Harvard Law School
JD, 1991, cum laude

Williams College
BA, 1987, magna cum laude, Phi Beta Kappa



New York


Practice Areas


US District Court for the Southern District of New York

Publications & Events

Choate Ranked in Seven Practice Areas in 2017 Legal 500 US

Eleven Choate Attorneys Honored on "Who's Who" Legal List

David Attisani Honored as “Thought Leader” by Who’s Who Legal

Chambers USA 2017 Recognizes Choate Lawyers and Practices

David Attisani Named to Inaugural Legal 500 Hall of Fame

Choate, Hall & Stewart Receives Top National Rankings from The Legal 500 in Six Practice Areas

David Attisani of Choate, Hall & Stewart Named "Most Highly Regarded" Attorney in Who's Who Legal: Insurance & Reinsurance

Choate Receives Top Chambers USA Rankings for 10 Practice Areas and 30 Attorneys

Choate Has 52 Attorneys Selected for 2016 Best Lawyers in America

David Attisani Named Elite “Leading Insurance Lawyer” for Fifth Consecutive Year by The Legal 500

Choate Receives Top National Rankings from The Legal 500 in Seven Practice Areas

Joan Lukey Named Elite “Leading Trial Lawyer” for Second Consecutive Year by The Legal 500

Choate Receives Top Chambers USA Rankings for 10 Practice Areas and 27 Attorneys

David Attisani on Construction Defects in Law360

David Attisani Participates in Interactive Who’s Who Roundtable

David Attisani on Coverage for Construction Defects in Mealey's

David Attisani Speaks on Post-Settlement Allocation Law

David Attisani Profiled in Insurance Law360

David Attisani Speaks on Trends in Reinsurance Arbitration Selection

2013 Best Lawyers in America

David Attisani and J.P. Jaillet Speak at Claims Conference

David Attisani Speaks at Key Event for Claims Professionals

David Attisani Named Elite “Leading Insurance Lawyer” by The Legal 500

David Attisani and Robert Kole Speak on Arbitration vs. Litigation in Reinsurance Disputes

David Attisani Speaks on Cyber Liability at International Conference

David Attisani Gives an Outlook on Reinsurance Risks for 2012

David Attisani Serves as Reinsurance Editor for Appleman Insurance Treatise

David Attisani Quoted on Cyber Coverage Disputes in Law360

David Attisani Named Elite Insurance Lawyer

David Attisani on Managing Discovery in Arbitration

David Attisani Speaks on Proactively Managing Discovery

David Attisani Quoted on Key 2010 Insurance & Reinsurance Rulings

David A. Attisani Named One of the 10 Most Admired Insurance Attorneys

David Attisani on Issues Surrounding Arbitration Panel Selection

David Attisani Speaks on International Insurance and Reinsurance Issues

Choate Sponsors Insurance & Reinsurance Conference

David Attisani Profiled in Law360 Q&A

John Nadas Speaks on Common Issues That Arise During Hearings

David Attisani Speaks on the Future of Claims

David Attisani on the Extent of an Arbitrator's Power

David Attisani Published in The ARIAS Quarterly

David Attisani Moderates Roundtable Discussion of Insurance & Reinsurance Issues

David Attisani on the Catastrophe Market

David Attisani on Current Landscape of Reinsurance

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    Over one-third of equity partners and majority of practice areas recognized for excellence.

David A. Attisani


t 617-248-5271   f 617-248-4000

“receives praise from across the board for his reinsurance and insurance expertise.  Clients say he is phenomenal on his feet … his presentation style and trial skills are incredible”

Chambers USA

“a seasoned litigator … an extremely effective reinsurance dispute lawyer, skillful and able to provide a responsive service and imaginative advice”

The Legal 500

David Attisani is a partner of the firm’s Insurance & Reinsurance Group, one of the leading practices of its kind in the US, which is top-ranked by Reactions (#1 reinsurance and litigation firm in 2012) and by The 2013 Legal 500 guide to preeminent law firms. He is also co-chairman of the ABA’s Reinsurance Subcommittee and a member of the ARIAS-US Education Committee (2013-present).

Mr. Attisani was the first-ever Boston-area attorney to be recognized in the Chambers USA nationwide rankings for Insurance/Reinsurance (2014-2017).  He was also named one of Law360's "10 Most Admired Insurance Attorneys in America" for 2010—out of 1,016 nominations from 100 firms.  He is one of only 12 reinsurance lawyers listed in The 2016 and 2017 Legal 500’s elite “Leading Lawyers” category, a designation he also received in 2015, 2012 and 2011. Mr. Attisani was also elected to Best of the Best USA (2009-2014) in Insurance & Reinsurance, which recognizes only 30 US industry professionals. In 2017, he was named as a global “Thought Leader” in the field of Insurance and Reinsurance by Who’s Who Legal. Mr. Attisani was ranked number four on the prestigious list and is the youngest member of this year’s esteemed group. In 2016, Mr. Attisani was one of only 5 US insurance and reinsurance attorneys to be named “Most Highly Regarded” in the 13th annual edition of Who’s Who Legal: Insurance & Reinsurance  (he is also one of 15 in the world). He was also elected to the World’s Leading Insurance and Reinsurance Lawyers (2006-2017). Mr. Attisani is listed in Best Lawyers in America for Insurance Law (2012-2017) and as a Massachusetts Super Lawyer.

