About M. Sean Breen

Sean Breen grew up in Idaho and is a graduate of both Idaho State University and the University of Idaho. Sean is retired from the United States Army having served our country for over 23 years. Sean is an experienced trial attorney who began his practice in 1994 after clerking at the U.S. Department of Justice, Minnesota Attorney General's Office and the U.S. Department of Energy.

Sean now primarily practices in domestic relations (or family law) but also handles general legal matters (e.g. contracts, non-compete agreements, business formation, landlord tenant, probate, employment, personal injury, workers comp, etc.). Sean has litigated hundreds of civil trials in southern Idaho involving a number of different legal matters.

Sean and his wife, Lora (who is also a senior Army officer and an attorney) helped co-found Anser Charter School; Idaho's first service-oriented and community-based K-8 public charter school. They spent several years helping the school plan and organize the purchase and remodel of the school's current facilities. Sean also participates in numerous other service-oriented activities including the Idaho Academy of Leadership for Lawyers (IALL), Recreation Unlimited (Bogus Basin's adaptive ski program), and Boise's downtown YMCA. He also volunteers his time through coaching soccer, baseball, tennis and other youth sports programs. Sean spends many summer afternoons rafting Idaho's wild and scenic rivers in the summer and skiing Idaho's mountains in the winter.

To Visit Sean's Firm's Website Click Here: https://mmbb-law.com


M. Sean Breen, Sr., born in Austin, Texas in 1963. Grew up in Idaho from 1966 to the present.


Idaho State University (Bachelor of Arts with honors) 1986; University of Idaho College of Law (Juris Doctorate) 1994; William Mitchell College of Law (visiting student Spring 1994).


Idaho State Bar admitted in 1993 (Member of the Family Law, Litigation, and Professional Ethics Sections); American Inns of Court, Barrister (Eagle Rock Inn); Idaho Volunteer Lawyers Program, Idaho Trial Lawyers Association, Idaho Academy of Leadership for Lawyers (IALL), Professional Ski Instructors of America (PSIA). Member, Association of Family and Conciliation Courts (AFCC) 2007 to Present.


Major (Retired) U.S. Army Judge Advocate General's Corps. Partner, Manweiler, Breen, Ball & Davis from 1999. Environmental law and regulatory compliance work at the Idaho Nuclear Laboratory (INL) 1993-1995. Private practice in Idaho Falls, Idaho from 1995 - 1999. Legal clerkships at the U.S. Department of Energy, Minnesota Attorney General's Office and U.S. Department of Justice.


Representation largely focuses on domestic relations and family law matters (e.g. divorce, child custody, support, adoption, guardianship). Also conducts legal reviews and litigates the validity non-competition agreements, represents injured workers and other persons injured by the negligence of others.


Frieburger vs. JUB Engineers, Inc. 141 Idaho 415 (2005). This Idaho Supreme Court case establishes the legal precedent under which non-compete agreements are analyzed under Idaho law.