G. Zachary Terwilliger

Elizabeth C. Morrogh is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Elizabeth C., who practices law in Fairfax, Virginia, has been recognized since 2015. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Elizabeth C. is held by other top lawyers in the same geographic and legal practice area.

Jessica is the Managing Partner of Rock Creek Energy Group. Jessica’s practice is focused on renewable and conventional independent power producers, power marketers, and transmission developers throughout the United States. She represents owners, operators and investors of all sizes in the electric energy sector, from startup developers to private equity funds, infrastructure funds and institutional investors. ‍ Jessica specializes in federal energy regulatory matters related to: De...

Alexandra Field is a top attorney recognized by Best Lawyers in the practice area(s) of Communications Law. Alexandra, 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 Alexandra is held by other top lawyers in the same geographic and legal practice area.

John S. Decker P.C. is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. John S., who practices law in Washington, District of Columbia, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John S. is held by other top lawyers in the same geographic and legal practice area.

Matthew Kapuscinski is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: General Practice. Matthew, who practices law in Reston, Virginia, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Matthew is held by other top lawyers in the same geographic and legal practice area.

Robert Luskin is a partner in the Investigations and White Collar Defense practice at Paul Hastings and is based in the firm’s Washington, D.C. office. He is one of the best known and most highly-regarded litigators in Washington, D.C., concentrating in complex criminal litigation at both the trial court and appellate level. Beginning his career in government service, and having later transitioned into private practice, Mr. Luskin has represented clients in virtually every high-profile ...

David Rust Clarke is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law and Family Law Mediation. David Rust, who practices law in Fairfax, Virginia, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David Rust is held by other top lawyers in the same geographic and legal practice area.

Bob Wellen, a partner of the firm, has practiced tax law for nearly 35 years. His practice involves planning, structuring and negotiating business transactions and representing taxpayers seeking private letter rulings from IRS and tax policy determinations from IRS and the Treasury Department and in controversies with IRS. He also serves as an arbitrator and as an expert witness in commercial disputes involving tax issues. Bob grew up in Jersey City, New Jersey. He graduated from Yale College...

R. Peyton Mahaffey is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Trusts and Estates and Personal Injury Litigation - Plaintiffs. R. Peyton, who practices law in Fairfax, Virginia, has been recognized since 2011. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which R. Peyton is held by other top lawyers in the same geographic and legal practice area.

Heidi builds on her previous experience at the Office of Counsel to the Inspector General of the Department of Health and Human Services to assist clients with health care regulatory, compliance, and fraud and abuse matters. Heidi previously served as chief of the Administrative and Civil Remedies Branch in the Office of Counsel to the Inspector General (OCIG) at the Department Health and Human Services. Heidi served as the OCIG’s coordinator for both the Provider Self-Disclosure Protoc...