Profile Image Placeholder

Amanda O'Shea Tiernan

  • Family Law, Criminal Law, Estate Planning
  • Montana
Claimed Lawyer ProfileSocial Media

Amanda is a Montana girl through and through. She loves spending her time skiing in the winter and camping in the summer. She grew up in Billings and Laurel Montana, and is a proud graduate of Laurel High School. Amanda attended Rocky Mountain College, in Billings, Montana, where she graduated with a Bachelors of Science in History, Political Science, and Professional Communication Studies, with honors. While at Rocky, she was a member of the Debate Team recieving several awards and invaluable experience. During this time she also interned with Senator Tester's office. Amanda attended law school at Gonzaga University School of Law in Spokane, Washington, where she graduated with honors. While at Gonzaga, she was a member of the Moot Court Team and president of the Woman's Law Caucus. Amanda interned with the University Legal Assistance General Practice Clinic, working primarily on family law and estate planning cases. Amanda moved back to Billings during her final semester in the Winter of 2012. During this time she interned with the United States Attorney's Office in Billings, Montana, focusing on criminal law. Amanda opened Tiernan Law in the Summer of 2015. She has been admitted to the State Bar of Montana since 2013. In her free time, Amanda enjoys spending time with her family exploring the beautiful outdoors and playing softball.

Gonzaga University School of Law
J.D. (2013) | Law
Honors: Cum Laude
Activities: National Moot Court Team.
Gonzaga University School of Law Logo
Rocky Mountain College
B.S. | Professional Communication Studies, History, and Political Science
Honors: Cum Laude
Activities: Collegiate Debate Team
Placeholder image for education.
Professional Associations
State Bar of Montana  # 13104
Placeholder image for professional associations.
Jurisdictions Admitted to Practice
Placeholder image for jurisdictions.
  • Credit Cards Accepted
    We accept American Express, Discover, MasterCard, and Visa.
Practice Areas
Family Law
Adoption, Child Custody, Child Support, Father's Rights, Guardianship & Conservatorship, Paternity, Prenups & Marital Agreements, Restraining Orders, Same Sex Family Law
Criminal Law
Criminal Appeals, Drug Crimes, Expungement, Fraud, Gun Crimes, Internet Crimes, Sex Crimes, Theft, Violent Crimes
Estate Planning
Guardianship & Conservatorship Estate Administration, Health Care Directives, Trusts, Wills
  • English: Spoken, Written
Social Media
Websites & Blogs
Contact & Map
2722 Third Ave North
Suite 325
Billings, MT 59101
Telephone: (406) 248-3900