William devotes his law practice to the defense of professionals including but not limited to architects, engineers, land surveyors, real estate appraisers and real estate and insurance agents and brokers. His matters involve construction defect litigation, real estate errors and omissions, insurance agents and brokers liability, disciplinary board representation and non-profit D&O.
William manages a complex case load of matters involving allegations of design deficiencies, delay damages, standard of care considerations, and breach of contract matters in which he directs and implements a case strategy from inception until conclusion. His practice also involves the representation of architects before the State of New Jersey Board of Architects and engineers and land surveyors before the New Jersey State Board of Professional Engineers and Land Surveyors. He has tried a number of bench and jury trials in which he has secured successful defense verdicts. Additionally, William is the Supervisor for the Northeast Professional Liability Group within our Professional Liability department and supervises and mentors associates who adhere to his proactive approach to the handling of matters to ensure that the interests of our clients are adequately protected at all times and the proper result is obtained.
In 1990 William was awarded his Bachelor of Arts from the University of Scranton. He entered the Widener University School of Law and received his juris doctor in 1993. Following graduation, he clerked for the Honorable Lawrence A. Eleuteri, Sr., Presiding Judge, Civil Division, Burlington County, New Jersey.
Before joining Marshall Dennehey, William was associated with an insurance defense firm for five years, during which time he managed a substantial case load of varying complexity. There he was responsible for all aspects of each case from the filing of the answer through resolution whether by settlement or trial.
Honors & awards
The Best Lawyers in America, Professional Malpractice Law - Defendants
2026
The Best Lawyers in America, Litigation - Construction
2025-2026
The Best Lawyers list is issued by Woodward & White. A description of the selection methodology can be found here . No aspect of this advertisement has been approved by the Supreme Court of New Jersey.
Year joined
2000
Results
Summary Judgment Secured Against Leading Construction Defect Law Firm
Architectural, Engineering & Construction Defect Litigation
September 29, 2023
We obtained a summary judgment on behalf of our architectural client against one of the top construction/design defect law firms in New Jersey. After three separate argument appearances, the court granted summary judgment, holding that the plaintiff’s expert’s report failed to substantively establish a deviation from the architectural standard of care.
Civil Rights Action Against Planning Board Engineer Dismissed.
Public Entity & Civil Rights Litigation
April 11, 2019
The plaintiff, a sophisticated commercial real estate developer, brought constitutional claims against a New Jersey borough and its planning board’s engineer, alleging inverse condemnation and violations of due process relating to a 14-acre property. The plaintiff intended to develop the property into residential units, retail and commercial structures, and a large parking deck.
Thought Leadership
98 Marshall Dennehey Attorneys Recognized in the 2026 Editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America
August 20, 2025
Marshall Dennehey is proud to highlight the firm’s 98 attorneys who have been recognized in the 2026 editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America. Less than 6% of all practicing lawyers in the U.S.
Classes/Seminars Taught
Ethics for Professional Engineers, American Society of Civil Engineers (ASCE) 2021 Annual Meeting, Fairfield, NJ, October 2021
Ethics for Professional Engineers, American Council of Engineering Companies (ACEC) 2021 Fall Conference, Atlantic City, NJ, September 19, 2021
Critical Considerations for the A/E Firm, client webinar, July 2020
Protecting Your Practice-Managing Your Risk of Being Sued, New Jersey Society of Professional Land Surveyors, February 4, 2016
Top 5 Concerns for Design Professionals, client seminar, February 3, 2016
New Jersey Architects, Engineering & Construction Defect Issues, Marshall Dennehey Client Seminar, July 2015
Risk Strategy, Joint Meeting of the NJSPLS North Jersey Chapter and the Engineers and Surveyors Association of Bergen Passaic, May 2015
Things You Never Learned in School About Working as a Designer: From Social Media Liability to Site Safety, American Institute of Architects Convention, June 2014
Minimizing Risk and Avoiding Consequences as a Design Professional in the State of New Jersey, July 2009
Pro Bono Activities
Councilman, Metuchen Borough Council 2008-2011
Board of Directors, Kamp Kiddie Keep Well, Edison, New Jersey, 2010-Present
