Marshall Dennehey is a civil defense litigation law firm - one of the largest in the U.S. - with approximately 500 attorneys operating across 19 offices in seven states. The firm's client base spans insurers, self-insured businesses, professionals, and municipalities, and it's an Am Law 200 outfit. That kind of scale means handling high-volume, high-stakes legal data across multiple jurisdictions, each with its own regulatory and compliance edge cases.
The firm's work is organized across four departments: Casualty, Professional Liability, Health Care, and Workers' Compensation. For a cybersecurity audience, the relevance sits in the threat surface these domains represent. Health care data carries HIPAA exposure. Workers' comp files intersect with PII and medical records. Professional liability cases often hinge on digital evidence, forensic chain-of-custody, and the integrity of systems that generate or store it. Insurers and municipalities - the firm's core verticals - are frequent ransomware targets and breach disclosure subjects, which means the legal teams here are operating adjacent to incident response whether they call it that or not.
The firm's geographic footprint - Connecticut, Delaware, Florida, New Jersey, New York, Ohio, Pennsylvania - maps onto some of the most active state-level privacy and breach notification regulatory environments in the country. The operational posture is pragmatic and cost-focused: the stated approach is to empower clients with informed decisions about exposure, develop resolution strategies tied to the bottom line, and take things to trial when settlement fails. That kind of posture, at this scale, typically demands disciplined information governance and litigation support infrastructure.
