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Hamilton Construction Co.

Hamilton Construction Co. Vendor Cyber Rating & Cyber Score

hamil.com
in
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ISO 27001
SOC 2 Type 1
SOC 2 Type 2
PCI DSS
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Hamilton Construction Co. is one of the West’s leading heavy civil contractors. We specialize in transportation projects with an emphasis on major bridge replacement and rehabilitation, highway interchange and bypass construction, transit and rail work, and concrete structural components. Our skilled team of engineers and contractors are comfortable working in high-traffic urban zones, populated recreational areas, sensitive natural habitats, and even the most remote regions of Alaska. Our bonding capacity, inventory of equipment, material resources, and value engineering give us the ability to efficiently and effectively approach the most demanding jobs. Hamilton excels at complex projects in challenging environments, and has


HCC A.I CyberSecurity Scoring

Incident Details
HCC
Company Information
Website:http://www.hamil.com
Employees number:94
Number of followers:987
NAICS:23
Industry Type:Construction
Homepage:hamil.com
Cyber Premium EstimationGet Supply Chain
HCC Risk Score (AI oriented)
Between 650 and 699
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HCCConstruction
Updated:
29/03/2026
692/1000
Weak
B
AaaAaABaaBaBCaaCaC
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HCC Global Score (TPRM)
xxxx
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HCCConstruction
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Vulnerabilities
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Findings

HCC
HCCWeak
Current Score
692B (WEAK)
01000
1 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
JULY 2026
696Before Incident
JUNE 2026
696Before Incident
MAY 2026
694Before Incident
APRIL 2026
693Before Incident
MARCH 2026
692Before Incident
FEBRUARY 2026
691Before Incident
JANUARY 2026
690Before Incident
DECEMBER 2025
689Before Incident
NOVEMBER 2025
687Before Incident
OCTOBER 2025
686Before Incident
SEPTEMBER 2025
685Before Incident
AUGUST 2025
684Before Incident
JUNE 2025
752Before Incident
Breach
19 Jun 2025 • HCC
Hamilton Construction Co.

Hamilton Construction Co. Data Breach (2025)

680After Incident
CRITICAL-72
HAM2994229111825
On June 19, 2025, Hamilton Construction Co. suffered a cybersecurity breach exposing sensitive data of 610 Washington residents, including current and former employees. The unauthorized access compromised personally identifiable information (PII)—such as Social Security numbers, driver’s license/ID details, full dates of birth, passport numbers, taxpayer IDs, and financial/banking data—as well as protected health information (PHI), including health insurance policy numbers and medical records.The breach, disclosed to the Washington Attorney General’s office on November 12, 2025, followed a months-long investigation confirming the incident originated from suspicious network activity. The exposure of PII and PHI heightens risks of identity theft, financial fraud, and medical fraud for affected individuals. In response, Hamilton secured its systems, notified impacted parties, and offered 12 months of free credit monitoring and identity restoration services via Epiq. A dedicated call center was also established to assist victims.The breach underscores severe vulnerabilities in employee data protection, with long-term reputational and financial repercussions for the company and affected individuals.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
Personally Identifiable Information (PII)Protected Health Information (PHI)Brand Reputation Impact: Potential risk due to exposure of sensitive employee dataIdentity Theft Risk: High (due to exposure of SSN, driver’s license, financial info, etc.)Payment Information Risk: High (financial/banking information exposed)
DATA BREACH
NameSocial Security numberDriver’s license or Washington ID card numberFull date of birthPassport numberTaxpayer identification numberFinancial or banking informationHealth insurance policy or ID numbersMedical informationNumber Of Records Exposed: 610Sensitivity Of Data: High (PII and PHI)Data Exfiltration: Likely (files accessed by unauthorized party)
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