Jessica Wisniewski focuses her practice on litigation matters, where she represents clients in a broad range of corporate and commercial disputes.

While earning her law degree, Jessica served as a judicial extern at the New York State Supreme Court, legal extern at the Environmental Law Division of the New York City Law Department and legal intern at the Eastern Environmental Law Center. She was notes and articles editor of the Fordham Environmental Law Review and a recipient of the Archibald R. Murray Public Service Award.

• Best Lawyers: Ones to Watch in America, Employee Benefits (ERISA) Law, 2026

• American Bar Association ESOP Subcommittee, vice chair
• National Center for Employee Ownership, service provider member
• The ESOP Association, member
• Rogers Behavioral Health Foundation, board of directors and executive governance committee member
• Ladder Up Tax Assistance Program, volunteer

Mark A. Nelson focuses his practice on employment matters.

Prior to joining the Firm, Mark served as a law clerk for the Honorable Samuel H. Mays Jr. of the US District Court for the Western District of Tennessee and for the Honorable Charles R. Wilson of the US Court of Appeals for the Eleventh Circuit.

During law school, Mark was the executive online editor of the Notre Dame Law Review and served on the journal’s executive board.

Christian Tatum focuses his practice on intellectual property matters, including patent litigation and post-grant proceedings. He has worked with clients in a variety of technology sectors, including energy generation, aerospace, and semiconductor.

Prior to rejoining the firm, Christian served as a law clerk to Chief Judge Rodney Gilstrap in the US District Court for the Eastern District of Texas, during which time he participated in eight civil jury trials and a bench trial, as well as numerous pre-trial conferences and Markman hearings. In law school, Christian was a James Kent Scholar, Harlan Fiske Stone Scholar, Hamilton Fellow, and articles editor for the Columbia Science and Technology Law Review. He has a strong technical background, having earned bachelor’s degrees in physics and astronomy.

• Make-A-Wish Mid-Atlantic, wish granter

David Ratnoff focuses his practice on litigation matters, where he represents clients in a broad range of corporate and commercial disputes.

While earning his law degree, David served as a legal intern at the US Department of Housing and Urban Development’s Office of Fair Housing and Equal Opportunity and as a legal intern at the Lawyers’ Committee for Civil Rights Under Law. He was also articles editor of the Columbia Human Rights Law Review and a Harlan Fiske Stone scholar.

Erica Zhao advises and represents employers in all aspects of employment law. She handles pre-litigation disputes, wage and hour actions, discrimination and harassment claims, Private Attorneys General Act and California Fair Employment and Housing Act matters, and National Labor Relations Board unfair labor practice investigations. She also has experience drafting pleadings, motions, and case management statements; handling discovery; and interviewing witnesses in state and federal courts and arbitration.

During law school, Erica served as a judicial extern for the Honorable Mark D. Houle of the US Bankruptcy Court for the Central District of California.