For over 35 years, Mr. Lassen has concentrated his legal practice in the field of workers compensation, handling cases not only though the Illinois Workers Compensation Commission, but through the Circuit and Appellate Courts, as well.

Mr. Lassen began his legal career as an Assistant Attorney General, subsequently working 17 years as partner in the Chicago firm of Koutsky, Boudreau, Lassen and Mason.  He has maintained his own practice in Wheaton since 1998.

Mr. Lassen has presented seminars to various groups and has guest lectured at John Marshall School of Law.  He is currently a member of the Du Page County Bar Association and the Illinois Workers Compensation Lawyers Association.

In addition, Mr. Lassen is associated with experienced and highly awarded personal injury counsel devoted to handling personal injury and wrongful death cases arising from automobile accidents, train and plane crashes, product liability, medical malpractice and construction site accidents.