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About me

Daniel J. Kollias received his law degree from Notre Dame Law School 1999.  He is also a 1995 graduate of the University of Michigan, where he earned a B.A. in Economics. During law school, Dan worked as a law clerk for the Cook County State’s Attorney’s Office at 26th and California in Chicago.


After graduating law school, Dan worked as an Assistant State’s Attorney in the Cook County State’s Attorney’s Office, where he prosecuted criminal appeals and juvenile abuse and neglect cases.  After leaving the State’s Attorney’s Office, Dan successfully owned and managed a restaurant and bar in Elmhurst.  Dan sold the business in 2002, and returned full-time to the practice of law.


Dan has represented clients in many areas of the law, but primarily focuses his practice on family law.  He handles divorce, legal separation, paternity, child custody, visitation, and child support cases.  Dan also has extensive experience in appellate work, having prevailed in 27 criminal and civil cases on appeal. 


            Dan is an active member of the Du Page County Bar Association, and has given presentations on topis of child custody evaluations and challenges to paternity.  He is certified as a guardian ad litem in DuPage County.  Dan speaks Greek fluently.


Languages spoken: Greek

Photos and videos

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Contact info

Kollias & Giese, PC

400 S. Knoll St.
Suite B
Wheaton, IL, 60187

1 N 141 County Farm Rd., Suite 230
Winfield, IL, 60190-2032


Practice areas


  1. Divorce: 40%
    17 years
  2. Child Support: 20%
    17 years
  3. Child Custody: 20%
    17 years
  4. Family: 10%
    17 years
  5. Corporate: 10%
    17 years



Retainer (always), Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

21 total 

Are you an attorney? Endorse this lawyer

  • Peter C. Wachowski

    I have known Dan for at least 15 years. What I like about Dan is that he practices law the way it should be practiced. He tells you what he is going to do and then he does it. He stays on top of the cases and does a great job. People don't have great reputations just because they show up to work. They have great reputations because there are hard-working, honest, and deliver. That's what you get with Dan. Clearly he has become a leader in the area of family law.


    Peter Wachowski Workers compensation Attorney
    Relationship: Fellow lawyer in community

  • Anique Kane Drouin

    Daniel is a strong litigator, but also a reasonable and sound negotiator. His knowledge of the law and practice are top notch. I endorse this lawyer.


    Anique Drouin Divorce and separation Attorney
    Relationship: Fellow lawyer in community


ILActive And Authorized To Practice Law199905/11/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Work experience
TitleCompany nameDuration
PartnerKollias & Giese, P.C.2014 - Present
PartnerMullen, Winthers & Kollias, P.C.2009 - 2014
Sole PractitionerLaw Offices of Daniel J. Kollias, P.C.2003 - 2009
Assistant State's AttorneyCook County State's Attorney's Office1999 - 2001
Association namePosition nameDuration
DuPage County Bar AssociationN/A2003 - Present
Legal cases
Case nameOutcome
Marriage of RolsethAffirmed on appeal.
See all legal cases 
School nameMajorDegreeGraduated
Notre Dame Law SchoolLawJD - Juris Doctor1999
University of MichiganEconomicsBA - Bachelor of Arts1995
Speaking engagements
Conference nameTitleDate
Child Advocacy CLE SeminarChild Custody Evaluations2013
DCBA Family Law Committee MeetingPost Decree Paternity Challenges2009