Daniel B. Klein

Dan Bailey has more than 25 years of experience in environmental, land use, real estate, and municipal law. He prides himself on offering pragmatic solutions to complicated legal matters. While Dan’s “sweet spot” is the redevelopment of commercial property, he has a strong background in all aspects of environmental and regulatory law. Dan also handles all types of real estate transactions. Dan has helped facilitate development of a wide range of commercial real estate projec...

Michael J. Attisha Ph.D. is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Michael J., who practices law in Boston, Massachusetts, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael J. is held by other top lawyers in the same geographic and legal practice area.

Stephanie Berdik is a partner in the Investment Funds Practice Group in the Boston office of Kirkland & Ellis LLP. Stephanie’s practice focuses on advising U.S. and non-U.S. private investment fund sponsors on all aspects of their business, including establishment of private investment funds, portfolio investment activities, capital raising, fund regulatory and compliance matters, and firm ownership and operational issues. She has worked with a variety of private fund sponsors and, ...

Steven G. Saunders is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Steven G., who practices law in Boston, Massachusetts, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Steven G. is held by other top lawyers in the same geographic and legal practice area.

Thomas has over 20 years of experience representing industry leaders in life sciences. He is internationally recognized for his experience in creating, implementing and monetizing effective patent strategies. He represents public and private companies, investors and academic institutions in the life sciences arena. His portfolio of life sciences companies spans diagnostics, medical devices, life science tools and technology platforms, genomics and therapeutics. Before joining Sullivan, Tom wa...

Liam T. O'Connell is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Liam T., who practices law in Boston, Massachusetts, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Liam T. is held by other top lawyers in the same geographic and legal practice area.

Marc D. Lazar is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Marc D., who practices law in Boston, Massachusetts, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marc D. is held by other top lawyers in the same geographic and legal practice area.

Christopher B. Kaczmarek is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Christopher B., who practices law in Boston, Massachusetts, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christopher B. is held by other top lawyers in the same geographic and legal practice area.

Louis W. Tompros is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice, Litigation - Intellectual Property and Litigation - Patent. Louis W., who practices law in Boston, Massachusetts, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Louis W. is held by other top lawyers in the same geographic and legal practice area.

A trusted advisor to businesses and individuals, Bill is known for obtaining a deep understanding of how his client’s businesses operate, enabling him to develop creative business and legal solutions to resolve disputes, wade through complex issues and achieve the desired results for his clients. His many years of working on complex restructurings in a wide variety of industries has made him an invaluable asset to his clients in both business and litigation matters. Bill has a wide vari...