Cornerstone Energy Services Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating Cornerstone Energy Services, Inc. regarding its recent data breach. The Cornerstone Energy Services data breach involved sensitive personal identifiable information belonging to an undetermined number of individuals.


Cornerstone Energy Services is an energy infrastructure company offering engineering solutions, land services, and management to potential projects. As a full-service engineering solutions company, Cornerstone Energy Services offers aerial mapping, engineering and design solutions, field surveys, drafting, and management and right of way services. Founded in 2012, Cornerstone Energy Services is headquartered in Worcester, Massachusetts, and has licensed surveyors in 12 states and licensed engineers in 16 states. Throughout its U.S. offices, Cornerstone Energy Services employs approximately 90 individuals.


On August 11, 2023, Cornerstone Energy Services discovered that it had experienced a data breach in which the sensitive personal identifiable information in its systems may have been accessed. Through its investigation, Cornerstone Energy Services determined that an unauthorized actor may have accessed this sensitive information through a ransomware attack on July 25, 2023. On August 17, 2023, Cornerstone Energy Services began contacting individuals whose information may have been impacted. The type of information exposed includes:

  • Name
  • Social Security number
  • Driver’s license number
  • Passport number
  • Benefit enrollment information

If you received a breach notification letter from Cornerstone Energy Services, Inc.:

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 (608) 237-1775 or

If you were impacted by the Cornerstone Energy Services data breach, you may consider taking the following steps to protect your personal information.

  1. Carefully review the breach notice and retain a copy;
  2. Enroll in free credit monitoring service provided by Cornerstone Energy Services, Inc.;
  3. Change passwords and security questions for online accounts;
  4. Regularly review account statements for signs of fraud or unauthorized activity;
  5. Monitor credit reports for signs of identity theft; and
  6. Contact a credit bureau(s) to request a temporary fraud alert.

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