• PDF
  • Bookmark and Share


  • J.D., Rutgers University School of Law - Newark, 2001
  • B.A., Pennsylvania State University, 1997

    Articles Editor, Rutgers Law Review, 2000-2001

    Editor, Rutgers Law Review, 1999-2000

Bar Admissions

  • Massachusetts
  • New Jersey

Memberships & Affiliations

American Bar Association

New Jersey State Bar Association

Alison C. O'Sullivan

  • |
  • T: 617.449.6578
    F: 617.607.9188

Ms. O'Sullivan concentrates her practice in the areas of family law and trusts and estates litigation.

Ms. O'Sullivan’s family law experience includes the litigation of complex divorce cases from inception through mediation, trial, and post-judgment enforcement and modification motions; litigation of support and custody matters between unmarried individuals; negotiation of cohabitation, prenuptial and postnuptial agreements; and many other aspects of Family Law.

Ms. O'Sullivan’s trusts and estates representation includes all facets of fiduciary and non-fiduciary litigation, including representing individual and corporate entities in will contests (frequently involving claims of diminished capacity and undue influence); will and trust construction proceedings; contested accounting proceedings; applications for instructions by fiduciaries; breach of fiduciary duty claims; and trust reformation proceedings.

Ms. O'Sullivan also has experience in several areas where family law concepts and trusts and estates concepts overlap, such as guardianship and adoption proceedings as well as palimony claims.

Representative Matters

Representation of corporate fiduciaries in trust, and estate and fiduciary accounting proceedings.
Representation of trust and estate beneficiaries in litigation of disputes relating to trust and estate matters including will contests and accounting proceedings.
Litigation of family law matters primarily involving high net worth individuals with respect to divorce, support, custody, and palimony actions.
Negotiation and preparation of cohabitation, prenuptial and matrimonial settlement agreements.


The Impact of Equality for Same-Sex Couples
New Jersey Law Journal
No Separate Residences; Cohabitation is required for a viable palimony claim
New Jersey Law Journal
Courts Can Order Sale of Property Prior to Divorce
New Jersey Law Journal