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Dennis Wiley practices trusts and estates law, splitting his practice between the area of fiduciary litigation, estate planning and administration, and taxation.  He has extensive experience in probate contests, turnover proceedings, and contested accountings, as well as tax controversy matters.  In addition, Mr. Wiley assists families and individuals with wealth transfer planning and business succession planning, with an eye toward avoiding future disputes, and regularly advise clients on multi-jurisdictional issues.  In addition to his work at McLaughlin & Stern, Mr. Wiley is a frequent contributor to the Nassau County and New York State Bar Associations on issues pertaining to the practice of trusts and estates law.

Mr. Wiley lives on Long Island with his wife, Shannon, and his two young children.


On May 19, 2021, Dennis Wiley presented a continuing legal education program titled, "The Who, What, When, Where and How of Vacating a Probate Decree,"…

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  • University at Buffalo (B.S., magna cum laude, 1998) 
  • University at Buffalo Law School (J.D., cum laude, 2006, Law Review) 

Bar Admissions

  • New York, 2007
  • U.S. Tax Court, 2015


  • Nassau County Bar Association (Member and Former Co-chair, Surrogate’s Court, Estates and Trusts Committee; Member, Business Law, Tax and Accounting; Member, Elder Law, Social Services & Advocacy) 
  • New York State Bar Association (Member, Trusts & Estates Law Section; Co-chair, Committee on Practice and Ethics) 


Olean, N.Y.