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Glennon represents public and private clients in a variety of commercial, technology and e-commerce-related matters.

He regularly advises clients on company-critical litigation and provides strategic advice to in-house counsel and senior management in crisis management, commercial contracting, credit transactions, regulatory compliance, product safety and litigation avoidance. As a result, he has a breadth of knowledge and experience not often found with other attorneys.

Glennon’s two decades in the practice of law involves an ever-widening range of technologies, products and services, including consumer products, financial services, industrial equipment, marketing technology, pharmaceuticals and telecommunications. He frequently works with manufacturing and technology companies, as well as financial institutions and other clients. A persuasive advocate, Glennon has delivered winning arguments in state and federal courts at the trial and appellate levels, as well as in arbitration and bankruptcy proceedings and before administrative agencies.

Clients seek his advice in commercial disputes, class action lawsuits, product liability defense, contractual claims, intellectual property, licensing, and regulatory compliance. He also assists clients with internal investigations and counsels companies regarding efforts to protect intellectual property, reduce litigation, comply with regulatory requirements and respond to subpoenas, civil investigative demands, and other inquiries from government agencies, including the Department of Justice, state attorneys general, as well as federal and state agencies. Glennon also advises senior management regarding branding initiatives and corporate governance. He handles cases as lead counsel but also collaborates as part of national trial teams in conjunction with other top U.S. law firms.

Glennon leads a client service team that handles commercial transactions for a global technology company and has negotiated a wide variety of agreements including technology development, supply, distribution, marketing, quality assurance and inventory financing agreements. He regularly assists clients with the drafting and negotiation of purchase and sales agreements, distributor agreements, sales representative agreements, license agreements, service agreements and other commercial agreements.

Glennon’s class action experience includes state and federal proceedings involving regulatory matters, advertising, marketing and billing practices, as well as defending numerous lawsuits filed under the Telephone Consumer Protection Act (TCPA), Missouri Merchandising Practices Act (MMPA), the Fair and Accurate Credit Transactions Act (FACTA), and state deceptive trade practice statutes. Glennon’s experience extends to shareholder litigation, including securities fraud, derivative actions and fiduciary duty claims against officers and directors. He works with lawyers across the country in a variety of multiple-firm cooperative approaches on behalf of clients, including the consolidation of more than 30 cases challenging a client's advertising and billing practices and the use of an All Writs Act injunction enjoining competing state class actions. Glennon has defended more than 15 separate TCPA claims.

Glennon’s work often involves state and federal regulations, as well as industry and consensus standards of the American National Standards Institute (ANSI), Underwriters Laboratories (UL), the National Fire Protection Association (NFPA) and many others. He has significant experience with investigations and lawsuits relating to fires, explosions and workplace fatalities. Glennon also assists clients with safety investigations, product recalls and other corrective actions. He advises clients regarding reporting requirements, submissions and complaint responses related to the Consumer Product Safety Commission (CPSC). He frequently works with product safety officers, engineers and outside consultants.

His experience includes advertising and marketing practices, credit transactions, patented biotechnology, counterfeit goods, process control systems, fiber optic cables, plastics  and injection molding equipment, remote control systems, wireless telephones, steam conditioning valves, emission controls, signal integrity products, batteries, motors, rotors and other motor components, pump systems, electrical switches, cryogenic products, control valves, water heater controls, appliance controls, ladders, manufactured housing, hot tubs, lighting fixtures, socket assemblies, heat tape, tires, tools, residential plumbing, commercial and industrial piping systems, natural gas, LP gas and odorant.

In the construction field, Glennon has handled contract default, supply/procurement, defective workmanship, delay, engineering and design defect, and mechanics’ lien/bond claims. His experience involves a variety of commercial, industrial and municipal projects, including one of the nation’s largest cement plants, a cogeneration power plant, one of the country’s largest mass transit systems and fiber optic cable relocation.

Before returning to private practice, Glennon was unit chief of the Consumer Protection Division of the Missouri Attorney General’s St. Louis office, where he directed the investigation and prosecution of violations of Missouri's securities, antitrust and consumer fraud statutes. He handled a broad array of issues, including electronic commerce, advertising, promotion and marketing, truth-in-lending (TILA), counterfeit goods and automobile leasing, as well as health and safety claims. He also represented Missouri in a variety of multistate investigations coordinated by the National Association of Attorneys General (NAAG) and in joint state/federal investigations with representatives of the Federal Trade Commission (FTC) and other state and federal agencies.




