Whitney Gagnon

A founding shareholder of the firm, Michael leads the Litigation Practice Group, specializing in business and commercial litigation matters, defense of medical malpractice actions, and advising medical doctors and practices in a variety of legal matters. He is an accomplished trial lawyer in New Hampshire and Massachusetts state and Federal courts, and brings extensive experience to the investigation, evaluation, settlement or trial of major cases. Michael is a skilled litigator, effective ne...

James "Jim" Shirley is a senior member of the litigation department and serves as the firm’s general counsel. He has successfully handled litigated cases in state and federal court in New Hampshire and in neighboring jurisdictions for over 35 years. Over time, he has focused on matters involving commercial disputes, professional negligence, product liability, toxic torts, real estate and insurance coverage. In addition, Jim has been active throughout his career in promoting lawyer conti...

Mark Knights is a member of the Government Investigations & White Collar Defense practice group and lead of the Global Compliance & Investigations team. He represents individuals and businesses across a variety of industries in connection with matters involving the Foreign Corrupt Practices Act, the Anti-Kickback Statute, the False Claims Act, and other federal and state laws. Prior to joining Nixon Peabody, Mark served as a law clerk for Judge Mary Beck Briscoe of the U.S. Court of A...

Gareth Orsmond focuses his practice on commercial real estate, land use, environmental, and energy matters in Massachusetts and New Hampshire. His practice encompasses transactional work, permitting, and litigation. Gareth started his career as an environmental and land use lawyer before building his commercial transactional practice. This background enables him to negotiate and implement complex real estate deals while resolving challenging environmental and land use issues.

J. Daniel Marr is a lawyer recognized by Best Lawyers in the practice areas of Commercial Litigation and Corporate Law. J. Daniel practices law in Nashua, New Hampshire Best Lawyers has recognized J. Daniel Marr since 2020. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which J. Daniel Marr is held by other lawyers.

David P. Eby is a lawyer recognized by Best Lawyers in the practice areas of Appellate Practice and Litigation - Trusts and Estates. David P. practices law in Manchester, New Hampshire Best Lawyers has recognized David P. Eby since 2017. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which David P. Eby is held by other lawyers.

Eric T. Kilchenstein is an attorney with Sheehan Phinney Bass & Green PA in Portsmouth, New Hampshire. His practice includes Commercial Transactions / UCC Law, where he advises clients on a range of business and commercial matters. Eric has been recognized by Best Lawyers in the area of Commercial Transactions / UCC Law since 2026. Best Lawyers recognition is based on a peer-review process involving attorneys in the same geographic region and practice area, reflecting the professional reg...

Andrew Share is a partner in Nixon Peabody's Corporate and M&A practice and serves as Managing Partner of Nixon Peabody's Manchester, NH office. A trusted advisor to clients ranging from innovative startups to Fortune-ranked global enterprises, Andrew has built an exceptional reputation for delivering sophisticated, business-focused legal solutions across complex corporate transactions, technology commercialization, and strategic supply chain matters. Corporate Experience : Andrew provide...

I chair our firm’s Mergers & Acquisitions Team of 15 transactional attorneys and tax specialists and assist our firm clients with regard to achieving their estate planning objectives. Having more than 30 years’ experience as an M&A attorney and corporate advisor, combined with being a CPA and having a master’s degree in taxation, provides me with a unique background and perspective to advise the firm’s business clients in achieving their goals in the most timel...

Matt Serge is the Practice Group Leader for the Municipal Group in New Hampshire. He focuses his practice on serving the legal needs of towns and cities on the full spectrum of municipal law issues including land use matters, zoning enforcement actions, New Hampshire’s Right to Know Law, welfare assistance, tax abatements, real estate, elections, contracts, employment matters, and government relations. Matt regularly represents clients before state and federal trial and appellate courts...