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About me

Jason authoritatively advocates for sophisticated professionals and their spouses who want fair and equitable results. Jason utilizes creativity and compassion to resolve complicated divorce and custody disputes and is prepared to effectively represent his client’s best interests in court when prudent. Jason strenuously believes in putting the children first in every divorce situation.

Jason began his career at Schiller DuCanto & Fleck LLP in 2001 as a law clerk and has practiced as an attorney since 2003.  Jason has tried many complex divorce cases involving multi-million dollar estates and complicated asset and income structures. Jason recently finished a 27-day divorce trial with numerous business valuation experts and witnesses.

Jason is currently a director on the Chicago Kent Alumni Board of Directors. Jason is also a founding co-chair of the Chicago Kent Young Alumni Counsel which is accountable for providing continuing education to alumni and furthering alumni relationships. 

Jason is a former board member of the Collaborative Law Institute of Illinois (“CLII”) and he now trains new and existing colleagues and professionals to (better) practice Collaborative Law. Jason also assisted in the redrafting and updating of the Participation Agreement used in every Collaborative divorce across the State of Illinois.

Jason graduated from the 2010 American Bar Association Trial Advocacy Institute where he enhanced his skills and competence as a trial lawyer. In 2011, Jason completed the two-day Harvard Law School Negotiation Program to improve his dispute resolution skills.

Jason has and continues to lecture at Chicago Kent College of Law, Loyola Law School, DePaul Law School, the Illinois CPA Society and the Chicago Bar Association and other legal agencies on a number of family law issues including Collaborative Law, trial techniques as they relate to business valuation experts, marriage and divorce planning, guardianship divorce actions on behalf of wards, prenuptial agreements, domestic violence and child custody disputes.

Jason is an active member of the committee responsible for creating the Chicago Bar Foundation's Legal Aid Academy which provides continuing legal education to public interest attorneys at no cost. Jason was also awarded by the Legal Assistance Resource Center for his substantial pro bono efforts and achievements.

Jason graduated from the Indiana University School of Business in 2000 with a B.S. in Marketing and minors in Economics and International Business. As part of his B.S. program, Jason studied economics abroad at Erasmus University in Maastricht, Netherlands.

Jason lives in Oak Park and proudly balances being a lawyer, husband and father to his 7 year old daughter and newborn son.  


Photos and videos

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Practice areas


  1. Divorce: 50%
    13 years
  2. Child Custody: 25%
    13 years
  3. Family: 25%
    13 years


Payment types:

Cash, Check, Credit card

Attorney endorsements

14 total 

Are you an attorney? Endorse this lawyer

  • Benton Hutul Page

    Jason is an excellent advocate for his clients. He is practical, experienced, respected by lawyers and judges alike, and obtains great results for his clients. It is always a pleasure to work with Jason.


    Benton Page Family Attorney
    Relationship: Opposing Counsel on matter

  • Mark V. Clay

    I highly endorse Mr. Sposeep. Very knowledgeable and caring attorney who gets great results in representing clients! I want all people with legal problems to contact him first.


    Mark Clay Immigration Attorney
    Relationship: Fellow lawyer in community

Contact info

200 N. Lasalle St., 30th Floor
Chicago, IL, 60601-1019


ILActive And Authorized To Practice Law200311/12/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Super LawyerSuper Lawyers Magazine2016
Best LawyersThe Best Lawyers in America2016
Best LawyersThe Best Lawyers in America2015
Super LawyerSuper Lawyers Magazine2015
Leading LawyerLeading Lawyers in America2014
Rising StarSuper Lawyers Magazine2014
Rising StarSuper Lawyers Magazine2013
Rising StarSuper Lawyers Magazine2012
Certificate for 7 day programABA Trial Advocacy Institute2010
Catholic Charities Volunteer of the MonthLegal Assistance Resource Center2008
Work experience
TitleCompany nameDuration
PartnerSchiller DuCanto & Fleck LLP2001 - Present
Association namePosition nameDuration
Chicago Kent Alumni BoardDirector2013 - Present
Young Alumni Council of Chicago Kent College of LawCo-chair2010 - 2012
Collaborative Law Institute of IllinoisTreasurer2009 - 2012
International Academy of Collaborative ProfessionalsMember2008 - Present
Chicago Bar AssociationMember2003 - Present
American Bar AssociationMember2003 - Present
Legal cases
Case nameOutcome
Corbin v CorbinOverturns dated caselaw
See all legal cases 
School nameMajorDegreeGraduated
Chicago-Kent College of Law Illinois Institute of TechnologyLawJD - Juris Doctor2003
Indiana University-BloomingtonMarketing, EconomicsBS - Bachelor of Science2000
Speaking engagements
Conference nameTitleDate
Lilac TreeConsidering Your Path to Divorce2016
Advanced Collaborative Training SeminarMaking the Market for the Team-Based Approach2016
YLS CBA Family LawCollaborative Divorce: What it is and what it isnt.2015
Illinois Institute for Continuing Legal EducationWorking Effectively With Expert Witnesses in Family Law2015
CLII - Basic Interdisciplinary Collaborative Practice TrainingBasic Interdisciplinary Collaborative Practice Training2015
Stout Risius and RossWhat Does a Divorce Lawyer Want From a Forensic Accountant2014
Ledded Ltd. PresentsChanging Landscape of Family Law2013
DePaul UniversityDivorce Law and Public Policy2013
CVLS Collaborative Law PresentationCollaborative Law2013
Chicago Bar Association, Probate Practice CommitteeCorbin v. Corbin. Guardians Initiating Divorce on Behalf of Wards2013
Divorce and Family PlanningMarriage and Divorce: Planning for the Future2012