Law Firm Investigates Kiewit Corporation Data Breach
The national class action firm Edelson Lechtzin LLP has launched an investigation into Kiewit Corporation following a cybersecurity breach that exposed the sensitive personal data of current and former employees, along with independent contractors, at the North American engineering and construction giant.
The incident originated from unauthorized access to a Microsoft 365 account, prompting Kiewit to retain forensic experts and notify law enforcement. Following a containment process that included mandatory password resets, the company determined that the exposure concluded around July 24, 2026. Official reports were filed with the Massachusetts Office of Consumer Affairs and Business Regulation on August 21, 2026.
Exposed records vary by individual but may include full names, addresses, dates of birth, Social Security numbers, government-issued identifiers, and employment-related health information. Edelson Lechtzin LLP is currently evaluating potential legal claims for affected parties, citing concerns over the adequacy of data protection measures. Individuals who received notification letters are encouraged to freeze their credit reports and monitor financial accounts for signs of identity theft or fraud as the investigation continues.
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