MasTec, Inc. Reports 2026 Data Breach to Maine AG

MasTec, Inc., an infrastructure construction company, filed a data breach notification with the Maine Attorney General on June 5, 2026. The incident potentially exposed sensitive personal information, including Full Name, Social Security Number, and Direct Deposit Account Details. Individuals who receive a notification should review it carefully to understand the specific data involved.

State: Maine
Reported: June 5, 2026

What may have been exposed

Full Name
Social Security Number
Date of Birth
Wage and Compensation Information
Tax Return Information
Direct Deposit Account Details
Mailing Address
Phone Number

MasTec, Inc., a prominent infrastructure construction company, officially reported a data security incident to the Maine Attorney General's office on June 5, 2026. This notification indicates that the company experienced a breach affecting its network infrastructure, which may have led to unauthorized access to sensitive personal information.

The compromised data categories reported include Full Name, Social Security Number, Date of Birth, Wage and Compensation Information, Tax Return Information, Direct Deposit Account Details, Mailing Address, and Phone Number. These types of records are typically maintained as part of human resources and payroll operations for current and former employees or field personnel.

Exposure of such personal identifiers and financial details can significantly increase the risk of identity theft and various forms of financial fraud. Individuals affected by the breach may face potential threats such as unauthorized account access, attempts to open new credit lines, or targeted scams using their personal information.

For those who receive a data breach notification letter from MasTec, Inc., it is important to read the document thoroughly. Experts commonly advise monitoring financial accounts and credit reports for any unusual activity. Placing a fraud alert or a credit freeze with major credit bureaus can also help protect against further misuse of personal information. Additionally, always exercise caution with unsolicited communications that request personal details.

What to do if you were affected

Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.

Freeze your credit
Place a free credit freeze with Equifax, Experian, and TransUnion. A freeze blocks new accounts from being opened in your name and can be lifted anytime.
Guard against tax fraud
File your tax return as early as possible and consider requesting an IRS Identity Protection PIN so no one can file a fraudulent return in your name.
Watch your financial accounts
Review bank and card statements for unfamiliar activity and turn on transaction alerts. Report anything you don't recognize to your bank right away.
Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

Source: Maine Attorney General filing

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