Mr. Sheehan, a partner, practices in the firm's Boston, Massachusetts office.  Mr. Sheehan's practice focuses on class actions, health care law, insurance law and issues relating to information security.  As part of his practice, Mr. Sheehan represents businesses, professionals, professional associations and consumers in litigation pending throughout the country.  Currently, in In Re TJX Companies Retail Security Breach Litigation, pending in the District of Massachusetts, a team of WDK attorneys including Mr. Sheehan serve as co-lead counsel for a proposed class of financial institutions who were injured when their customers' payment card accounts were compromised in the largest data breach in retail history.

Mr. Sheehan contributes regularly to publications for continuing legal education programs.  Mr. Sheehan is the co-author of "Class Actions In The Healthcare Context," which was published for the following legal conferences: "Class Action Health Care Litigation," ALI-ABA Health Care Law and Litigation Conference, 1999; "Class Actions: HMO and Health Care Providers Under Attack," ALI-ABA Life and Health Insurance Litigation Conference, 2000; "Providers (Suits by Doctors and Hospital Class Actions)," ALI-ABA Health Care Law and Litigation Conference, 2000; "The Application of ERISA and RICO Theories in the Age of Managed Care," The Judges and Lawyers Breast Cancer Alert, 2000; and "Health Care Litigation: What You Need to Know After Pegram," Practicing Law Institute, 2000. Mr. Sheehan is also the co-author of "An Overview of Class Action Litigation In the Managed Care Context," which was published for the following legal conferences: "Provider Suits by Doctors and Hospitals v. HMOs," ALI-ABA Health Care Law and Litigation Conference, 2001 and American Society of Medical Associations Counsel, Fall 2002.

Mr. Sheehan is a member of the Massachusetts and New York bars and is admitted to practice before the United States District Courts for the District of Massachusetts and the Southern and Eastern Districts of New York. 

Mr. Sheehan is a graduate of the College of the Holy Cross (B.A., 1993) and Northeastern University School of Law (J.D., 1997), where he was an editor of the NU Forum, the school's law journal. He is a member of the American Bar Association, the American Association for Justice, the Massachusetts Bar Association, the Massachusetts Academy of Trial Attorneys and the Boston Bar Association.   Mr. Sheehan also serves on the Board of Directors of the Holy Cross Lawyers Association.