Sullivan
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Biography

Steve is director of Sullivan's Private Clients/Trusts & Estates Practice Group. He focuses his practice on estate planning, helping high net worth individuals preserve and build wealth for the benefit of future generations. In particular, Steve counsels clients on minimizing income, estate, gift and generation skipping taxes, as well as succession planning for family-owned businesses. In addition to implementing wealth transfer strategies under wills and revocable trusts, Steve utilizes intentionally defective grantor trusts (IDGTs), irrevocable life insurance trusts (ILITs), spousal lifetime access trusts (SLATs), grantor retained annuity trusts (GRATs), family limited liability companies (FLLCs), family limited partnerships (FLPs), and qualified personal residence trusts (QPRTs).

In addition to estate planning, Steve also counsels personal representatives and trustees on the administration of estates and trusts. In this role, he has experience handling a wide range of probate court matters and working toward the settlement of estate or trust administration.  

Steve also has experience preparing and reviewing estate tax returns, gift tax returns, and fiduciary income tax returns. 

Before joining Sullivan, Steve was in the Trusts & Estates group of another mid-size law firm and served as a law clerk to the Honorable Victoria A. Graffeo of the New York Court of Appeals.

Education
  • Syracuse University College of Law (J.D., summa cum laude)
  • Boston University (B.A./M.A. (dual degree), magna cum laude)
Bar & Court Admissions
  • New York
  • Massachusetts
Professional Qualifications
  • Boston Bar Association
Awards & Honors
  • "Ones to Watch," Best Lawyers in America®, Trusts and Estates (2024, 2025)
  • "Rising Star," Massachusetts Super Lawyers (2020-2026)
  • Boston Magazine Top Lawyers, Trusts and Estates (2025)
Sullivan Attorneys Selected to 2026 Massachusetts Super Lawyers and Rising Stars Lists
Super Lawyers has selected 15 attorneys from Sullivan's Boston office to its 2026 Massachusetts Super Lawyers and Rising Stars lists. Attorneys are recognized for excellence in the practice of law, rated by a high degree of peer recognition and professional achievement. The recipients of this designation will be featured in Massachusetts Super Lawyers magazine and in The Boston Globe in October. The following Sullivan attorneys have been named to the 2026 Massachusetts Super Lawyers list: Patrick Dinardo - Business Litigation Richard Jones - Tax David Nagle - Tax Ameek Ashok Ponda - Tax Douglas Stransky - Tax Amy Zuccarello - Bankruptcy: Business The following Sullivan attorneys have been named to 2026 Massachusetts Rising Stars list: Matthew Bailey - Real Estate Emily Brewer - Real Estate Steven Cunningham - Estate Planning & Probate William Hanson - Business/Corporate Eric Rietveld - Tax Ryan Rosenblatt - Civil Litigation: Defense Brandon Schneider - Real Estate Ashley Tan - Real Estate Ryan Tompkins - Estate Planning & Probate
Sullivan & Worcester Attorneys Named to 2025 Top Lawyers List by Boston Magazine
Boston, MA – Sullivan is proud to announce that 20 of its attorneys were selected for inclusion in Boston magazine's 2025 Top Lawyers list. To compile the list, area lawyers were invited to nominate up to three of their peers in a select number of specialties. Those who received the most votes in each specialty were then reviewed by an advisory board of select lawyers, chosen for their credentials and the high number of votes they received. The Sullivan attorneys, recognized by specialty, are: Attorneys for Non-Profits Judith Edington Bankruptcy and Workout Patrick Dinardo Amy Zuccarello Civil Law Litigation Ryan Rosenblatt Commercial Real Estate Ashley Brooks Louis Monti John Steiner Spencer Stone Corporate Law Benjamin Armour Lewis Segall Intellectual Property Rights Kimberly Herman Labor and Employment Erika Todd Land Use/Environmental Gregory Sampson Securities Law Howard Berkenblit Tax Law Joel Carpenter Richard Jones David Nagle Ameek Ashok Ponda Trusts and Estates Maura Carney Steven Cunningham About Sullivan Sullivan & Worcester (Sullivan) is a global, mid-sized law firm with lawyers in Boston, London, New York, Tel Aviv and Washington, D.C. Sullivan’s clients, including Fortune 500 companies, leading financial services firms and asset managers, boards of directors, real estate companies, and emerging businesses, rely on Sullivan’s ability to navigate complex legal and operational landscapes, the impeccable judgment of its lawyers, and its commitment to best‑in‑class client service.

Steven M. Cunningham, Jr.

Horizon Beverage Group, Inc. Acquired by the World’s Preeminent Distributor of Beverage Alcohol

Sullivan represented Horizon Beverage Group Inc., one of New England’s premier alcohol distributors, in its sale to Southern Glazer’s Wine & Spirits, the world’s preeminent distributor of beverage alcohol. The acquisition marks an exciting expansion for Southern Glazer’s, adding Massachusetts and Rhode Island as the 46th and 47th markets in its U.S. footprint, alongside operations in Canada and the Caribbean.

“We are grateful to Horizon’s employees, customers, and partners for so many years of success, and this transition represents an even brighter future for all,” said Bob Epstein, CEO/President at Horizon. “We’re confident that Southern Glazer’s strength and scale will not only support a smooth integration, but also create new opportunities for growth and success.”

“We’re committed to maintaining the exceptional service that Horizon is known for while bringing the added benefits of being part of the Southern Glazer’s family,” added Jim Rubenstein, CEO/Treasurer at Horizon. “This partnership ensures stability and growth for all stakeholders and strengthens our ability to deliver value across the board.”

Lewis N. Segall, Charles E. Chambers Jr., Ida J. Vanto, Sharon G. Leifer, Steven M. Cunningham, Jr. and Christopher C. Curtis

Masy BioServices Acquired by a Leading Pharmaceutical and Biotech Contract Development and Manufacturing Organization

Sullivan represented Masy Systems Inc. ("Masy" or "Masy BioServices"), a preferred provider of cGMP Biostorage and pharma support services, in the sale of its Masy to Alcami Corporation, a leading pharmaceutical and biotech contract development and manufacturing organization (CDMO). 

Lewis N. Segall and Steven M. Cunningham, Jr.

Scientist holding DNA gel in front of samples for testing in laboratory