Frank R. Siderius

Frank R. SideriusA partner in Siderius Lonergan & Martin, Frank Siderius has been an advisor and litigator for more than 30 years. In addition to an active practice advising businesses and financial institutions, Frank has tried cases in state and federal courts at trial and appellate levels. He has handled cases involving business disputes, creditor’s rights, personal injury, wrongful death, real estate, insurance defense, and probate and estate issues.

Frank advises financial institutions and credit unions on all banking issues, including regulatory compliance. He has expertise on financial transactions, creditor's rights, real estate, business formation and transactions and estate planning.

Frank joined Siderius Lonergan & Martin in 1977. He has been recognized as a Washington Super Lawyer by Washington Law & Politics magazine, and he is committed to providing pro bono legal services.

Areas of Practice

  • General civil litigation, banking, commercial litigation, real estate, personal injury, estate planning, trusts and probate.

Bar Admissions

  • King County.
  • State of Washington.
  • U.S. District Court, Western District of Washington.
  • U.S. District Court, Eastern District of Washington.
  • U.S. Supreme Court.

Other Professional Associations

  • Washington State Trial Lawyers Association.

Notable published opinions

  • Schlager v. Bellport, 118 Wn.App. 536 (2003).
  • Bogle & Gates v. Holly Mountain Resources, 108 Wn.App. 557 (2001).
  • Bogle & Gates v. Zapel, 121 Wn.App. 444 (2004).
  • Estate of Hemphill v. Department of Revenue, 153 Wn.2d 544 (2005).
  • Alpental Community Club v. Seattle Gymnastics Society, 154 Wn.2d 313 (2005).
  • Grant County P.U.D. v. North American Foreign Trade Zone, 2007 Wash. LEXIS 125 (Wash., Feb 1, 2007).
  • Alhadeff v. Meridian of Bainbridge Island, LLC, 167 Wn 2d 601; 220 P.3d 1214; 2009 WASH LEXIS 1067 (Leading case in Washington State limiting claims against a credit union participating in a letter of credit transaction).
  • Peterson v. Kitsap Community Federal Credit Union, 171 Wn.App. 404; 287 P.3d 27; 2012 Wash.App. LEXIS 2483 (Class Action summary judgment against credit union reversed on appeal and remanded for trial).
  • Education

    • J.D., Gonzaga University School of Law, 1977.
    • B.A., cum laude, Seattle University, 1974.

    Community Involvement

    • Co-founder, Legal Action Center, established through Catholic Community Services.
    • Volunteer, legal services, Tenant’s Union, Seattle.
    • Board member, Banchero Friends Services, a nonprofit corporation providing housing and other services for developmentally disabled adults.
    • Board member, numerous educational and nonprofit organizations
    • Coach, youth and Special Olympics soccer, for more than 20 years.

Frank’s paralegals: Mary Berghammer, Valerie Loxtercamp.