Stephen Graeff

Practicing in the area of energy law, Elizabeth Whittle counsels clients with respect to natural gas, hydroelectric and electric regulatory and transactional matters. What do you focus on? Federal Regulatory I am an active practitioner before the Federal Energy Regulatory Commission, representing clients in hearings, settlement conferences and adversary proceedings in the natural gas, electric and hydroelectric areas. I am active in proceedings involving regional transmission organizations an...

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.

Paul Oosterhuis is a senior international tax partner representing clients on a wide range of international and U.S. tax matters. Mr. Oosterhuis has extensive experience in international mergers and acquisitions, post-acquisition integration transactions, spin-offs, internal restructurings and joint venture transactions. He also represents multinational companies in nontransactional international tax planning and IRS controversy matters. In recent transactions, Mr. Oosterhuis has represented:...

Justin A. DeVault uses comprehensive estate and tax planning to help clients plan for the future. By working closely with clients throughout the various stages of their lives, he helps them preserve wealth for future generations by protecting the assets they have worked hard to accumulate, while minimizing federal and state estate tax liability. Justin works with individuals and families to carefully craft estate plans tailored to each client’s specific needs. He utilizes planning devic...

David Bilodeau has a bachelor’s and master’s degree in electrical engineering from the California State University at Long Beach, and a second master’s degree in telecommunications from Johns Hopkins University. He also has a Juris Doctor degree in Law from George Mason University. Mr. Bilodeau has extensive industry experience while employed as an electrical engineer with the Hughes Aircraft Radar and Space and Communication Groups. He has practiced in the intellectual prop...

Colleen M. Haddow has been practicing exclusively in the area of family law since 2006. Ms. Haddow focuses her practice on all aspects of family law, including divorce, custody, spousal support, mediation and property settlement agreements. Ms. Haddow regularly appears throughout courts in Northern Virginia representing the interests of her clients. She takes a practical and economical approach to her cases and strives to meet the individual needs of each client. Ms. Haddow thoroughly enjoys ...

Dara Newman Histed is a lawyer recognized by Best Lawyers in the practice area of Real Estate Law. Dara Newman practices law in Washington, District of Columbia Best Lawyers has recognized Dara Newman Histed since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Dara Newman Histed is held by other lawyers.

Sean Howley brings first-hand construction industry experience to his legal practice, having managed and worked on multi-million dollar public works projects in New York City and the surrounding area. After earning a Bachelor of Science in Civil Engineering from the University of Notre Dame, he worked as a Project Engineer and Project Manager for a heavy construction contractor. He later earned his Juris Doctor from St. John’s University School of Law and has since devoted his practice ...

Jeffrey R. Holmstead is a lawyer recognized by Best Lawyers in the practice areas of Environmental Law and Litigation - Environmental. Jeffrey R. practices law in Washington, District of Columbia Best Lawyers has recognized Jeffrey R. Holmstead since 2008. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Jeffrey R. Holmstead is held by other lawyers.

William Walsh is a lawyer recognized by Best Lawyers in the practice areas of Business Organizations (including LLCs and Partnerships), Closely Held Companies and Family Businesses Law and Corporate Law. William practices law in Fairfax, Virginia Best Lawyers has recognized William Walsh since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which William Wa...