National labor, employment and cybersecurity law firm Constangy, Brooks, Smith & Prophete, LLP is pleased to announce Catherine Geisler has joined the firm’s Cyber Team and will be located in the Chicago office. Geisler joins the 57-member team, continuing the firm’s expansion of service to clients in this critical area of business.

Geisler assists clients in responding to various data security incidents such as ransomware, business email compromises, and other types of cyberattacks. Through her daily work helping to manage responses to data security incidents, she stays abreast of the evolving legal landscape regarding privacy and cybersecurity issues to better serve clients. She also has substantial experience providing clients with advice on the development of policies and procedures for data privacy and security to ensure compliance with all U.S. laws, such as the California Consumer Privacy Act (CCPA) and Health Insurance Portability and Accountability Act (HIPAA), and international privacy laws, such as the General Data Protection Regulation (GDPR).

Geisler worked as an associate in an insurance practice group prior to joining Constangy, where she represented insurance carriers in a variety of insurance coverage disputes. Her experience included analyzing insurance coverage issues, assessing insurance carriers’ risks, preparing coverage opinions and position letters, and handling all aspects of insurance coverage litigation in state and federal courts. This experience makes Geisler particularly well-suited to assess and help mitigate third-party liability during the incident response process.

Geisler has written extensively on data privacy and security matters, and she serves as the technology columnist for Illinois Defense Counsel. She also holds the Certified Information Privacy Professional/United States (CIPP/US) credential from the International Association of Privacy Professionals (IAPP). Geisler was recognized in the 2023 edition of The Best Lawyers in America® “Ones to Watch.”


Constangy, Brooks, Smith & Prophete offers a wider lens on workplace law. We have counseled employers exclusively since 1946. With offices in 21 states, we are one of the largest labor and employment law practices in the U.S., with a growing Cybersecurity & Data Privacy practice group to match. Constangy has been named as a top firm for women and minorities by organizations including Working Mother Magazine, Law360the National Law Journal and Many of our more than 200 attorneys have been recognized by leading authorities such as Chambers USA®, The Best Lawyers in America® and Martindale-Hubbell. Find out more about us online at or follow us on Twitter @ConstangyLaw.


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