Strauss Borrelli PLLC, a leading data breach law firm, is investigating Kiernan Trebach, LLP regarding its recent data breach. The Kiernan Trebach data breach involved sensitive personal information belonging to an undetermined number of individuals.
ABOUT KIERNAN TREBACH, LLP:
Kiernan Trebach is a mid-sized law firm based in Washington, DC. Founded in 1989, Kiernan Trebach provides legal services in a variety of practice areas, including employment, healthcare, environmental, hospitality, transportation, and more.3 More specifically, Kiernan Trebach’s practice encompasses every facet of defense-related litigation, including product liability, food industry claims, insurance coverage disputes, medical and other professional malpractice, construction and construction defect, employer liability, residential care facility claims, white collar criminal defense, corporate investigations, consumer fraud, toxic torts, hazardous waste, and a full range of environmental matters under federal and state statutes.3 Headquartered in Washington, DC, Kiernan Trebach has offices throughout the Northeast, Mid-Atlantic and Southeast regions of the United States – from Maine to Florida, and employs over 50 individuals. 2
WHAT HAPPENED?
Recently, Kiernan Trebach reported to the Attorney General of New Hampshire that it had experienced a data breach in which sensitive personal identifiable information in its care may have been compromised. According to the breach notice, on or around October 21, 2024, Kiernan Trebach became aware of potential suspicious activity in its network environment.1 As a result, Kiernan Trebach launched an investigation to determine the nature of the incident.
Through its investigation, Kiernan Trebach confirmed that sensitive personal information in its systems may have been accessed by an unauthorized third party on three different occasions, May 4, 2023, October 26, 2023, and September 24, 2024. As a result, Kiernan Trebach began a review of the data to determine what information had been impacted as well as identify the specific individuals affected. On or around March 4, 2025, Kiernan & Trebach completed this review. While the information impacted varies depending on the individual, the type of information potentially exposed includes:
- Name
- Social Security number
On May 7, 2025, Kiernan Trebach began mailing data breach notification letters to impacted individuals. Based on the breach notice sent to New Hampshire residents, Kiernan Trebach is providing affected individuals with a list of the specific types of sensitive information impacted and complimentary credit monitoring services. A link to the form breach notification letters that Kiernan Trebach filed with the Attorney General of New Hampshire is below.
If you received a breach notification letter from Kiernan Trebach, LLP:
We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at 872.263.1100 or sam@straussborrelli.com.
