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About me

I have focused on the practice of family law for my entire legal career.  I have opened up my own firm Opal O'Brien LLC where we do things differently than most other law firms.  Our level of service is paramount, and our clients will be able to tell, above all else, that we genuinely care about our clients and getting them the best possible results.  

I practice all areas of family law, including, but not limited to, divorce, paternity, child custody, visitation, removal litigation, grandparent visitation, adoption, child support, maintenance and spousal support formerly known as alimony, orders of protection, enforcing court orders and judgments, guardinaship, and  post-judgment litigation, in DuPage, Kane, Will, Kendall, and Cook County.   I do not generally charge my clients for any travel time or parking related expenses. 

I also handle appeals. I have argued in front of the Second District Court of Appeals and I have drafted numerous briefs at the Appellate Court level.   

I pride myself on keeping my clients informed and in the loop during the divorce process.  Communication is paramount in having a successful attorney-client relationship.  I have substantial experience trying cases and putting on hearings.  I also have the skills to succesfully negotiate cases so as to avoid the expense of a full-blown trial. 

My firm also handles criminal defense cases.  We handle just about every criminal case, including but not limited to domestic battery, DUI, traffic tickets and other felonies.  

I am proud of my recent award of emerging lawyer, a distinction earned by fewer than two percent of all lawyers licensed to practice law in Illinois who are 40 years old or less or practicing 10 years or less. 

Contact me by phone or by email.  My email is and my phone number is 630 703 9176.  Consultations are free (on the phone or in person).  I will make myself available to meet with you after normal business hours or on weekends.






Practice areas


  1. Divorce: 100%
    8 years



Retainer (always), Free consultation (60 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

50 total 

Are you an attorney? Endorse this lawyer

  • Michael J. Chiero

    Mr. O'Brien is an extremely talented attorney; I did not qualify my endorsement by stating his age, as his skill level is highly advanced for his number of years in practice.


    Michael Chiero Marriage and prenuptials Attorney
    Relationship: Opposing Counsel on matter

  • Boris Djulabic

    Joe is a top notch lawyer and human being. It is rare to find an attorney who knows the law, court system, and how to relate to clients in an effective, down to earth manner. I've known Joe for many years, and have recently worked with him successfully. I recommend him highly and without hesitation.


    Boris Djulabic Criminal defense Attorney
    Relationship: Worked together on matter

Contact info

Opal O'Brien LLC

2100 Manchester Road, Suite 605
Wheaton, IL, 60187


ILActive And Authorized To Practice Law200805/17/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Emerging LawyerLeading Lawyers2016
2016 Rising StarsSuper Lawyers2015
2015 Top Contributer AwardAvvo2015
2014 client's choice awardAvvo2014
Top ContributorAvvo2014
Client's Choice AwardAvvo2014
Top ContributorAvvo2013
Featured AttorneyAvvo2013
Client's Choice AwardAvvo2013
Cali Award-Secured TransactionsThe John Marshall Law School2008
Law ReviewThe John Marshall Law School2007
Dean's ListThe John Marshall Law School2007
Dean's ListThe John Marshall Law School2006
Phi Alpha Theta Historical Honors SocietyMarquette University2004
Work experience
TitleCompany nameDuration
PartnerOpal O'Brien LLC2015 - Present
AttorneyRoberts PC2010 - 2015
711 assistantCook County State Attorney's Office, Felony Trial Division2008 - 2008
AttorneyDenis J. McKeown and Associates2008 - 2010
Research AssistantThe John Marshall Law School2007 - 2007
Legal InternCook County State's Attorney's Office, Civil Actions Bureau2007 - 2008
Law clerkThe Honorable Richard J. Elrod2007 - 2007
Legal InternCook County Public Defender2006 - 2006
Association namePosition nameDuration
Illinois State Bar AssociationN/A2015 - Present
Inns of Courtmember2014 - Present
DuPage County Legal Access CommitteeN/A2012 - Present
DuPage County Bar AssociationN/A2010 - Present
Young Lawyers CommitteeN/A2011 - 2012
John Marshall Law ReviewN/A2006 - 2007
Legal cases
Case nameOutcome
Family Law removal case and subsequent appealSuccessful
Kane County Divorce CaseSuccessful
Will County HearingSuccessful
See all legal cases 
Publication nameTitleDate
The John Marshall Law ReviewIs Chicago's Plan for Transformation Promoting Integration or Reinforcing Segregation?2007
School nameMajorDegreeGraduated
John Marshall Law School, ChicagoLawJD - Juris Doctor2008
Marquette University Law SchoolHistoryBS - Bachelor of Science2005
Speaking engagements
Conference nameTitleDate
Inns of CourtAlternative Fee Arrangements2014
DuPage County Bar AssociationFamily Law Intake2014
DuPage County Bar Association(Assisted) Section 503(g) Trusts and "Adult" Child Support under Section 513 of the Illinois Marriage and Dissolution of Marriage Act2011