Our size and experience enables us to perform the complex and sophisticated work our clients require.

William W. Thorsness

William W. Thorsness's Profile Image
(630) 571-1900

(630) 571-1042

William W. Thorsness is one of the co-founders and owners of the firm. He has over four (4) decades of extensive experience in successfully representing individuals, business owners, professionals, executives, retirees and their families with all matters relating to their estate planning affairs and the post-mortem settlement of estates.  Bill focuses on planning strategies to reduce clients’ exposure to federal and state estate taxation and the extra time and expense associated with probate court proceedings.

Bill was admitted to practice in the State of Illinois in 1973 and is licensed to practice in all the Illinois courts, including the United States District Court for the Northern District of Illinois. 

Bill is a member of the Illinois State Bar Association, serves as an Officer and Director of two substantial charitable foundations, is a former director of a metropolitan financial institution, is a long term member of Harvest Bible Chapter, a Life Loyal Member of the Sigma Chi Fraternity and a long term member and former Director of Ruth Lake Country Club.  He frequently speaks about estate planning to public, private and professional groups.

Practice Areas

  • Estate and Financial Planning
  • Estate Administration and Settlement
  • Probate
  • Trusts
  • Federal and State Estate Taxation
  • Federal Gift and Generation Skipping Taxation
  • Business Succession Planning
  • Asset Protection Planning


  • J.D., DePaul University, 1973
  • B.S. (Magna Cum Laude), Business Administration, Bradley University, 1969

Military Service

  • United States Army, Honorable Discharge, 1975

Proudly Celebrating

Over 35 Years in Practice

Over 35 Years of Practice