Christopher P. Sullivan

Warren is a Partner in the Real Estate Department. Although his practice encompasses the entire range of commercial real estate law, he concentrates in the area of leasing.

Dominic Massa is a nationally recognized intellectual property litigator with nearly 30 years of experience representing many of the world’s leading technology companies in high-stakes patent disputes across a wide range of industries.

Jonathan M. Sachs is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Jonathan M., who practices law in Boston, Massachusetts, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jonathan M. is held by other top lawyers in the same geographic and legal practice area.

Greg is the leader of the firm’s Permitting & Land Use and Energy, Infrastructure & Sustainability practice groups. He is a real estate, land use, and environmental attorney with more than 20 years of experience in commercial real estate transactions, including significant experience in the planning, design, permitting and development of contaminated properties and similarly challenging sites, as well as renewable energy and infrastructure projects. His practice covers all aspec...

Meghan Walsh is a tax partner with extensive experience in transactional matters for both corporations and pass-through entities. Ms. Walsh’s practice includes taxable and tax-free mergers and acquisitions, capital markets transactions, and lending and financing transactions, as well as partnerships, joint ventures and fund formations. Ms. Walsh also advises clients with respect to equity compensation in corporate and pass-through structures. Ms. Walsh also has experience with federal a...

Donald W. Parker is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. Donald W., who practices law in Waltham, Massachusetts, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Donald W. is held by other top lawyers in the same geographic and legal practice area.

John Beals is a partner in Nixon Peabody's Private Equity and Investment Funds practice. He represents public pension funds, funds of funds and other institutional investors in connection with their investments in leveraged buyout, venture capital, real estate and debt private equity funds. He also advises fund sponsors in structuring and forming such funds. What do you focus on? I focus my practice on two main areas, leveraging 20 years of experience to help clients structure, negotiate and ...

Daniel Halston focuses on securities litigation, general commercial litigation and administrative law disputes. He has represented numerous public and private high technology, life sciences, and financial services companies and their officers and directors in a wide range of complex litigation matters, including securities fraud class actions, derivative litigation, mergers and acquisitions disputes, false claims act actions, breach of fiduciary duty claims, investment advisor claims, closely...

Debra K. Lussier is a top attorney recognized by Best Lawyers in the practice area(s) of Private Funds / Hedge Funds Law. Debra K., 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 Debra K. is held by other top lawyers in the same geographic and legal practice area.

Anthony D. Rizzotti represents a wide range of employers, including healthcare systems, hospitals, and life sciences companies in: Collective bargaining negotiations Contract administration Labor arbitrations Union elections Non-compete and trade secret litigation Wage and hour matters Appearing before the National Labor Relations Board and in state and federal courts in Massachusetts, Florida and Rhode Island, he also handles discrimination issues and claims arising under: The National Labor...