David Kalat is an information scientist, licensed private investigator, and expert in information security, data analytics, and the forensic examination of electronic evidence.

Mr. Kalat has provided expert testimony in civil and criminal matters in both state and US federal courts. He has testified in bench and jury trials, class certification hearings, arbitrations, preliminary injunction hearings, and other proceedings. His case experience includes testimony in matters involving the Telephone Consumer Protection Act (TCPA), Biometric Information Privacy Act (BIPA), Fair Credit Reporting Act (FCRA), and Computer Fraud and Abuse Act. He has provided expert analysis regarding technical aspects of automatic telephone dialers, biometric authentication systems, surveillance and other video recordings, and relational database design.

Mr. Kalat is the author of numerous publications on the history of information technologies. He leads the Chicago digital forensics lab for BRG’s Global Investigations practice group.

Mr. Kalat is an active member of the Sedona Conference, with a particular focus on the Data Security and Privacy Liability Working Group. He serves on the board of directors of the Chicago Chapter of the Association of Certified Fraud Examiners.

Mr. Kalat holds a master’s degree in library and information science from the University of Illinois at Urbana-Champaign. He earned a bachelor’s degree from the University of Michigan.

Employment History

Duff & Phelps
Director, Disputes and Investigations
2011 – 2015

Professional Affiliations

Association of Certified Fraud Examiners
Chicago Chapter Member

Forensic Expert Witness Association

Chicago Area Litigation Support Managers

Illinois Private Detective License
#115 002487

International Society of Forensic Computer Examiners

Areas of Expertise


University of Illinois
MLIS, Library and Information Science, 2011

University of Michigan
BA, Film and Video Studies, 1992


Who’s Who Legal: Global Leader

  • Data Expert 2021, 2022
“He is a well-rounded subject matter expert, combining technical knowledge, communication skills, project management and practical problem solving.”
  • Digital & Data Forensic Experts 2019, 2020, 2021

“David Kalat receives glowing praise for his ‘ability to consider how to achieve the client’s goals in the most efficient way possible’.”