

Contact William

Gausnell, O'Keefe & Thomas LLC
1717 Park Avenue
Saint Louis, MO, 63104


Not yet reviewed. Review William


  • Hourly Rates $ 200-250 per hour
Payment methods


AVVO RATING 10.0 (Superb)

Work Experience

  • Law Student Intern
  • St. Louis County Prosecutor's Office
  • 1993 - 1994
  • Legal Intern
  • United States Attorney's Office, Eastern District of Missouri
  • 1993 - 1993
  • Legal Intern
  • Circuit Court Of The City Of St. Louis, Hon. Richard Mehan
  • 1992 - 1993


  • Saint Louis University School of Law
  • JD
  • 1994
  • Notre Dame
  • Government, Public Service
  • 1991


  • Harmonie Group
  • Board of Directors
  • 2011 - 2016
  • Lawyers Association of St. Louis
  • President
  • 2008 - 2009

Languages Spoken

  • English

Honors and Awards

  • "Lawyer of the Year - Construction Law"
  • Best Lawyers
  • 2023
  • "Lawyer of the Year - Litigation - Construction"
  • Best Lawyers
  • 2022
  • Construction Law and Litigation
  • Best Lawyers in America (2019-2023)
  • 2019
  • Top 50 Lawyers in St. Louis
  • Super Lawyers
  • 2015
  • Super Lawyer - Construction Law
  • Missouri and Kansas Super Lawyers (2008, 2013 - 2021)
  • 2008
  • "Up and Coming Lawyer"
  • Missouri Lawyers Weekly
  • 2007
View all awards


  • Travelers Insurance Stamped, Sealed and Delivered
  • The Do’s and Don’ts of Document Retention - More Paper or Paper-Less?
  • 2014
  • DRI Defense Library Series, Construction Litigation Desk Reference: A State-By-State Compendium
  • Missouri Construction Law
  • 2010
  • Missouri Bar CLE Deskbook Series, Construction Law
  • Construction Contracts: Risk Shifting Devices
  • 2009
  • Missouri Bar CLE Deskbook Series, Professional Liability
  • Design Professional Liability
  • 2005
  • Missouri Lawyers Weekly
  • Professional Responsibility for Design Documents
  • 2000
  • Defense Counsel Journal
  • Defending Design Professionals: Is Contract Language an Adequate Shield?
  • 1997
View all publications

Speaking Engagements

  • Strafford Seminars Webinar
  • Defeating Reptilian Tactics in Construction Litigation
  • 2019
  • Hall & Company AE Resource Webinar
  • Document Retention For Design Professionals
  • 2017
  • Litigation and Claims Management Seminar: “Combating the Reptile Theory"
  • Defeating the Reptile During Depositions
  • 2017
  • Professional Development Seminars
  • Professional Liability of Engineers
  • 2017
  • Litigation and Claims Management Seminar
  • Managing Risk Through Limitation of Liability Clauses
  • 2016
  • Half Moon Education Seminars, Engineering Law and Ethics
  • Handling Ethical Issues in Professional Engineering Practice
  • 2016
  • Webinar
  • Claims Against Design Professionals – 5 Things to Do and 5 Things Not to Do
  • 2015
  • Law of Construction Defects and Failures, Seminar
  • Liability for Construction Defects and Failures
  • 2014
  • DRI Product Liability Conference
  • Liability of Product Manufacturers Complying with Performance Specifications in Design/Build Projects – Liability for ‘Delegated Design’
  • 2014
  • Webinar
  • Understanding Claim Exposures and Contractual Risk Transfer
  • 2013
  • Professional Development Seminars
  • Professional Liability of Engineers and the Standard of Care,”
  • 2013
  • Mini Law School for the Public, Missouri Bar Speaker Series
  • Professional Responsibility: The Responsibilities Design Professionals Have to Protect their Clients and the Public
  • 2013
  • Hall & Company AE Resource Webinar
  • Understanding Claim Exposures and Contractual Risk Transfer
  • 2013
  • Minimizing Engineering Liability Exposure
  • Understanding Liability Under Contract
  • 2012
  • Willis 17th Annual Construction Risk Management Conference
  • Understanding Claim Exposures and Contractual Risk Transfer
  • 2011
  • Harmonie Regional Construction Conference
  • Indemnity, Insurance and Additional Insured Status “ A Loss Prevention Primer
  • 2011
  • St. Louis Chapter of ASHRAE
  • Architect & Engineer Liability for Indoor Air Quality/Mold
  • 2010
  • Harmonie Regional Construction Conference
  • Multi-Party Claims and Third Party Practice in the Construction Context
  • 2010
  • BAMSL Bench and Bar Conference
  • Handling the High Profile Case in the Information Age
  • 2010
  • Construction Contracts A-Z
  • Ethical Considerations in Construction Contracting
  • 2010
  • Lloyds of London International Seminar
  • Jury Leanings When Times are Lean: An Assessment of Juror Decision-Making and Trends in Damage Awards Amidst the Worst Economic Downturn in Decades
  • 2009
  • Legal Issues for Missouri Design Professional
  • Complying with Missouri Rules and Regulations on the Practice of Professional Architecture and Engineering
  • 2008
  • Legal Issues for Missouri Design Professionals
  • Professional Conduct and the Standard of Care
  • 2007
  • Harmonie-China International Law Symposium
  • Product Liability: Depositions of Parties, Corporate Representatives, and Mediation Strategies
  • 2006
View all speaking engagements

Attorney endorsements

Received (3)
Given (1)
Endorse William
Construction and development Attorney | Aug 14
Relationship: Friend
"I worked with Bill for several years in St. Louis. He is one of the most hard-working, competitive and energetic lawyers I know. I endorse Bill without reservation."
Unknown Attorney | Jun 23
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Construction and development Attorney | Feb 03
Relationship: Co-worker
"I endorse this lawyer."

Avvo Contributions

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Saint Louis Construction and development Lawyer William Stuart Thomas
William Stuart Thomas
Construction and development Attorney
Saint Louis, MO
Licensed for 28 years