Hee Jae Park

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.

Bill Christiansen specializes in biotechnology patent matters, with particular emphasis on U.S. and international patent procurement, strategic management of patent portfolios, investment due diligence, early stage company counseling and competitive patent position analysis. He received his B.S. in Biochemistry and Biophysics (with honors) from Oregon State University (1991). After obtaining a Ph.D. in Biochemistry/ Biophysics/Molecular Biology from the University of Notre Dame (1995), for wh...

Ian represents companies, executives, and fiduciaries in connection with Employee Retirement Income Security Act (ERISA) litigation, employee benefits and executive compensation matters, class actions, and other commercial disputes. Trained as a trial lawyer, Ian has focused almost exclusively on employee benefits related litigation for the past 15 years. What do you focus on? I focus my practice on ERISA litigation. With broad experience in this area, I help defend plans, fiduciaries, and co...

Carl C. Risch is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. Carl C., who practices law in Washington, District of Columbia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Carl C. is held by other top lawyers in the same geographic and legal practice area.

Benjamin Powell is widely recognized as one of the country's top authorities on handling cybersecurity, data breach and related investigation matters. He has advised companies on major cybersecurity incidents and incident preparedness across virtually every sector of the economy, including the banking, investment management, software, retail, energy, defense and intelligence, media and entertainment, pharmaceutical, cloud services, government contracting, aerospace, information technology, ma...

Carolyn Grimes is a partner in the firm, practicing in all areas of family law including divorce, spousal support, child custody, child support, equitable distribution, retirement issues, and prenuptial agreements, among other areas. She practices in all of the Circuit and Juvenile and Domestic Relations Courts in Northern Virginia and has argued before the Court of Appeals. She has lectured on family law topics ranging from custody to retirement issues, including military, federal, civilian ...

Adam J. August is a partner in Holland & Knight's Corporate/Mergers & Acquisitions Practice Group. Mr. August counsels public and private company clients in a variety of industries including information technology, government contracting, software and telecommunications. He has been actively involved in merger, acquisition and disposition transactions with a combined value more than $1 billion, and financing/investment transactions and securities offerings worth more than $600 million...

Peter Everett is a trial lawyer who devotes his practice to representing persons injured by the reckless or careless acts of others. His practice includes four broad areas. First, Mr. Everett represents victims of violent crimes in child care center, employee assault and inadequate security cases against child care centers, private schools, shopping malls, hotels, apartment buildings and other commercial properties. He has testified before Congress on legislation designed to regulate the secu...

Jiayan Chen is deeply experienced in the regulatory, transactional and strategic issues that arise when leveraging health information, biospecimens and technology to drive healthcare innovation and quality. She guides stakeholders on privacy compliance and research compliance and in the context of strategic initiatives and collaborations as they seek to harness the power of data, machine learning, DNA sequencing and technologies to develop and deploy new products and solutions and address cha...

Began the practice of law at the Federal Power Commission in 1974. Joined Sidley & Austin (now Sidley Austin LLP) in 1977, elected to partnership in 1981. Co-head of Energy practice, 2006- present