Roseland-based law firm Mandelbaum Barrett PC will add all 24 attorneys and staff from Ivey, Barnum & O’Mara, LLC (IBO), a long-standing Greenwich, Connecticut firm, starting January 1, 2026. This move expands Mandelbaum Barrett PC’s presence into New England and offers more resources to clients in Connecticut. The combination is expected to enhance both firms’ work in areas such as real estate, trusts and estates, franchise law, litigation, and personal injury.
William S. Barrett, CEO of Mandelbaum Barrett PC, stated: “This strategic expansion of Mandelbaum Barrett PC into Connecticut and the subsequent growth of our practice now allow us to serve both corporate and individual clients in the region with even greater depth, agility, and personalized service. But, just as important, the attorneys and staff of Ivey, Barnum & O’Mara who have joined Mandelbaum Barrett bring a shared legacy of excellence, community leadership, and client-first values to our firm.”
Founded in 1950, IBO is recognized as the largest law firm based in Greenwich. The firm is known for its expertise across several legal fields including real estate transactions and litigation. Many attorneys joining Mandelbaum Barrett PC have held leadership roles within their communities or legal organizations.
Stephen G. Walko, partner and management committee member at IBO said: “Our firm was built in Greenwich, and our roots here in Fairfield County run deep. This partnership represents an opportunity not only to expand our capabilities and resources for our growing client base here, but also to preserve everything that has defined our practice locally. We are proud to take this next step with a firm that appreciates the importance of community grounded in places like Greenwich.”
Barry R. Mandelbaum, chairman of Mandelbaum Barrett PC added: “The addition of these attorneys to Mandelbaum Barrett marks a significant milestone in our firm’s strategic and steady growth from a small practice founded in 1930 with just one attorney to now 150 attorneys beginning in 2026. It is certainly an exciting way to start our 96th year and testimony to both the firm’s impact and the culture we have built over the years.” He noted that his father founded the original Newark-based office.
Steven Steinmetz from IBO’s management committee said: “Our attorneys are excited to join Mandelbaum Barrett PC and bring even more value to our clients. This move allows us to expand our capabilities under the Mandelbaum Barrett name, while staying true to the relationships and values that have defined our firm for 75 years. Clients of IBO will continue to work with their trusted attorneys, who are now part of a broader team of professionals offering a more extensive range of services. This will ensure seamless, continued access to high-quality, personalized legal counsel as part of Mandelbaum Barrett’s enhanced resources and reach.”
