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314.889.7024
  • Education
    • J.D., magna cum laude, Notre Dame Law School, 2009
    • B.A., cum laude, University of Dallas, 2004
  • Court Admissions
    • U.S. District Court, Eastern District of Michigan, 2009
    • U.S. Court of Appeals, Sixth Circuit, 2011
    • U.S. District Court, Eastern District of Missouri, 2014
    • U.S. District Court, District of Colorado, 2014
    • U.S. District Court, Southern District of Illinois, 2015
    • U.S. Court of Appeals, Eighth Circuit, 2015

Britton St. Onge works hard to resolve his clients’ legal troubles using creative, tailored, and cost-effective solutions without losing focus on the client’s overall business objectives. Winning the battle achieves little without winning the war, and Britton recognizes there is much to be gained from careful thought and planning at the early stages of a new dispute, even before a lawsuit has been filed. He has experience with all stages of litigation, including first-chair trial experience (jury and bench), and enjoys crafting watertight legal and factual arguments that persuade the targeted audience of the force of his clients’ position. Britton’s legal experience before entering private practice exposed him to complex and nuanced jurisdictional and procedural disputes. That background gives him a deeper understanding of the federal judiciary, which he uses to his clients’ strategic advantage.

Britton has experience appearing before state and federal appellate courts, including with direct appeals after judgment, interlocutory appeals before judgment, and extraordinary-writ practice. Britton also has experience appearing before the American Arbitration Association.

Since joining Polsinelli, Britton has served clients in a variety of ways, including representing them in litigation involving:

  • Breach of contract and warranty disputes – particularly supply-chain disputes for manufacturers in various industries
  • Disputes arising from mergers and acquisitions
  • Defendant claims under the federal Fair Debt Collection Practices Act and related state laws
  • Trust and estate disputes
  • Property-related disputes
Before joining Polsinelli, Britton served as a law clerk to a federal appellate judge and, before that, to a federal trial judge. His background working closely with judges gives him a unique insight into the judicial decision-making process and allows him to better address the clients' specific needs.

Representative Litigations:

  • Representing pharmaceutical repackaging company in multi-district litigation involving alleged contamination of repackaged products.
  • Defended online security firm against claims that its email practices violated state law; defended favorable judgment on appeal.
  • Represented non-profit in negotiating for the release of obligations with hotels and convention centers in light of COVID-19 pandemic.
  • Represent various companies in their efforts to collect payment from vendors.
  • Secured a defense verdict following bench trial in a case asserting client’s personal liability on a contract between two companies.
  • Represented national religious denomination in dispute over ownership of real estate used by local church.
  • Represented bank in multiple efforts to obtain repayment on notes and personal guaranties purchased from the FDIC after the originating bank failed.
  • Represented retail construction company in post-closing acquisition dispute with buyer
  • Represented cancer treatment center in contract action involving services provided in clinical drug trials.
  • In action involving contract for development of land in St. Louis, successfully obtained an order transferring the action from federal court in St. Louis to a federal court in California, where client resides.
  • Represented limestone mining company in efforts to obtain mining permit from state environmental regulators, including litigation that followed after the permit was issued.
  • Successfully opposed challenge to significant arbitration award based on late service of the challenge, thereby saving client the expense of opposing the challenge on the merits.
  • Secured dismissal of trademark action on grounds that the court could not exercise personal jurisdiction over out-of-state defendant consistent with the U.S. Constitution.
  • Represented investment banking firm in dispute over fee due upon the successful sale of a business to strategic buyer.

Representative Appellate Matters:

  • Representing trustee in defense of the entry of summary judgment and a substantial award of legal fees.
  • Represented educational institution in interlocutory appeal addressing the potential for institution’s liability under state false claims act.
  • Represented national paint manufacturer before the Missouri Supreme Court in a successful challenge to personal jurisdiction based on use of a website.
  • Principal author of two amicus briefs filed with the U.S. Supreme Court in cases asking what the appropriate elements are for a claim of First-Amendment retaliatory arrest.
  • Assisted in drafting amicus brief filed with the U.S. Supreme Court in case addressing the intersection of the freedom of speech and the authority of the police to keep the peace.

Other Significant Matters:

  • Represented before a jury an individual charged with multiple crimes under state law.
  • Represented state prisoner who sued doctors for violating his constitutional right to necessary medical treatment.