Mr. Attisani is also a fellow in the American College of Coverage and Extracontractual Counsel, a group of preeminent insurance and reinsurance lawyers in the US and Canada. Membership is obtained by nomination only and is limited to 1,000 lawyers with at least 15 years of experience.

Practice Focus

Insurance & Reinsurance Litigation:  insurance coverage and reinsurance arbitration and litigation on behalf of reinsurers, cedents and intermediaries; risk management; alternative dispute resolution; coverage arbitration and litigation for insurance companies involving financial issues, environmental damage, E&O/D&O, variable annuities, asbestos, 9/11 losses, clergy abuse claims, toxic tort and health risks (Obamacare).

Representative Engagements

  • Currently represent top reinsurer in well-publicized dispute involving fungal contamination allegedly attributed to pharma products.
  • Currently serve as lead counsel in the “Big Dig”/Central Artery Connector coverage litigation.
  • Currently represent top cedent in connection with clergy abuse claims.
  • Currently represent domestic reinsurer in $100M property/captive reinsurance dispute.
  • Currently represent top 10 global reinsurer in connection with losses emanating from allegations of sexual abuse by clergy.
  • Currently represent domestic cedent in connection with losses emanating from the financial crisis.
  • Recently and successfully represented top reinsurer in connection with World Trade Center (9/11) losses.
  • Recently and successfully represented major US ceding company in connection with World Trade Center (9/11) losses.
  • Recently and successfully represented domestic cedent in connection with claims involving the Boy Scouts of America.
  • Recently and successfully represented top reinsurer in $100M dispute involving treaty’s mechanism for “special acceptances.”
  • Recently and successfully represented domestic reinsurer in dispute over cover for unallocated expenses.
  • Recently and successfully represented domestic cedent in aggregation dispute involving food-related injuries.
  • Recently and successfully represented domestic cedent with respect to claims emanating from large asbestos losses.
  • Recently and successfully represented London insurer in coverage dispute adverse to California and English policyholders.
  • Recently and successfully represented top US cedent in dispute over declaratory judgment expenses.
  • Recently and successfully represented MGA in contract wording dispute.
  • In 2010-2011, represented 14 different reinsurers located in Japan, Germany, France, the United Kingdom, and the United States in domestic litigation involving ECO, XPL, and allocation disputes.
  • In June 2010, obtained summary adjudication award for Top 10 reinsurer in net retention dispute.
  • Successfully represented major domestic cedent in three arbitration matters and collected more than $60M in principal reimbursements, plus interest, from 2006-2008.
  • Argued summary judgment on behalf of Swiss Re in the US District Court for the District of Massachusetts in 2003 and in the US Court of Appeals for the First Circuit in 2005. 
    Commercial Union Ins. Company. v. Swiss Reinsurance America Corporation
  • Obtained dismissals for two Bermudan MGA’s in the US District Court for the Southern District of New York and Second Circuit in 2000-2001. 
    Odyssey Re (London) Limited v. Stirling Cooke Brown Holdings Limited (“Sphere Drake”).
  • Successfully represented Hartford affiliate on appeal of fraudulent inducement/RICO decision. 
    Compagnie de Reassurance d’Ile de France. v. New England Reinsurance Corporation
    , 1st Cir. 1995.

Publications and Presentations

Mr. Attisani is the 2012 reinsurance editor of the Appleman Insurance treatise.  He has served on the faculty at ARIAS-US (a leading trade association for the insurance and reinsurance arbitration industry), the Excess & Surplus Lines Claims Association (now, IACP), Mealey’s Reinsurance, ABIR (Association of Bermuda Insurers & Reinsurers), the ABA Insurance Coverage Litigation Midyear Meeting, Perrin Conferences (London 2012), the PWC/Hawksmere Reinsurance Congress (Bermuda) and other seminars.  Mr. Attisani co-chaired the Spring 2012 ARIAS Meeting in Palm Beach, Florida, and the Fall 2006 ARIAS Meeting in New York City.  He has been quoted in various trade publications and written several articles, including:

Professional and Community Involvement

Mr. Attisani served as a special prosecutor in the Suffolk County (City of Boston) District Attorney’s Office, where he tried 19 cases to verdict.  He is a member of the New York, Massachusetts, Colorado and American Bar Associations.


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