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Butler Buchanan III

Managing Attorney, Philadelphia, PA Office; Chair, Diversity Committee; Hiring Attorney
2000 Market Street, Suite 2300
Philadelphia, PA 19103
(215) 575-2661
(215) 575-0856 - Fax

Butler (Buck) Buchanan, III provides significant contributions to the leadership of the firm through his multiple roles as Managing Attorney of the Philadelphia office, Hiring Attorney and Chair of the Diversity Committee.  His years of experience in law practice and involvement and activity in numerous professional, industry and civic organizations provide the backdrop for his ability to successfully juggle these multiple positions.

As Managing Attorney, Buck oversees the operations, functions and initiatives of the firm's 130-attorney Philadelphia office.  In his additional role as Hiring Attorney, he is responsible for the recruitment and hiring of attorneys who join the firm. He also chairs the firm's Diversity Committee where he is charged, along with his colleagues, with ensuring that the firm's deep commitment to equal opportunity employment and advancement is brought to fruition.

Buck is a former Bucks County Deputy District Attorney, and he was engaged in private practice with a defense litigation firm before joining Marshall Dennehey's Professional Liability Department in 1999.  In that capacity, he devoted a significant portion of his law practice to the defense of insurance agents and brokers, securities dealers and attorneys.  He also handled environmental and insurance coverage matters, in addition to generic insurance defense work.

He was promoted to Hiring Attorney in 2003 and to lead the Diversity Committee in 2009. During his tenure with the firm, he has also served two terms on Marshall Dennehey's Board of Directors.

In addition to his various duties for the firm, Buck is active in a number of legal and insurance organizations. He is currently a member of the House of Delegates of the American Bar Association. He is active in the Philadelphia Bar Association, where he has served as Co-Chair of the State-Civil Litigation Committee and as a member of the Commission on Judicial Selection and Retention. He is currently a member of the Large Law Firm Management Committee. He is a current member and a past president of the Philadelphia Association of Defense Counsel and serves on the Board of Directors of the Insurance Society of Philadelphia. He is additionally a member of the Pennsylvania Defense Institute and the Defense Research Institute, where he has served on its Board of Directors.

Buck graduated from Millersville University, cum laude, in 1976, and earned his J.D. from the Duquesne University School of Law in 1979. Devoted to community and civic affairs, he is a former member of the Advisory Board of the Sisters of Saint Joseph Welcome Center and a former member of the Board of Directors of Mercy Vocational High School.

Significant Representative Matters

  • Successfully resolved numerous declaratory judgment actions seeking insurance coverage from numerous insurers wherein plaintiff corporations demanded payment of $100 million(+) to resolve claims seeking environmental coverage, coverage for hearing loss, coverage for asbestos claims, and various other types of claims.

  • Successfully defended case via jury trial wherein plaintiff physician sought several million dollars in coverage for long term disability coverage. Client was the insurance agent that sold the policies in question.

Classes/Seminars Taught

  • Best Practices for Retaining & Promoting Diverse Talent, Philadelphia Diversity Law Group's Diversity & Inclusion Symposium, November 2015

  • Barristers' Association of Philadelphia Leadership Academy, January 2015

  • Do the Right Thing! - Ethical Issues Arising in Litigation, Philadelphia Bar Association Bench-Bar Conference, October 2014

  • "Women in the Profession Roundtable Discussion," participant, The Legal Intelligencer, April 2014

  • Technology and Law, DRI Annual Meeting

  • The Use of E-Mail and Electronic Documents Storage, DRI Annual Meeting

  • Electronic Discovery, DRI Seminar, Chicago, Illinois

  • Insurance Roundtable - Recent Developments Concerning Class Action Litigation, DRI, Chicago, Illinois

  • Insurance Coverage and Practice, DRI Seminar, New York, New York

  • Encouraging Ethics in Civility and Pre-Trial Practice, Pennsylvania Defense Institute, Philadelphia, PA

  • Professionalism and Civility:  Is Civility Still the Rule in Civil Litigation Today? Atlantic City, New Jersey

  • Optimizing Brownfield Liability Recovery Through Insurance Settlement Strategies and Asset Management, Washington, D.C.

  • Lawyers' Professionalism – What Does It Mean in Everyday Practice? Philadelphia, PA

  • Seminars presented for Pennsylvania Institute of Certified Public Accountants, Pennsylvania Bar Institute, Greater Philadelphia Chamber of Commerce, National Insurance Industry Association

Published Works

Defense Digest Article December 4, 2017
Defense Digest, Vol. 23, No. 4, December 2017 By Butler B. Buchanan, III, Esq. The Philadelphia office of Marshall Dennehey Warner Coleman & Goggin is the headquarters of the firm. With 140 attorneys and over 230 non-lawyer employees, this..., Defense Digest, Vol. 23, No. 4, December 2017. Defense Digest is prepared by Marshall Dennehey Warner Coleman & Goggin to provide information on recent legal developments of interest to our readers. This publication is not...
December 4, 2015
Marshall Dennehey Warner Coleman & Goggin is pleased to announce that the firm has received the "Vision Award" from the Young Lawyers Division (YLD) of the Philadelphia Bar Association. The award is presented annually to a law firm that supports the professional development of young lawyers, as...
July 2, 2014
Marshall Dennehey Warner Coleman & Goggin announced today the June 30th retirement of Peter S. Miller, longtime Chief Operating Officer, Chairman of the Board of Directors, Executive Committee member, Director of the Workers' Compensation Department, and Managing Attorney of the Philadelphia...
August 28, 2013
Marshall Dennehey has partnered with the Cristo Rey Philadelphia High School to sponsor the education of four of its students through the school's unique work-study program. Cristo Rey is an independent, Catholic, college preparatory school for students of all faiths who cannot otherwise afford a...
December 17, 2012
Philadelphia, PA – Butler Buchanan, III, a shareholder with Marshall Dennehey Warner Coleman & Goggin, has been appointed Co-Chair of the State Civil Litigation Section of the Philadelphia Bar Association. Buchanan devotes a significant amount of his law practice to the defense of insurance...


  • Duquesne University School of Law (J.D., 1979)
  • Millersville University, (B.A., cum laude, 1976)

Bar Admissions

  • Pennsylvania, 1979

Associations & Memberships

  • American Bar Association
  • Defense Research Institute, Board of Directors, 2001-2004; Pennsylvania State Representative, 1997-2000
  • Hearing Officer, Serving the Disciplinary Board of the Supreme Court of Pennsylvania, 2005-2011
  • Insurance Society of Philadelphia, Member of Board of Directors, 2013 - present
  • Mercy Vocational High School, Board of Directors, 2010-2013
  • Montgomery County Archdiocesan Council on Elementary Education, Member, 2013-2017
  • Pennsylvania Bar Association
  • Pennsylvania Defense Institute
  • Philadelphia Association of Defense Counsel, President, 2000-2001; Member, Executive Committee, 1996-2002
  • Philadelphia Bar Association, Co-Chair of State-Civil Litigation Committee, 2012-2014; Member, Board of Governors, 2004-2006; 2014 - ; Member, Commission on Judicial Selection and Retention, 2012-2014
  • Philadelphia Bar Association, Member, Large Law Firm Management Committee, 2013- present; Chair, Campaign for Qualified Judges, 2015-2016
  • Sisters of St. Joseph Welcome Center Advisory Board Member, 2008 - 2018

Honors & Awards

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