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Matthew J. Sullivan

Matthew J. Sullivan

also known as Matt Sullivan

About me

Matt Sullivan is a Chicago attorney who specializes in providing high-quality legal representation to businesses and individuals who demand lower hourly rates than a large law firm can provide but without sacrificing quality and continuity. 


Mr. Sullivan's clients range from Fortune 100 companies to small businesses. Representative clients include RJB Properties, Inc., Blackstone Consulting, Inc., CVS Caremark Inc., A.J. Maggio Co., Relational LLC, Haeger Engineering, LLC, Theros International Gaming, Inc. and Travelers Casualty and Surety Company of America.


Particular areas of emphasis are commercial litigation, appeals, construction litigation, employment discrimination, intellectual property disputes and local counsel work.


Prior to founding the firm in 2009, Mr. Sullivan practiced for six years at Winston & Strawn, LLP.  Mr. Sullivan clerked for the Hon. Jack O'Malley of the Second District Court of Appeals.  He graduated cum luade from University of Illinois College of Law in 2002.


Practice areas


  1. Critical Motions: 67%
  2. Appeals: 33%

Attorney endorsements

8 total 

Are you an attorney? Endorse this lawyer

  • Monika M Blacha

    Matt is a fantastic attorney. He is detail oriented, extremely knowledgeable as to the law and its ramifications in specific situations but more than anything he is a superb advocate for his clients. I refer my own clients to Matt all the time when they need representation in areas I do not practice in. I wholeheartedly endorse Matt.


    Monika Blacha Divorce & Separation Attorney
    Relationship: Worked together on matter

  • Joseph Samuel Leventhal

    Matt is an excellent lawyer with both legal skills and business skills. He understands his clients' business objectives and knows how to adroitly align those with the law. I would recommend Matt without hesitation.


    Joseph Leventhal Litigation Attorney
    Relationship: Friend

Contact info

The Law Office of Matthew J Sullivan LLC

55 West Wacker Drive
Suite 1400
Chicago, IL, 60601


ILActive And Authorized To Practice Law200211/12/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Pro Bono AwardWinston & Strawn LLP2007
Work experience
TitleCompany nameDuration
Adjunct ProfessorNorthern Illinois University College Of Law2013 - Present
PrincipalThe Law Office of Matthew J. Sullivan, LLC2009 - Present
AttorneyWinston & Strawn, LLP2004 - 2009
Judicial ClerkHonorable Jack O'Malley, Second District Court of Appeals, Illinois2002 - 2004
Association namePosition nameDuration
Cook County Bar AssociationMember2012 - Present
Federal Trial Bar for the Northern District of IllinoisN/AN/A
Legal cases
Case nameOutcome
EEOC v. R.J.B. Properties, et alWon summary judgment for vast majority of claims. The remainder settled.
Relational, LLC v. HodgesWon appeal
U.S. v. NataleAwaiting Decision of Appellate Court
See all legal cases 
School nameMajorDegreeGraduated
University of Illinois College of LawLawJD - Juris Doctor2002
University of Illinois, Urbana-ChampaignHistoryBA - Bachelor of Arts1999