Benjamin Osorio

Michael Sharkey is a partner with the firm’s Insurance Recovery practice and concentrates his practice on representing policyholders in insurance coverage disputes nationwide. He has represented clients on a wide variety of insurance issues, including litigation seeking insurance coverage for alleged products liability, environmental contamination, water damage and mold, director’s and officer’s liability, errors and omissions, asbestos bodily injury and property damage, unf...

David is the managing partner of the Washington, D.C. office, as well as the co-leader of the Investment Management Group. Prior to joining Sullivan & Worcester, David was Special Counsel in the Washington, D.C. office of Gibson, Dunn & Crutcher. He previously served as Assistant General Counsel for Legislation and Investment Company and Adviser Regulation at the Securities and Exchange Commission and as Counsel to SEC Commissioner Aulana Peters.

Christopher Allen is a top attorney recognized by Best Lawyers in the practice area(s) of Consumer Protection Law. Christopher, who practices law in Washington, District of Columbia, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christopher is held by other top lawyers in the same geographic and legal practice area.

William (Tom) Thompson has specialized in government contract law and construction litigation for more than 40 years. Tom has represented a broad range of Government contractors (major defense contractors, information technology and systems integration contractors, construction contractors, etc.). His clients have ranged from multibillion-dollar contractors to start-up companies. This representation has included advice on federal cost principles and cost accounting requirements, and complianc...

Leon Fresco is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. Leon, who practices law in Washington, District of Columbia, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Leon is held by other top lawyers in the same geographic and legal practice area.

Neil Eggleston is a litigation partner in the Washington, D.C., office of Kirkland & Ellis LLP. Neil has a distinguished record of public service, and has held a number of senior government roles. He was White House Counsel to President Obama from 2014 to 2017, and advised the president on all legal and constitutional issues across a broad spectrum of domestic and foreign policy matters. Neil’s practice focuses on enforcement defense including at the U.S. Department of Justice (DOJ)...

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

Margaret A. O'Reilly is a top attorney recognized by Best Lawyers in the practice area(s) of Elder Law. Margaret A., who practices law in Fairfax, Virginia, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Margaret A. is held by other top lawyers in the same geographic and legal practice area.

Nicole M. Elliott is a top attorney recognized by Best Lawyers in the practice area(s) of Native American Law and Tax Law. Nicole M., who practices law in Washington, District of Columbia, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Nicole M. is held by other top lawyers in the same geographic and legal practice area.

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