Estate Planning & Administration and Fiduciary Litigation Law Firm



Professional, yet sensitive; traditional, yet innovative; knowledgeable, yet inquisitive.  These are the qualities on which Engel Devlin Sgambati, LLC prides itself.  Our practice specializes in estate planning and administration as well as fiduciary litigation and was established in 1946 by Joseph G. Engel.   We have supported our clients (and their children and grandchildren) ever since, helping to protect what matters to them for the future, while also navigating the present.  Our clients are at the core of all that we do.

We understand that no two people are the same, nor are their estate planning needs.  We work hard to understand the nature and extent of your assets and your long term objectives to ensure that the plans we put in place suit your needs – whether they are to efficiently safeguard assets for the future in trust, transfer generational wealth, establish a charitable foundation or draft a simple will that satisfies your intentions.  Our estate administration services are also tailored to your circumstances; we will provide legal services to the extent that you need them. 

We counsel fiduciaries (executors, trustees, guardians) in carrying out their duties. 

We advise beneficiaries of their rights and remedies. 

We litigate all types of estate and trust disputes, from accounting actions, to trust modifications to guardianship actions, among other matters.

Your concerns are important to us and that is why some clients consider us an extension of their families.  We are professional and our office is relaxed (we have an office dog, Winston).  We understand why you want to leave a legacy and will create interesting ways to achieve it.  We have a vast breadth of knowledge and experience, and we always look forward to meeting new clients and hearing about their lives and ambitions.

A relationship with Engel Devlin Sgambati, LLC creates a secure foundation for your family’s legal needs for years to come. 


“You really need confidence in the professionals you retain. 

I never have to worry that my matters will be handled properly and professionally and completed in a timely manner at Engel Devlin Sgambati.”–Ellen M.



After decades of concentrating in the areas of estate planning and administration, Bill presently focuses most of his practice time on private foundations, charitable trusts and governance matters for non-profit organizations. 


Bill is currently the Board Chair of The Hyde and Watson Foundation and the Council of New Jersey Grantmakers.  He has served, cumulatively, for decades on numerous non-profit Boards of Trustees, including 23 years as a Trustee of The Pingry School, the last 7 of which were as Board Chair.  He was one of the founding Trustees of New Jersey SEEDS and served on that Board for many years. 


Bill presently serves as a Trustee and Executive Director of the E.J. Grassmann Trust and as President of the Union Foundation and the Standish Foundation.  He also advises the Board of the Laurents/Hatcher Foundation in connection with tax compliance and fiduciary responsibility.  He regularly serves as a speaker or panelist at non-profit conferences and seminars.


The Pingry School, cum laude 1967

Princeton University, A.B. History with Honors & Certificate of Proficiency in African-American Studies 1971

University of Virginia School of Law, J.D. 1974


Missy concentrates her practice in all areas of estate planning, estate administration and fiduciary litigation.  She counsels clients on generational wealth transfer and family business succession plans.  She represents clients in estate and inheritance tax audits conducted by the IRS and the New Jersey Division of Taxation. 


Missy litigates a variety of estate, trust, tax, guardianship and chancery matters.  She drafts and negotiates antenuptial and marital agreements and provides ongoing corporate governance and risk management advice to charitable organizations.  She has been appointed by the Superior Court of New Jersey on numerous occasions to serve as a Guardian ad Litem, Special Medical Guardian and Court Appointed Attorney for a variety of wards. 


Missy has served as a speaker and panelist at numerous continuing legal education seminars in the areas of estate planning, fiduciary litigation and private foundations.



Tufts University, B.A. English & Theology 1996

New York Law School, J.D. 2002

New York Law School, LL.M. Taxation 2008


Sean concentrates his practice on estate administration, estate planning and private foundation law and counsels clients on generational wealth transfer and family business succession plans.  He advises boards of private foundations on best practices for corporate governance and tax exemption compliance and has served extensively on such boards and as a trustee of various charitable and family trusts. 


Sean has served as a Trustee of the Union Foundation since 2002, the N.R. Leavitt Foundation since 2011 and the E.J. Grassmann Trust since 2013.


Sean formerly served as the Board President of the George Street Playhouse from 2005-2007, a Member of its Board of Trustees from 2003-2007, and presently serves as a Member of the Board of Trustees of The Raptor Trust.



Rutgers University, B.A.

Accounting with Honors 1991


Seton Hall Law School, J.D. 1998

Tel: 908-753-2440

Tel: 908-753-2440

Tel: 908-753-2440






31 Mountain Boulevard, Unit E​, Warren NJ 07059
Tel:  908-753-2440

Fax: 908-753-9384


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