Missouri Office:
2123 Marconi Ave.
St. Louis, MO 63110
(314) 656-6927

New York Office:
1180 Avenue of the Americas Suite 1920
New York, NY 10036
(212) 401-4008

Michigan Office:
1361 E. Big Beaver Rd.
Troy, MI 48083
(248) 457-9200


David Poirier

David Poirier

When it comes to complex commercial litigation, David Poirier has virtually done it all. Whether it be shareholder litigation and corporate governance matters, automotive supplier and OEM disputes, intellectual property and patent infringement, trade secret misappropriation and unfair competition, healthcare, environmental law, insurance coverage, professional malpractice defense, or a variety of business torts, Mr. Poirier has done it.

Mr. Poirier began his legal career at a national law firm in Chicago practicing in environmental law, a highly-regulated and technical area where client and attorney work together in turning problems into solutions. This has provided him a unique perspective in representing businesses and individuals in complex commercial litigation.

Indeed, early in the case, Mr. Poirier focuses on three things: understanding his client’s objectives, developing a strategy to achieve those objectives, and executing the plan—whether it be an early, negotiated resolution or a jury trial or anything in between. Key to achieving this are Mr. Poirier’s keen ability to simplify and manage complicated facts and legal issues along with his excellent writing and advocacy skills.

His impressive list of accomplishments include:

  • Real Estate Development Trial. Mr. Poirier first-chaired a trial in Chicago involving a $30 million real estate development and obtained a “to the dollar” judgment for all his client’s damages and attorneys’ fees.
  • Lender Liability Arbitration. Mr. Poirier first-chaired an arbitration filed by the borrower against the lender for claims of fraud, breach of contract, and various business torts. After Mr. Poirier’s cross-examination of the borrower, the arbitrator ended the arbitration hearing and dismissed the borrower’s claims.
  • Automotive Supplier Trial. Mr. Poirier was lead counsel for an automotive supplier against a competitor that misappropriated trade secrets. Due to his successful trial preparation and proper framing of the trial issues through discovery and pre-trial motions, Mr. Poirier’s client obtained a significant settlement.
  • Commercial Real Estate Commission Trial. Mr. Poirier second-chaired a two-week jury trial which resulted in his client, a national commercial real estate brokerage firm, obtaining a “to the dollar” verdict for the full value of its commission claim
  • Professional Malpractice Defense Trial. Mr. Poirier successfully second-chaired the defense of a high seven-figure attorney malpractice claim in an Illinois federal court jury trial. Mr. Poirier successfully managed and handled all day-to-day matters, and his preparation of fact and expert witnesses for trial was a key factor in his client obtaining a very favorable verdict.
  • Accountant Malpractice Defense Litigation. Mr. Poirier obtained a dismissal in federal court of a $5 million accountant malpractice claim against his client, a national accounting firm. Following that, Mr. Poirier preserved the trial court win by successfully arguing the case on appeal in the U.S. Sixth Circuit Court of Appeals.


J.D., University of Michigan Law School, 1991
B.A., Alma College, History and Business Administration, 1988, cum laude


  • State of Michigan
  • State of Illinois
  • Eastern District of Michigan
  • Northern District of Illinois
  • Sixth Circuit Court of Appeals

Publications and Presentations:

  • Co-author, Clean Water Act Enforcement Against Municipal Governments, American Bar Association, Tort and Insurance Practice Section, Aug. 10, 1992
  • Contributing author, The Lender’s Guide to Environmental Law: Risk and Liability, 1993
  • Co-author, The Current Status of Joint and Several Liability under CERCLA, Toxics Law Reporter, Sept. 13, 1995
  • Co-author, Important Lessons for Your Next Commission Agreement, Midwest Real Estate News, Aug. 2004
  • Presenter, Accountant Malpractice Claims: So You’re Getting Sued, Michigan Association of Certified Professional Accountants, Summer Management Information Show, June 2005
  • Presenter, How to Prepare for Cross-Examination, Michigan Association of Certified Professional Accountants, Litigation & Business Valuation Conference, June 2007
  • Presenter and panelist at several industry seminars regarding environmental litigation, accountant practice and potential liability, and sales commission litigation.