David S. "Dave" Clancy

Jaclyn L. Kugell is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Labor Law - Management. Jaclyn L., who practices law in Boston, Massachusetts, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jaclyn L. is held by other top lawyers in the same geographic and legal practice area.

Mr. McKittrick has extensive trial experience in employment and business disputes. He has represented clients in a wide array of litigation, including (1) allegations of workplace discrimination and harassment; (2) cases involving disputes over trade secrets, non-disclosure, non-competition and non-solicitation covenants in financial services, biotechnology, pharmaceuticals, high technology and other industries; and (3) the defense of class and collective actions, with particular experience i...

Michael S. Hines is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Michael S., who practices law in Boston, Massachusetts, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael S. is held by other top lawyers in the same geographic and legal practice area.

David serves as Managing Partner and is a Tax Partner in Sullivan’s Boston office, bringing over 25 years of experience to his dual roles. Leadership Role As Managing Partner, David collaborates closely with the firm’s Management Committee, partners, and business professionals to advance Sullivan’s vision of becoming a leading global, commercially focused mid-size law firm. He is dedicated to: Cultivating a culture of deep loyalty and high performance Implementing innovative...

Andrea Peraner-Sweet is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Personal Injury Litigation - Defendants. Andrea, who practices law in Boston, Massachusetts, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Andrea is held by other top lawyers in the same geographic and legal practice area.

Tamsin is an employment lawyer and business litigator, and serves as outside general counsel to diverse nonprofits and private schools. She has extensive experience representing businesses, executives and other high-level professionals in a full range of employment-related issues from recruitment through termination. Tamsin frequently conducts workplace investigations, provides trainings on diversity and harassment, and advises employers regarding employee handbooks, employment audits, and wo...

Lisa’s litigation practice spans a broad range of complex environmental, energy, land use, real estate, insurance, and business matters. On behalf of private and public sector clients, she practices in state and federal courts at both the trial and appellate levels. In addition, she handles contested administrative proceedings, alternative dispute resolution matters, and sensitive regulatory compliance negotiations. She co-chairs the firm’s Environmental and Energy Law and Real Es...

Matthew J. Connolly is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Matthew J., who practices law in Boston, Massachusetts, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Matthew J. is held by other top lawyers in the same geographic and legal practice area.

Michael T. Maroney is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Michael T., who practices law in Boston, Massachusetts, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael T. is held by other top lawyers in the same geographic and legal practice area.

Marianne LeBlanc is a trial attorney with a proven record of success in the courtroom and over two decades of experience in representing injured clients. With record-setting verdicts in Massachusetts, Marianne’s advocacy skills draw on her commitment to making a difference both for her clients and the community at large. Marianne concentrates in all aspects of serious personal injury litigation, including liquor liability, premises liability, medical malpractice, and nursing home litiga...