  • Martindale-Hubbell AV Preeminent


  • J.D., Saint Louis University School of Law
    • magna cum laude
    • Order of the Woolsack
    • American Jurisprudence Award, Torts
    • Dean Vincent C. Immel Scholarship
    • Judge V. James Ruddy Scholarship
    • Saint Louis University Law Journal, Managing Editor, Volume 36; Staff Editor, Volume 35
  • B.S.B.A., Saint Louis University
    • Economics
    • summa cum laude


  • Missouri
  • Illinois
  • U.S. Court of Appeals, Eighth Circuit
  • U.S. Court of Appeals, Eleventh Circuit
  • U.S. District Court, Central District of Illinois
  • U.S. District Court, Northern District of Illinois
  • U.S. District Court, Southern District of Illinois
  • U.S. District Court, Eastern District of Missouri
  • U.S. District Court, Western District of Missouri
  • U.S. District Court, Western District of Tennessee

Professional Associations and Memberships

  • The Bar Association of Metropolitan St. Louis
  • Defense Research Institute
  • The Missouri Bar
  • National Association of Manufacturers
  • Obtained summary judgments and/or dismissals for a variety of clients, including manufacturing and technology companies and service providers, in more than two dozen cases with no settlement payment.
  • Secured the dismissal of no less than six putative class action cases without any settlement payment.
  • Recovered more than $3.1 million for creditor/client, notwithstanding the filing of three separate bankruptcies, two by judgment debtors and a third by a partner in one of the debtors.
  • Obtained an order compelling the imaging and inspection of a plaintiff’s computers and electronic storage devices, requiring plaintiff to answer expedited discovery and providing other relief, all before the Rule 16 Scheduling Conference or the issuance of a case management order. The order also dismissed 20 counts filed against the client and all claims against the client’s president.  Ultimately, all claims were dismissed and the defendant/client was awarded over $350,000 in fees and costs.
  • Glennon has more than 35 reported decisions, including the following:

    • McLelland v. Ridge Tool Company and Emerson Electric Co., 350 F.Supp.3d 773 (W.D. Ark. 2018)
    • McLelland v. Ridge Tool Company and Emerson Electric Co., 342 F.Supp.3d 851 (W.D. Ark. 2018)
    • McLelland v. Ridge Tool Company and Emerson Electric Co., 340 F.Supp.3d 802 (W.D. Ark. 2018)
    • Tommy French v. CBL & Associates Properties, Inc., 2016 WL 7668500 (E.D.Tn.)(Dec. 16, 2016)
    • Margulis v. Generation Life Ins. Co., 91 F.Supp.3d 1165 (E.D.Mo. 2015)
    • St. Louis Heart Center, Inc. v. Forest Pharmaceuticals, 2013 WL 3988671, 2013 U.S. Dist. 109807 (E.D.Mo.) (July 17, 2013)
    • Harvey v. General Electric Company, 2012 WL 3733582 (clarified in favor of defendants by Dkt. No. 92) (E.D.Mo. 2012)
    • Heller v. HRB Tax Group, Inc., 287 F.R.D. 483 (E.D.Mo. 2012)
    • Heller v. HRB Tax Group Inc., 2011 WL 4834260 (E.D.Mo.) (October 11, 2011)
    • SLS Intern. Inc. v. AdOne Media Inc., 2007 WL 38677, RICO Bus. Disp. Guide 11,209 (E.D.Mo.) (January 4, 2007)
    • Trotter v. Mitchell, Maax Spas and Emerson Electric Co., 446 F. Supp. 2d 967 (W.D.Ar. 2006)
    • Arnold v. Louisville Ladder Group LLC, 2004 WL 5572033 (C.D.Ill.) (February 9, 2004)
    • Haynes v. Louisville Ladder Group LLC, 341 F. Supp. 2d 1064 (E.D.Ar. 2004)
    • Monsanto Co. v. Scruggs, 342 F. Supp. 2d 568 (N.D.Ms. 2004)
    • Monsanto Co. v. Scruggs, 342 F. Supp. 2d 584 (N.D.Ms. 2004)
    • Monsanto Co. v. Scruggs, 342 F. Supp. 2d 602 (N.D.Ms. 2004)
    • Monsanto Co. v. S.B.D. Inc., 2004 WL 4965468, 2004 Bankr. LEXIS 2468 (Bkrtcy.E.D.Mo.) (July 6, 2004)
    • Monsanto Co. v. Swann, 308 F. Supp. 2d 937 (E.D.Mo. 2003)
    • Monsanto Co. v. Scruggs, 249 F. Supp. 2d 746 (N.D.Ms. 2001)
Community Leadership
  • Saint Louis University School of Law, Alumni Class Agent
  • Saint Patrick's Day Parade Committee