William "Bill" Treas is the managing partner and a founding member of Nielsen & Treas, LLC. He has extensive litigation experience in insurance defense, catastrophe litigation, commercial property and insurance coverage. In addition, Mr. Treas has been involved in mass joinder cases, False Claims Act suits, and has defended law enforcement in Section 1983 claims. He has represented numerous insurance companies participating in the National Flood Insurance Program across the country for over 20 years.

Mr. Treas is active in his community and donates his time and efforts to local organizations including Cub Scouts, Scouts of America, the Knights of Columbus, and coaching. He is an Eagle Scout and the proud father of two Eagle Scouts with one more to go. Mr. Treas is also a classic car enthusiast and enjoys hiking, camping, kayaking, backpacking, and tailgating at LSU football and baseball games.

For the past six years, Mr. Treas has been designated as one of the top lawyers by Louisiana Super Lawyers. He is admitted to practice in several courts including: the U.S. Supreme Court, U.S. Court of Appeals for the First Circuit, the Fourth Circuit, the Fifth Circuit, the Sixth Circuit, the Eighth Circuit, the Ninth Circuit, the Eleventh Circuit, as well as numerous U.S. District Courts across the country. Mr. Treas has served on the Board of Directors for the National Flood Association since 2019 and is currently the immediate Past-President.