Jack C. Brock
  • Senior Partner






Jack maintains an active trial practice having most recently tried jury cases involving commercial partnership interests, contracts, fiduciary duties, environmental releases, construction disputes, employment matters and professional negligence.

Jack leads the firm's Litigation section, specializing in complex civil litigation in the petrochemical and construction industries. His areas of emphasis include environmental, commercial litigation, construction and design related disputes and professional liability litigation.

He joined Mills Shirley in 1981 after eight years with the Galveston County District Attorney's Office, where Jack served as First Assistant and tried more than 200 cases ranging from capital murder to securities fraud. He continues an active trial practice focusing on significant and catastrophic injuries, as well as major commercial disputes. Clients often call upon him to lead internal investigations or in responding to accidents or disputes, in anticipation of litigation before it is filed.

Representative Experience

  • Defending major construction company against third-party claims for contribution for environmental clean-up under CERCLA
  • Defending partner against claims of breach of duty of loyalty and care
    Prosecuting claims of breach of contract and fraud in sale of business
  • Defending mass tort and property damage claims following accidental chemical release by a major petrochemical manufacturer
  • Prosecuting claims for defective design and construction of methanol plant on the Texas Gulf Coast
  • Defending engineer against claims of professional negligence in design of water treatment facility
  • Conducting internal investigation and reporting to corporate general counsel on repeated process upsets in the operations of a petrochemical plant
  • Defending international transportation company in accident involving multiple fatalities and catastrophic injuries
  • Prosecuting claims of breach of supply agreement between chemical manufacturers
  • Prosecuting claims of owner against contractor and design professionals for design and construction of major entertainment facility
  • Defending contractor against claims of negligent construction and delay of major commercial project
  • Prosecuting corporation claims against insurance broker for failure to secure coverage

Areas Of Practice

  • Commercial and Construction Litigation and Arbitration
  • Fiduciary Litigation
  • Litigation and Appeals
  • Business Litigation
  • Insurance Defense
  • Professional Malpractice
  • Environmental
  • Toxic Tort
  • Wrongful Death

Bar Admissions

  • Texas, 1972
  • U.S. District Court Southern District of Texas, 1981
  • U.S. District Court Eastern District of Texas, 1981
  • U.S. Court of Appeals 5th Circuit


  • University of Houston Law Center, Houston, Texas
    • J.D. - 1972
    • Honors: Order of the Barons
  • Lamar University, Beaumont, Texas
    • B.S. - 1968
    • Honors: With Honors
    • Honors: Phi Kappa Phi

Honors and Awards

  • Texas Super Lawyer, Business Litigation - 2017-2018
  • 2014 & 2015 List of Texas’ Top Rated Lawyers
  • Texas Super Lawyers
  • Texas Super Lawyer, Texas Monthly Magazine
  • Life Fellow, Texas Bar Foundation
  • Life Fellow, American Bar Association

Professional Associations and Memberships

  • American Bar Association, Member
  • Association of Defense Trial Attorneys, Member
  • Defense Research Institute, Member
  • International Association of Defense Counsel, Member
  • Texas Association of Defense Counsel
  • American Board of Trial Advocates
  • Galveston County Bar Association, Member
  • State Bar of Texas, Member
  • State Bar of Texas, Administration of Rules of Evidence Committee, 2007 to 2013
  • State Bar of Texas, Chairman, Grievance Committee for Galveston County, 1982 to 1986

Past Employment Positions

  • Galveston County, Assistant District Attorney, 1973 to 1981
  • Galveston County, Chief Assistant Criminal District Attorney, 1976 to 1981