Thaddeus J. O’Sullivan

Thad represents and advises clients on a wide range of matters and has litigated cases in the state and federal courts in Washington and Idaho. He advises public and private sector clients on regulatory matters and contract drafting, compliance, and enforcement. Prior to law school, Thad worked in human resources in benefits enrollment and administration, payroll, recruiting, and health and safety compliance. In his free time, Thad enjoys spending time with his family, biking, and skiing.

  •  Bar of Idaho
  •  Bar of Washington
  •  Supreme Court of the United States
  •  United States Bankruptcy Court for the District of Idaho
  •  United States Court of Appeals for the Eighth Circuit
  •  United States Court of Appeals for the Ninth Circuit
  •  United States District Court for the District of Idaho
  •  United States District Court for the Eastern District of Washington
  •  United States District Court for the Western District of Washington

  • Gonzaga University School of Law (J.D., 2005, summa cum laude, Thomas More Scholar, Gonzaga Law Review: Notes/Comments Editor, C.A.L.I. Awards: Constitutional Law II, UCC 9, Corporations)
  • Morningside College (B.A., 1994)

  • FMLA Amendments to Affect Military Families and Airline Crews, The Advocate: Official Publication of the Idaho State Bar Association, February 2014
  • Statutory and Regulatory Violations in Maritime Personal Injury Litigation: What Counts, What Doesn’t, and What Does it Mean, 21 U.S.F. Mar. L.J. 41
Published Opinions

  • Endicott v. Icicle Seafoods, Inc., 167 Wn.2d 873 (2010), cert. denied June 21, 2010 (Docket No. 09-1393)
  • Duncan v. Alaska USA Credit Union, 148 Wn. App. 52 (2008)
Associations / Achievements

  • Selected as a Washington Super Lawyer by Washington Law & Politics magazine (2013, 2014, 2015)
  • Selected as Washington Super Lawyer Rising Star (2012)
  • Spokane County Bar Association
  • American Bar Association
  • Bikeworks: Board Member/Finance Committee Chairperson (2007-2009)

  • “Interlocal Cooperation Agreements and Joint Ventures Between Local Governments,” Spokane, WA, December 2016
  • “The Impacts of ‘Legal’ Pot and Improper Employment Documentation,” Spokane, WA, March 2015
  • “Your IP & the Departing Employee,” Spokane, WA, October 2013
  • “Human Resources Law: What You Need to Know,” Spokane, WA September 2013

  • Honorable Gerald W. Heaney, Circuit Judge, United States Court of Appeals for the Eighth Circuit
Client Alert