Keith D. Black, Chairman of the Board

Since 2007, Keith D. Black has advised clients on a broad range of Trusts and Estates matters, including estate and trust planning, administration and litigation. Mr. Black currently works as Counsel with Lewis Johs Avallone Aviles, LLP in the Trusts and Estates group, with offices in Islandia, New York, and Manhattan. From 2008 through 2019, Mr. Black headed his own law firm and expanded his practice to include guardianships, elder law, planning for persons with special needs, and real estate. Mr. Black’s practice also encompassed representing high net worth individuals, trusts, estates, family businesses and foundations in sophisticated tax planning and administration. As a litigator, Mr. Black’s practice developed to include probate contests, accounting and kinship proceedings, discovery and turnover proceedings, trust invalidation proceedings, and guardianship proceedings. Mr. Black frequently receives appointments by the Surrogate’s Courts as a Guardian ad Litem to represent minors and other persons under a disability in Surrogate’s Court proceedings. He would also receive appointments as a Court Evaluator in Supreme Court matters brought under Article 81 of the New York Mental Hygiene Law. Mr. Black is a frequent speaker on estate and trust planning, administration and litigation. Aside from his passion for the practice of law, Mr. Black is an active mentor, and creator of the Student Ambassador Program through the Nassau Lawyers’ Association of Long Island, Inc., to which Mr. Black is the Chairman of the Board and former president (2016-2017). Mr. Black has also serves on the Continuing Legal Education Committee of the Nassau Lawyers’ Association of Long Island, Inc., and Scholarship committee, which provides annual scholarships to law school students.


  • New York State Bar Association
  • Suffolk County Bar Association
  • Nassau County Bar Association
  • Nassau Lawyers’ Association of Long Island- Chairman of the Board (2020-2021); Former President (2016-2017)


State of New York – Second Judicial Department