MMMCA Data Breach Exposes Sensitive Information of Over 25,000 Individuals
Shamis & Gentile P.A., a class action law firm specializing in data breach cases, is investigating a cybersecurity incident involving the Metropolitan Marine Maintenance Contractors' Association (MMMCA), a New Jersey-based trade association representing marine maintenance employers in the Port of New York and New Jersey.
MMMCA, a not-for-profit organization that negotiates labor contracts for its 21 member companies, discovered the breach on April 11, 2026. The exposed data includes highly sensitive information, such as Social Security numbers, government ID numbers, financial account details, credit/debit card information, health records, and biometric data.
The breach was officially reported to the Maine and Vermont Attorneys General on May 25, 2026, with notifications sent to affected individuals on May 22, 2026. A total of 25,528 people across the U.S. were impacted, including one resident of Maine and two in Vermont.
Legal representatives are reviewing potential claims for compensation related to damages, credit monitoring costs, and other losses stemming from the incident. The investigation remains ongoing.
Source: https://www.claimdepot.com/investigations/mmmca-data-breach-2026
Milwaukee Metropolitan Sewerage District cybersecurity rating report: https://www.rankiteo.com/company/milwaukee-metropolitan-sewerage-district
"id": "MIL1779906650",
"linkid": "milwaukee-metropolitan-sewerage-district",
"type": "Breach",
"date": "4/2026",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"{'affected_entities': [{'customers_affected': '25,528',
'industry': 'Marine Maintenance',
'location': 'New Jersey, USA',
'name': "Metropolitan Marine Maintenance Contractors' "
'Association (MMMCA)',
'type': 'Trade Association'}],
'customer_advisories': 'Notifications sent to affected individuals on May 22, '
'2026',
'data_breach': {'number_of_records_exposed': '25,528',
'personally_identifiable_information': 'Yes',
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Social Security numbers',
'Government ID numbers',
'Financial account details',
'Credit/debit card information',
'Health records',
'Biometric data']},
'date_detected': '2026-04-11',
'date_publicly_disclosed': '2026-05-22',
'description': 'Shamis & Gentile P.A. is investigating a cybersecurity '
'incident involving the Metropolitan Marine Maintenance '
"Contractors' Association (MMMCA), a New Jersey-based trade "
'association representing marine maintenance employers in the '
'Port of New York and New Jersey. The breach exposed highly '
'sensitive information, including Social Security numbers, '
'government ID numbers, financial account details, '
'credit/debit card information, health records, and biometric '
'data.',
'impact': {'data_compromised': 'Sensitive personal and financial information',
'identity_theft_risk': 'High',
'legal_liabilities': 'Potential claims for compensation related to '
'damages, credit monitoring costs, and other '
'losses',
'payment_information_risk': 'High'},
'investigation_status': 'Ongoing',
'references': [{'source': 'Shamis & Gentile P.A. Investigation'}],
'regulatory_compliance': {'legal_actions': 'Potential claims for compensation',
'regulatory_notifications': ['Maine Attorney '
'General',
'Vermont Attorney '
'General']},
'response': {'communication_strategy': 'Notifications sent to affected '
'individuals on May 22, 2026',
'third_party_assistance': 'Shamis & Gentile P.A. (legal '
'investigation)'},
'title': 'MMMCA Data Breach Exposes Sensitive Information of Over 25,000 '
'Individuals',
'type': 'Data Breach'}