Mark Foss

John’s entire legal career has been devoted to U.S. immigration and nationality law. His practice covers all facets of employment- based immigration, as well as family immigration and naturalization. He has in-depth experience providing strategic advice and counsel to both small entrepreneurial businesses and to multinational corporations. An AV-rated immigration attorney for more than a decade, John is also nationally recognized for his expertise in representing distinguished professor...

Terri L.B. Partridge, who heads the firm's family law group, has held the highest Martindale-Hubbell rating, AV, since 1996. She has been, again, listed as one of the top Family Law Attorneys in Massachusetts Super Lawyers 2010, as seen in Boston Magazine November 2010 and at superlawyers.com. Throughout her 21-year career, she has handled numerous divorce cases involving complicated issues such as the validity of postnuptial and antenuptial agreements and trusts; and the valuation of closely...

Sean is a corporate partner in Kirkland’s Investment Funds Group who focuses on representation of investment managers in all aspects of their business and operations, with a particular emphasis on formation of private investment funds, and in structuring and execution of secondary transactions. He is described by clients in Chambers USA as “clearly a gem” who is “hands-on, precise and articulate” and “very practical and business-minded.” Chambers Glob...

Of his 20 years practicing law, Ben Zimmermann has spent 20 at Sugarman & Sugarman P.C. in Boston. After finishing his studies at Fordham University School of Law, he got his start in the corporate litigation group of a large New York City firm. His path quickly changed and took him to SUGARMAN, where he has emerged as a leading trial lawyer in New England, and the managing partner of a firm with a sixty year history of excellence in litigating and trying serious personal injury cases. Ra...

William M. Shields is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Leveraged Buyouts and Private Equity Law and Mergers and Acquisitions Law. William M., who practices law in Boston, Massachusetts, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William M. is held by other top lawyers in the same geographic and legal practice area.

Joel is particularly experienced in the tax structuring of complex business and investment arrangements using partnerships, limited liability companies and Subchapter S corporations. He advises a broad range of private and institutional investors, including real estate investment firms, on a wide variety of U.S. federal income tax matters, including in connection with fund formation matters, the acquisition and disposition of property, structuring debt and equity investments, equity compensat...

Keith Barnett is an experienced lawyer who has developed a successful practice representing clients in all aspects of commercial real estate, including real estate finance, development, acquisitions, sales and leasing. During the course of his career, Mr. Barnett has represented local, national and international clients, including some of the world’s largest publicly traded retailers, investors, developers, pension fund advisors and life insurance companies, among others, in various rea...

Robert H. Morsilli is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Labor and Employment. Robert H., who practices law in Boston, Massachusetts, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert H. is held by other top lawyers in the same geographic and legal practice area.

Laura P. Knoll is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. Laura P., who practices law in Boston, Massachusetts, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Laura P. is held by other top lawyers in the same geographic and legal practice area.

Lou, Co-Chair of the firm's Lateral Partner Hiring Committee and former member of Sullivan's Management Committee, represents clients, both public and private, in commercial acquisitions, dispositions and financings across various real estate asset classes, including office, retail, senior living, hospitality and marinas, many of which are multi-state, portfolio transactions. His practice includes a particular focus on representation of real estate investment trusts (REITs). The transactions ...