Strauss Borrelli PLLC, a leading data breach law firm, is investigating Cliff Viessman, Inc., which does business as Viessman Trucking (“Viessman Trucking”), regarding its recent data breach. The Viessman Trucking data breach may have involved sensitive personal identifiable information and protected health information belonging to over 3,600 individuals.
ABOUT CLIFF VIESSMAN, INC DBA VIESSMAN TRUCKING:
Viessman Trucking is a transportation company based in South Dakota. Founded in 1961, Viessman Trucking hauls food-grade bulk products such as milk, dry sugar, cornstarch, corn sweetener, and vegetable oil across the U.S. and Canada .2 Depending on their locations, Viessman Trucking terminals are dedicated one or more of its five divisions: tanker, live bottom, pneumatic (dry bulk), hopper, and reefer.3 Headquartered in Gary, South Dakota, Viessman Trucking employs over 200 individuals and has terminals in Iowa, Minnesota, Nebraska, North Dakota, Ohio South Dakota, Tennessee, and Wisconsin.2
WHAT HAPPENED?
Recently, Viessman Trucking reported to the Attorney General of New Hampshire that it had experienced a data breach in which sensitive personal identifiable information and protected health information in its systems may have been compromised. According to the breach notice, on or around August 5, 2025, Viessman Trucking detected suspicious activity within its network environment.1 As a result, Viessman Trucking launched an investigation to determine the nature of the incident.
Through its investigation, Viessman Trucking confirmed that the sensitive personal information in its systems may have been accessed and copied by an unauthorized third party during the breach.1 As a result, Viessman Trucking began a review of the data to determine what information had been impacted as well as identify the specific individuals affected. While the information impacted varies depending on the individual, the type of information potentially exposed includes:
- Name
- Social Security number
- Driver’s license number
On September 10, 2025, Viessman Trucking began mailing data breach notification letters to impacted individuals. Based on the breach notice being sent to New Hampshire residents, Viessman Trucking is providing affected individuals with a list of the specific types of sensitive information impacted and complimentary credit monitoring services. 1 A link to breach notification letters that Viessman Trucking filed with the Attorney General of New Hampshire is below.
If you received a breach notification letter from Cliff Viessman, Inc. dba Viessman Trucking:
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.
