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About William A Drennan

William Drennan has been an Assistant Professor at Southern Illinois University School of Law since 2005. He previously was an adjunct professor in the Graduate Tax Program at Washington University. Professor Drennan has LL.M. degress from Washington University in both Taxation and Intellectual Property. His areas of scholarship include federal income taxation, charities and charitable giving,and the intersection of federal income taxation and intellectual property. From 1985 through 2005 Professor Drennan practiced law full-time with Husch & Eppenberger, LLC (currently Husch, Blackwell, Sanders, LLP) in the tax and estate planning department, and the corporate department.


Present Faculty Member, Southern Illinois University Carbondale



Research Interests

taxation, trusts and estates, and charities and charitable giving

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Honors and Awards

  • American Law Institute Member
  • American College of Tax Counsel, Fellow
  • Co-Author, BNA Portfolio, Estate Planning for the Corporate Executive


  • Federal Income Taxation
  • Business Taxation
  • Trusts and Estates
  • Estate Planning
  • Charities and Charitable Giving

Taxation-Federal Income (4)

Corporations (1)

Taxation (2)