Skip to main content
Skip to main content

Saint Louis University School of Law Header Logo Center

Menu Search & Directory

William D. O'Neill, J.D.

Adjunct Professor

Courses Taught

Seminar: Trademark


William O'Neill received a Bachelor of Science in Journalism and Master of Science in Journalism from Northwestern University's Medill School of Journalism. He received his law degree, cum laude, from Saint Louis University, where he was Special Editor of the Saint Louis University Law Journal.

Practice Areas

William O'Neill is an attorney with the Senniger Powers law firm in St. Louis, where he concentrates on counseling and litigation in the areas of trademark, copyright and unfair competition law. Before becoming an attorney, O'Neill worked in the advertising agency business, first with J. Walter Thompson Company in Chicago and later as a Vice President of D'Arcy Masius Benton & Bowles in St. Louis. He helped develop and execute advertising and marketing strategies for clients including Anheuser-Busch, Inc., Brown Shoe Company, ConAgra Foods, Enterprise-Rent-A-Car, Kal Kan Pet Foods, Kraft Foods, M&M/Mars, Northwestern Mutual Life Insurance, Pillsbury, Procter & Gamble, and Trans World Airlines.