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M.C. Dean, Inc.

M.C. Dean, Inc. Vendor Cyber Rating & Cyber Score

mcdean.com

M.C. Dean is Building Intelligence®. We design, build, operate, and maintain cyber-physical solutions for the nation’s most recognizable mission-critical facilities, secure environments, complex infrastructure, and global enterprises.  The company’s capabilities include electrical, electronic security, telecommunications, life safety, automation and controls, audio visual, and IT systems. M.C. Dean is headquartered in Tysons, Virginia and employs more than 7,000 professionals who engineer and deploy automated, secure, and resilient power and technology systems; and deliver the management platforms essential for long-term system sustainability.


MDI A.I CyberSecurity Scoring

MDI
Company Information
Website:https://www.mcdean.com
Employees number:3,359
Number of followers:30,902
NAICS:5414
Industry Type:Design Services
Homepage:mcdean.com
MDI Risk Score (AI oriented)
Between 700 and 749
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MDIDesign Services
Updated:
02/04/2026
707/1000
Moderate
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Powered by our proprietary A.I cyber incident model
Insurance prefers TPRM score to calculate premium
MDI Global Score (TPRM)
xxxx
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MDIDesign Services
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Score locked
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Vulnerabilities
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Findings

MDI
MDIModerate
Current Score
707Ba (MODERATE)
01000
2 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
JUNE 2026
710Before Incident
MAY 2026
708Before Incident
APRIL 2026
708Before Incident
MARCH 2026
707Before Incident
FEBRUARY 2026
706Before Incident
JANUARY 2026
705Before Incident
DECEMBER 2025
704Before Incident
NOVEMBER 2025
703Before Incident
OCTOBER 2025
701Before Incident
SEPTEMBER 2025
700Before Incident
AUGUST 2025
699Before Incident
JULY 2025
698Before Incident
SEPTEMBER 2022
696Before Incident
Breach
01 Sep 2022MDI
M.C. Dean, Inc.

M.C. Dean, Inc. Data Breach

633After Incident
CRITICAL-63
MCD2223141122
M.C. Dean, Inc.suffered a data breach after an unauthorized party gained access to sensitive consumer data contained on M.C. Dean’s network. The breach involved the Social Security numbers, Protected health information, Driver’s license or state identification numbers, or Financial account information of its consumers. M.C. Dean also sent out data breach letters to all affected parties, informing them of the incident.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
Social Security numbersProtected health informationDriver’s license or state identification numbersFinancial account information
DATA BREACH
Social Security numbersProtected health informationDriver’s license or state identification numbersFinancial account informationSensitivity Of Data: High
DECEMBER 2021
761Before Incident
Breach
24 Dec 2021MDI
M.C. Dean, Inc.

Data Breach at M.C. Dean, Inc.

684After Incident
CRITICAL-77
M-C1013072825
The Maine Office of the Attorney General reported a data breach involving M.C. Dean, Inc. on September 14, 2022. The breach, discovered on August 10, 2022, involved unauthorized access to M.C. Dean systems between December 24, 2021, and June 2, 2022, potentially affecting 45,499 residents. Compromised information includes names, Social Security numbers, and driver's license numbers.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
namesSocial Security numbersdriver's license numbers
DATA BREACH
namesSocial Security numbersdriver's license numbersSensitivity Of Data: High

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