About Heather O’Neill


• New York State Bar
• Barrister, England and Wales

• New York State Bar Association
• New York Women’s Bar Association
• Trusts and Estates Law Section; Elder Law and Special Needs Law Section
• Society of Trusts and Estates Practitioners (STEP)
• The Honourable Society of the Inner Temple

Heather O’Neill

Heather O’Neill focuses her practice on the areas of Trusts & Estates, Elder Law, Estate Planning and Guardianship. She has assisted clients, both fiduciaries and beneficiaries, in matters both complex and simple regarding the administration of trusts and estates. She has also assisted clients with elder law issues, including advising on Medicaid benefits, estate planning and the preparation of advance care directives, wills and trust agreements, including asset protection trusts.

Heather has represented fiduciaries and beneficiaries in Surrogate’s Court in a variety of matters, in litigated probate and administration proceedings and contested accounting proceedings. She has been appointed numerous times by the Surrogate’s Court as Guardian ad Litem in probate, kinship and accounting matters. Heather has represented clients in Supreme Court guardianship proceedings, both for persons alleged to be incapacitated and those seeking guardianship of others. She has been appointed numerous times by Supreme Court Justices as the Court Evaluator and the Attorney for the Alleged Incapacitated Person in guardianship proceedings. Heather is a court appointed Guardian for personal needs and property management of a New York County resident.

Heather has concentrated on these areas of practice with the Manhattan law firms of Morrissey & Morrissey, LLP, focusing on estate planning, Trusts & Estates and Guardianship, and with Lamson & Cutner, PC, focusing on elder law, advising on Medicaid benefits, estate planning and asset protection trusts, as well as continuing her practice with Trusts & Estates and Guardianship. Further, she has lectured on both estate planning and guardianship proceedings. Heather was born in Northern Ireland and studied law in London at the University of North London and at the Inns of Court School of Law. She was called to the Bar of England and Wales in 1992, completed her pupillage with the Chambers of Rock Tansey, QC, Gray’s Inn Square, London, and continued working there focusing on criminal defense litigation before moving to New York. She was admitted to the New York Bar in 1997.

Heather can be reached at honeill@olenkolaw.com and at (212) 473-0800.

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