R. David DePuy headshot
900 Elm Street
10th Floor
Manchester, NH 03101
Tel: 603 628 1345

R. David DePuy

Director, Litigation Department

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Dave is one of the firm's most experienced litigators, having tried dozens of jury trials and many, many trials to a judge. While having tried noteworthy business litigation and personal injury/medical malpractice disputes (Dave has two of the largest medical malpractice verdicts in the state), the majority of his practice is handling divorce matters. He recently has successfully resolved through trial, mediation or settlement many divorces involving substantial assets, trusts, businesses owned by the parties, large real estate holdings, and corporate stock interests.

Dave also has extensive experience drafting and reviewing prenuptial agreements (antenuptial agreements) and more recently has engaged in negotiating and drafting postnupital agreements with regards to divorce and death.

He is a past president of the New Hampshire Trial Lawyers Association and is a member of the American Board of Trial Advocates and the International Society of Barristers.

Dave received his J.D. degree from Boston University Law School (1969), where he was a Member of the Boston University Law Review (1967-1969) and received his A.B. from Lehigh University (1966).

Areas of Focus

  • Family Law/Domestic Relations
  • Personal Injury Litigation
  • General Civil Litigation
  • Medical Malpractice


Admitted to the New Hampshire Bar Association 1971, California Bar Association 1970 (inactive), United States District Court for the Central District of California (1971), United States District Court for the District of New Hampshire 1971, United States Court of Appeals, First Circuit 1983, United States Supreme Court 1976.

Dave served as the 13th President of the New Hampshire Trial Lawyers Association (1989-1990) and was the New Hampshire State Delegate to the Association of Trial Lawyers of America from 1991-1997.

He is a member of the American Board of Trial Advocates (President of the New Hampshire Chapter 1999-2000), the International Society of Barristers, the American Bar Association, the New Hampshire Bar Foundation, and the Association of Trial Lawyers of America.


  • Best Lawyer of America 2020 (Family Law, Family Law Mediation, Medical Malpractice Law - Plaintiffs, Personal Injury Litigation - Plaintiffs
  • Dave was the recipient of the Board of Governors Award in 1998 by the New Hampshire Trial Lawyers Association, and the President's Award in 1990.
  • Dave is recognized in Woodward/White's Best Lawyers in America®, (Family Law, Personal Injury Litigation)
  • Recipient of the Manchester Bar Association's Lifetime Achievement Award - 2006
  • Recipient of the New Hampshire Bar Association's E. Donald Dufresne Award for Outstanding Professionlism - 2016
  • AV Peer Review Rated, Martindale-Hubbell
  • Fellow, New Hampshire Bar Foundation
  • New England Super Lawyer


  • Raymond Area Rotary Club, Member
  • Active in the United Way.
  • Member, Board of Directors of New Hampshire Public Defender (1986-2009).
  • Fellow, International Society of Barristers.
  • Advocate, American Board of Trial Advocates.
  • Member, New Hampshire Association for Justice.
  • Past President, New Hampshire Trial Lawyers Association.
  • Selectman, Town of Candia (2012 - 2015).
  • Legal Advisor, Manchester Black Scholarship Foundation

Practice Areas

The strengths of our practice groups and the industries we serve make McLane Middleton one of the most diverse law firms in New England.

Integrity and trust

At McLane Middleton we establish and maintain long-standing relationships with our clients to help us better achieve their unique goals over time. This approach to building trust requires that our esteemed lawyers and professionals use their broad, in-depth knowledge and work together with integrity to ascertain sound resolutions to legal matters for their clients.

Strength in numbers

McLane Middleton is made up of more than 105 attorneys who represent a broad range of clients throughout the region, delivering customized solutions. As a firm we are recognized as having the highest legal ability rating. The firm is rated Preeminent by Martindale Hubbell and is recognized as one of the nation's leading law firms in Chambers USA. Our attorneys are distinguished leaders in their respective practice areas.

Meet Our People

Commitment and collaboration

McLane Middleton's versatile group of attorneys and paralegals become trusted authorities on each case through collaboration. We work with our clients to learn their individual needs first and foremost and, together, we develop comprehensive solutions to their specific legal matters. This approach helps us exceed our clients' expectations efficiently and effectively, client by client, case by case.

Practice Areas

A history of excellence

McLane Middleton was established in 1919 in New Hampshire, and has five offices across two states. However, deep historical roots don't allow you to become innate. Our firm is organized, technological, and knowledgeable. Our history means we are recognized. But our reputation is built on the highest quality of service and experience in very specific areas of law.

The Firm

Intelligence paired with action

Our team continuously seeks opportunities to enhance their professional development and put key learnings to action. The pursuit of further insight guides us to volunteer service opportunities, speaking engagements, and teaching roles. Our lawyers are sought after thought leaders across their industries, and recipients of leadership awards throughout the region.