Insights

Strong Market Position Marshall Dennehey is a well-established law firm with nearly 500 attorneys across 19 offices, serving a broad range of clients including insurers, self-insured businesses, and professionals. Its substantial workforce and geographic reach position it as a dominant player in the legal services market, which could translate into opportunities for technology and service providers aiming to support large, multi-office operations.

Recognition & Leadership The firm has received prestigious awards such as Litigation Department of the Year for Professional Liability and Appellate Law, highlighting its reputation for excellence and leadership in the legal industry. This recognition can be leveraged to promote advanced legal technology, legal research tools, or professional development services tailored to high-performing law firms.

Growth & Talent Expansion Recent hires of experienced professionals and promotions indicate an active focus on talent acquisition and growth. Business opportunities exist in providing employee training, HR solutions, or legal staffing services to support their expanding team and maintain high service standards.

Technology Adoption Marshall Dennehey utilizes a diverse tech stack including Nintex, MariaDB, and Nginx, indicating a commitment to modern, efficient workflows. Technology vendors specializing in case management, document automation, or cybersecurity could find opportunities to enhance or integrate with their existing infrastructure.

Revenue Scale With revenue estimated between $100 million and $1 billion, the firm offers significant potential for tailored enterprise solutions in legal analytics, compliance, or cost-management services, particularly for supporting their complex litigation and data security needs across multiple jurisdictions.

Similar companies to Marshall Dennehey

Marshall Dennehey Tech Stack

Marshall Dennehey uses 8 technology products and services including Dropbox, OneDrive, Angular, and more. Explore Marshall Dennehey's tech stack below.

  • Dropbox
    Digital Asset Management
  • OneDrive
    File Sharing
  • Angular
    Javascript Frameworks
  • Cisco Catalyst
    Network Hardware
  • Pantheon
    Platform As A Service
  • X-XSS-Protection
    Security
  • Adobe Creative Suite
    Visualisation Software
  • X-UA-Compatible
    Web Tools And Plugins

Media & News

Marshall Dennehey's Email Address Formats

Marshall Dennehey uses at least 2 format(s):
Marshall Dennehey Email FormatsExamplePercentage
FLast@mdwcg.comJDoe@mdwcg.com
67%
FMLast@mdwcg.comJMDoe@mdwcg.com
12%
FiLast@mdwcg.comJoDoe@mdwcg.com
8%
First.Last@mdwcg.comJohn.Doe@mdwcg.com
5%
FirstL@mdwcg.comJohnD@mdwcg.com
3%
FirstLast@mdwcg.comJohnDoe@mdwcg.com
3%
FirLast@mdwcg.comJohDoe@mdwcg.com
1%
First@mdwcg.comJohn@mdwcg.com
1%
First.Last@marshalldennehey.comJohn.Doe@marshalldennehey.com
94%
First@marshalldennehey.comJohn@marshalldennehey.com
3%
Last@marshalldennehey.comDoe@marshalldennehey.com
2%
FLast@marshalldennehey.comJDoe@marshalldennehey.com
1%

Frequently Asked Questions

Where is Marshall Dennehey's headquarters located?

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Marshall Dennehey's main headquarters is located at 2000 Market Street, 23rd Floor, Philadelphia, PA 19103, US. The company has employees across 4 continents, including North AmericaAfricaAsia.

What is Marshall Dennehey's phone number?

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You can contact Marshall Dennehey's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Marshall Dennehey's official website and social media links?

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Marshall Dennehey's official website is marshalldennehey.com and has social profiles on LinkedIn.

How much revenue does Marshall Dennehey generate?

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As of October 2025, Marshall Dennehey's annual revenue is estimated to be $125M.

What is Marshall Dennehey's SIC code NAICS code?

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Marshall Dennehey's SIC code is 8111 - Legal Services NAICS code is 54111 - Offices of Lawyers.

How many employees does Marshall Dennehey have currently?

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As of October 2025, Marshall Dennehey has approximately 1.2K employees across 4 continents, including North AmericaAfricaAsia. Key team members include Chief Executive Officer: J. S.Chief Executive Officer And Founder: J. W.Chief Financial Officer: F. S. S.. Explore Marshall Dennehey's employee directory with LeadIQ.

What industry does Marshall Dennehey belong to?

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Marshall Dennehey operates in the Law Practice industry.

What technology does Marshall Dennehey use?

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Marshall Dennehey's tech stack includes DropboxOneDriveAngularCisco CatalystPantheonX-XSS-ProtectionAdobe Creative SuiteX-UA-Compatible.

What is Marshall Dennehey's email format?

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Marshall Dennehey's email format typically follows the pattern of FLast@mdwcg.com. Find more Marshall Dennehey email formats with LeadIQ.

When was Marshall Dennehey founded?

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Marshall Dennehey was founded in 1962.
Marshall Dennehey

Marshall Dennehey

Law PracticeUnited States1001-5000 Employees

Welcome to our company page! Founded in 1962 and headquartered in Philadelphia, PA, Marshall Dennehey, P.C. is a leading civil defense litigation law firm that represents and advises insurers, self-insured businesses, and professionals in a wide range of professional liability, casualty, health care, employment, and workers' compensation matters. 

With nearly 500 attorneys in 19 offices throughout PA, NJ, DE, CT, OH, NY & FL Marshall Dennehey is uniquely positioned to assist clients in both avoiding litigation, as well as providing them with a vigorous defense in the event of claims and suits made against them. 

Practice areas include:
Amusements, Sports and Recreation
Appellate / Post-Trial Advocacy
Architects & Engineers and Construction Defect
Automobile Liability
Aviation and Complex Litigation
Class Action Litigation
Consumer and Credit Law
Employment Law
Environmental & Toxic Tort
Fraud/Special Investigation
General Liability
Health Care Liability
Hospitality Liability,
Insurance Coverage/Bad Faith
Life, Health and Disability
Long Term Care Liability,
Maritime Litigation,
Medical Device and Pharmaceutical
Medicare Set-Aside
Privacy and Data Security
Product Liability
Professional Liability
Property Litigation
Public Entity and Civil Rights
Real Estate E&O Liability
Retail Liability
School Leaders' Liability
Securities and Investment Professional Liability
Technology, Media, and Intellectual Property Litigation
Trucking & Transportation 
White-Collar Crime
Workers' Compensation

Section iconCompany Overview

Headquarters
2000 Market Street, 23rd Floor, Philadelphia, PA 19103, US
Phone number
SIC Code
8111 - Legal Services
NAICS Code
54111 - Offices of Lawyers
Founded
1962
Employees
1001-5000

Section iconFunding & Financials

  • $250M$500M

    Marshall Dennehey's revenue is estimated to be in the range of $250M$500M

Section iconFunding & Financials

  • $250M$500M

    Marshall Dennehey's revenue is estimated to be in the range of $250M$500M

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