Thomas J. Costello III | Best, Vanderlaan & Harrington | Chicago, Illinois
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Thomas  J. Costello III


Insurance Coverage Opinion, Analysis, & Litigation
Employment Law & Litigation
Governmental & Municipality Law & Litigation
Insurance Defense
General Litigation


  • University of Illinois, Urbana-Champaign, Illinois
    • J.D., cum laude
  • University of Illinois, Urbana-Champaign, Illinois
    • B.S., Psychology, Minor in Spanish


  • Illinois, 2004
  • Indiana, 2018
  • United States District Courts for the Northern, Central, and Southern Districts of Illinois
Thomas J. Costello III
Tel: 630-752-8000
Fax: 630-752-8763
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Tom Costello is a Partner and based in the firm’s Naperville office, but practices regularly out of the firm’s other offices in Chicago, Rockford and Joliet.  Tom’s practice includes both insurance coverage and civil litigation, including the defense of auto, truck, construction, and premises liability injury claims as well as the defense of complex local public entity, municipality, and labor and employment litigation.  Tom has been a partner with the firm since 2009, and has worked with BVH since 2004.

Tom has successfully defended, through trial and resolution of complex and high-value cases through dispositive motions and alternative dispute resolution, many civil litigation and coverage matters.  Recent examples of the same include complex, multi-million dollar coverage matters and liability defense matters involving premises liability, construction liability, commercial auto, public liability and employment discrimination.  

Tom has been recognized as an Emerging Lawyer by the Leading Lawyers publication in 2015. This recognition is determined by surveys conducted by Leading Lawyers across the state, and the title is defined as an attorney under the age of 40 or has been practicing less than 10 years and who shows promise to be one of the future’s leading lawyers.  Less than 2% of lawyers in Illinois are selected to receive the designation of Emerging Lawyer.

Tom received his Bachelor of Science in Psychology from the University of Illinois at Urbana-Champaign, and also received his J.D., cum laude, from the University of Illinois, where he was a member of the University of Illinois Journal of Law, Technology and Policy.  While in law school, Tom was a member of the team that placed first at the national Henry Manne Law and Economics Moot Court Competition hosted by the U.S. District Court for the District of Columbia.  In addition, Tom also received the CALI award for excellence in Negotiations, the University of Illinois School of Law Rickert Award for Excellence in Oral Advocacy, and was a Nominee for the Rickert Award for Trial Advocacy. 

Tom is admitted to practice in the State of Illinois and the United States District Courts for the  Northern, Central and Southern Districts of Illinois. He is a member of the DuPage County Bar Association, Will County Bar Association, and the Illinois Bar Association.


  • 2016 Illinois Emerging Lawyer (Leading Lawyers)
  • 2015 Illinois Emerging Lawyer (Leading Lawyers)

Thomas Costello Leading Lawyers Badge 2023 Emerging Lawyers Badge 2021Emerging Lawyers Badge 2021Emerging Lawyers Badge 2020Emerging Lawyers Badge 2018Emerging Lawyers Badge 2017Emerging Lawyers Badge 2016 Emerging Lawyers Badge 2015  AM Best Badge