Kareen O'Brien

Kareen O'Brien

Arizona's Family Law Team - Stewart Law Group
  • Divorce, Family Law, Domestic Violence ...
  • Arizona, California
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Kareen O'Brien joined the Stewart Law Group in 2016 and has been practicing law since 2004. She spent six years with the L.A. County District Attorney's Office in California where, as Deputy District Attorney, she was a Major Crimes Prosecutor. She prosecuted serious and violent felons, primarily those who had committed acts of domestic violence, sexual abuse, and assault. (She prosecuted and won a fraud case where Christopher Darden of the O.J. Simpson trial was defense counsel!) After leaving L.A. for Phoenix, Arizona, she became an active member of the State Bar of Arizona and later joined the Maricopa County Attorney's Office as a Deputy County Attorney in the Sex Crimes Bureau. With hundreds of court hearings and over 40 jury trials under her belt, she knows how to uncover the truth and pursue justice. Quick to spot false allegations and expose ulterior motives, she went into private practice to continue assisting families in crisis and to focus on divorce and family law issues. Justice and fairness for clients has always been her top priority (and why "To Kill a Mockingbird" is her favorite book). Along with her domestic relations and prosecutorial background, she has experience in special education law, estate planning, and construction law. Empathetic to her clients' circumstances, she is a great listener with a talent for explaining complex legal concepts in terms people really understand. Knowing that the most important issues in divorce are those involving the children, she understands how intensely emotional, stressful, and volatile family matters can be. When she represents a client in a case that involves an abusive parent, she does everything in her power to make sure the client's child is protected and placed in an appropriate environment. In her free time, she loves reading, watching movies, building Lego kits, hiking, biking, camping, running marathons, and watching Cardinals games.

Practice Areas
    Collaborative Law, Contested Divorce, Military Divorce, Property Division, Same Sex Divorce, Spousal Support & Alimony, Uncontested Divorce
    Family Law
    Adoption, Child Custody, Child Support, Father's Rights, Guardianship & Conservatorship, Paternity, Prenups & Marital Agreements, Restraining Orders, Same Sex Family Law
    Domestic Violence
    Domestic Violence Criminal Defense, Domestic Violence Restraining Orders, Victims Rights , Victims Rights
    Criminal Law
    Criminal Appeals, Drug Crimes, Expungement, Fraud, Gun Crimes, Internet Crimes, Sex Crimes, Theft, Violent Crimes
Additional Practice Areas
  • Child Custody
  • Special Education Law
  • Credit Cards Accepted
Jurisdictions Admitted to Practice
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  • English: Spoken, Written
Professional Experience
Stewart Law Group
- Current
Law Offices of Kareen O'Brien, PLLC
Deputy County Attorney
Maricopa County Attorney's Office
Deputy District Attorney
Los Angeles District Attorney's Office
Associate Attorney
Law Offices of J. Andrew Coombs, APC
Southwestern University School of Law
J.D. (2004) | Law
Activities: Moot Court
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University of California - Irvine
B.A. (1991) | Political Science
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Southwestern Intramural Moot Court Competition
2nd Place Brief and Semi-Finalist Team
Cardozo Moot Court Competition
Professional Associations
Maricopa County Bar Association
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State Bar Military Legal Assistance Committee
- Current
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State Bar of Arizona, Family Law Section
- Current
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State Bar of Arizona, Criminal Justice Section
- Current
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State Bar of Arizona  # 029308
- Current
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State Bar of California
- Current
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Articles & Publications
Giving Rise to a Claim: Is FTAIA's Section 6A(2) an Antitrust Plaintiff’s Key to the Courthouse Door?
Southwestern Journal of Law and Trade in The Americas
Speaking Engagements
The Uniform Act To Secure Witnesses, Business Records, Hearsay, and the Constitution, Los Angeles County District Attorney Saturday Seminar
L.A. County District Attorney's Office (2010)
Helping Your Witness Experience ‘Total Recall’ on the Stand (Hearsay Exceptions), Los Angeles County District Attorney's Office-Branch CLE Program
L.A. County District Attorney's Office (2010)
Websites & Blogs
Glendale Family Law Attorney
Contact & Map
Phoenix (Main) Office
777 E Thomas Rd Ste 210
Phoenix, AZ 85014
Telephone: (602) 548-3400
Scottsdale Office
17470 N Pacesetter Way
Scottsdale, AZ 85255
Telephone: (480) 425-1400
Glendale Office
20325 N 51st Ave Ste 134
Glendale, AZ 85308
Telephone: (623) 815-4700
Peoria Office
14050 N 83rd Ave Ste 290
Peoria, AZ 85381
Telephone: (623) 561-8200
Chandler Office
3115 S Price Rd Ste 111
Chanlder, AZ 85248
Telephone: (480) 813-4800
Tempe Office
4700 S Mill Ave Ste 5
Tempe, AZ 85282
Telephone: (480) 420-0502
Mesa Office
2929 N Power Rd Ste 101
Mesa, AZ 85215
Telephone: (480) 491-0109
Gilbert Office
1166 E Warner Rd Ste 101
Gilbert, AZ 85296
Telephone: (480) 409-0440
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