Skip to main content

About me

       Nicole Siqueiros, joined the Hallier Law Firm PLC, in 2009, as an associate attorney. Since graduating from law school at Arizona State University, Nicole has focused solely on family law and has extensive experience in divorce, custody, child support, and parenting time.

       Nicole began her career as a legal advocate for domestic violence victims and a case specialist for Child Protective Services (C.P.S.). She later worked at the Maricopa County Superior Court, first as a law clerk for a former family court presiding judge, and then performing mediations in divorce and paternity cases. Nicole began her work as an attorney in private practice at a small family law firm in Phoenix.

        In 2009, Nicole managed the legal department of a local non-profit organization that specialized in supporting women in representing themselves during their family law cases.

         Nicole serves on the Board of Directors of both the Maricopa County Bar Association's Family Law Section and Los Abogados, the Hispanic Bar Association.  Nicole was selected to participate in the 2009 – 2010 State Bar of Arizona's Leadership Institute.  She was recently appointed to serve on the State Bar of Arizona's Committee on Minorities and Women in the Law. She speaks both Spanish and Italian.


Languages spoken: Spanish, Italian

Practice areas


  1. Family: 25%
    11 years
  2. Divorce: 20%
    11 years
  3. Child Support: 20%
    11 years
  4. Child Custody: 20%
    11 years
  5. Domestic Violence: 15%


Payment types:

Cash, Check, Credit card

Attorney endorsements

14 total 

Are you an attorney? Endorse this lawyer

  • Sylvina D Cotto

    I endorse this lawyer. Nicole is an excellent attorney and knows how to represent her client's best interest. I have personally witnessed "the other side" (not me) leaving court after going up against her and they were not very happy!


    Sylvina Cotto Divorce and separation Attorney
    Relationship: Opposing Counsel on matter

  • John R Gaertner

    Nicole is a very talented attorney. In a recent case where she represented the Wife and I the Husband, Nicole was reasonable and a very effective advocate for her client. I strongly endorse her.


    John Gaertner Family Attorney
    Relationship: Opposing Counsel on matter

Contact info

Rader Lucero, PLLC

11260 North Tatum Boulevard
Suite 143
Phoenix, AZ, 85028


AZActive 200703/28/2012
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top 40 under 40 HonoreePhoenix Business Journal2011
Work experience
TitleCompany nameDuration
Managing Attorney of the Legal DepartmentFresh Start Women's Foundation2008 - 2009
Case SpecialistDepartment of Economic Security - Child Protective Services2007 - 2007
Associate AttorneyA Small Phoenix Family Law Firm2007 - 2009
Attorney Case Manager and MediatorMaricopa Superior Court2006 - 2007
Judicial Law ClerkMaricopa Superior Court2005 - 2006
Legal AdvocateSojourner Center2005 - 2005
Association namePosition nameDuration
Maricopa County Bar Association, Family Law (Including Juvenile Law) SectionBoard of Directors2009 - Present
State Bar of Arizona's Committee on Minorities and Women in the LawCommittee Appointed Member2009 - Present
Arizona Women Lawyers AssociationMember2007 - Present
Maricopa County Bar Association, Family Law (Including Juvenile Law) SectionPresident/Chair2012 - 2012
Los Abogados Hispanic Bar AssociationBoard of Directors2010 - 2011
Tumbleweed Center for YouthBoard of Directors2009 - 2010
State Bar of Arizona - Bar Leadership InstituteSelected Participant2009 - 2010
American Bar Association Young Lawyer's Division Family Law SectionVice-Chair2008 - 2008
Legal cases
Case nameOutcome
Post-Decree Modification of Custody and Parenting TimeFather did not relocate with the children
Divorce Case in which Wife was awarded Spousal Maintenance and Full CustodyWife was awarded alimony & full custody
Order of Protection in Domestic Violence CaseEx-Girlfriend's Order of Protection was Upheld
See all legal cases 
Publication nameTitleDate
Maricopa County Bar NewsletterAsk An Associate...(Monthly Reoccuring Column)2011
Maricopa County Bar Association Family Law SectionOrders of Protection: What You Didn't Know2010
The School PsychologistSchaeffer v. Weast, New Supreme Court Ruling2006
School nameMajorDegreeGraduated
Arizona State University Sandra Day O'Connor College of LawLawJD - Juris Doctor2005
University of ArizonaN/ABA - Bachelor of Arts2001
Speaking engagements
Conference nameTitleDate
Minority Bar ConventionServing Minority Clients in Family Law2011
Family Law Trial AdvocacyFamily Law Trial Advocacy2011
Family Law 101 SeriesHow the Court Determines Spousal Maintenance and Child Support2011
Arizona Supreme CourtDomestic Violence and Immigrants2011
Arizona Paralegal Conference 2011The Use of Paralegals in Family Law2011
Arizona Paralegal Conference 2011Use of Paralegals in Family Law2011
Continuing Legal Education Speaking EngagementFamily Law Trial Advocacy2010
Continuing Legal Education Speaking EngagementSpousal Maintenance 1012010
2010 Minority Bar ConventionDomestic Violence Among Undocumented Immigrants2010
Continuing Legal Education Speaking EngagementRepresenting Domestic Violence Victims2009