Sean C. Griffin
Member
1629 K Street NW, Suite 300
Washington, DC 20006
| Office: | 202.836.7828 |
| Fax: | 301.291.5028 |
| Email: | [email protected] |
Practice Area:
At Longman & Van Grack, Sean C. Griffin leverages his extensive background in litigation, commercial, and business law to provide clients with effective legal solutions.
As a Member at Longman & Van Grack, Sean Griffin leverages his extensive litigation, commercial, business, and cybersecurity expertise to help clients resolve complex civil litigation matters, address contract and fraud disputes, protect their data and privacy, and comply with government regulations. Sean has 30+ years of experience representing various organizations, including insurance companies, government contractors, construction companies, and law firms in federal and state courts across the country. Sean is a Certified Information Privacy Professional (CIPP/US), a certified Artificial Intelligence Governance Professional (AIGP), and a frequent speaker and author on data security and privacy issues. Additionally, the firm is a Member of the Maryland Building Industry Association (MBIA) as well as the National Association of Home Builders (NAHB), and Sean speaks and writes frequently about activities and changes in laws which address the commercial and home building industry.
In addition to his litigation expertise, Sean helps clients comply with cybersecurity laws and manage their artificial intelligence initiatives. Sean is a Certified Information Privacy Professional (CIPP/US), and in 2025, he became one of the world’s first certified Artificial Intelligence Governance Professionals (AIGP). He speaks regularly at industry events and bar association meetings around the country about legal issues surrounding cybersecurity, privacy, and artificial intelligence.
Sean began his legal career with a government contracts firm, followed by a period as a clerk for the U.S. District Court for the District of Maryland. Later, Sean joined the U.S. Department of Justice, Civil Division, as a trial attorney, where he handled commercial litigation trials and appeals, as well as government contract and construction litigation. After the Department of Justice, Sean became defense and coverage counsel for insurance companies around the country and began addressing about cybersecurity (then called “information security”).
Sean is currently the Secretary-Treasurer of the Federation of Defense & Corporate Counsel (“FDCC”) and will assume the FDCC’s presidency in July 2027. He also chairs the AI Committee of the International Association of Defense Counsel and the Artificial Intelligence Steering Committee of the Association of Defense Trial Attorneys (“ADTA”). Sean also serves as a Vice Chair on DRI’s Center for Law and Public Policy. Additionally, Sean is a member of the International Association of Defense Counsel (“IADC”), where he Co-Chairs the AI Committee and serves as a Vice Chair of the Cyber Security, Data Privacy and Technology Committee. Sean is also a member of the Association of Defense Trial Attorneys (“ADTA”), where he Chairs the Artificial Intelligence Steering Committee.
Honors & Distinctions
- Certified Information Privacy Professional (CIPP/US)
- Certified Artificial Intelligence Governance Professional (AIGP)
- Secretary-Treasurer, Federation of Defense & Corporate Counsel
- Chair, Artificial Intelligence Committee, International Association of Defense Counsel
- Chair, Artificial Intelligence Steering Committee, Association of Defense Trial Attorneys
- Vice Chair, Cyber Security, Data Privacy and Technology Committee, International Association of Defense Counsel
- Artificial Intelligence Task Force, DRI
- Vice-Chair, Center for Law and Public Policy, DRI
- Diversity Award, Federation of Defense & Corporate Counsel, 2023
- G. Duffield Smith Outstanding Publication Award, DRI, 2017
Education
- J.D., Columbia Law School
- B.A. Harvard University
Bar Admissions
- State of Maryland
- Supreme Court of Maryland
- Appellate Court of Maryland
- District of Columbia
- District of Columbia Court of Appeals
- Virginia
- Supreme Court of Virginia
- United States District Court for the District of Columbia
- United States District Court for the District of Maryland
- United States District Court for the Eastern District of Virginia
- United States District Court for the Western District of Virginia
- United States Court of Appeals for the Fourth Circuit
- United States Court of Appeals for the Federal Circuit
Representative Matters
- Obtained settlement in Virginia matter regarding a home improvement construction matter.
- Managed nationwide litigation for a major national insurance company
- Defended law firm against major employment discrimination matte
- Defended government contract construction litigation regarding buildings in Alabama and Illinois
- Represented government contract supplier regarding vendor supply issues.
- Represented company CEO in derivative contract/fraud litigation
- Represented major US presidential campaign in emergency injunction proceedings to regain access to voter database.
- Represented insurance company in government fraud litigation
- Represented government contractor in Court of Federal Claims copyright litigation
- Represented various government subcontractors in construction dispute with both prime and subcontractors
- Represented cable television company in multi-party contract litigation
- Defended government contractor in litigation involving helicopter repair
- Defended government subcontractor in construction litigation
- Represented government subcontractor in payment dispute with prime contractor subcontract
- Defended fraud claim before American Arbitration Association (“AAA’) regarding contract for the provision of telecommunication services to India, including allegations of fraud
- Obtained favorable settlement on behalf of client investor on the basis of misrepresented net worth and liquidity requirements
- Obtained favorable settlement in dispute before AAA on pharmaceutical company’s behalf regarding rebates due to client for drug sales.
- Represented investment adviser firm in SEC investigation regarding departing partner’s misappropriation of fund
- Investigation of False Claims Act allegations regarding Buy American Act violations, including response to and successful resolution of associated DOJ investigation
- Represented wind power companies in payment dispute litigation