David A. O'Neil

For more than 30 years, I have established strong relationships with my clients and have enjoyed working closely with them to better understand their goals. It is my top priority to be attentive and responsive to my clients’ needs. While I focus on real estate or leasing transactions, I also understand that our clients are real people. My clients include residential and commercial developers and builders throughout the Washington, D.C. and Baltimore region. I regularly assist them with ...

Whether helping her clients negotiate to draft commercial leases or working collaboratively to resolve complex family law issues, Leslye Fenton brings a uniquely powerful combination of sensitivity and tenacity to her work. As an attorney and trained mediator, Leslye believes in listening carefully to her clients to identify what drives their interests. This key, she says, unlocks the paths toward resolution, successful negotiation and, hopefully, beneficial outcomes. Her practice includes Fa...

Rob Niccolini is co-chair of the firm's Healthcare Practice Group. He represents management in employment litigation and labor disputes, with special experience in the health care, technology, insurance, manufacturing, government contracting, hospitality and retail industries. His practice includes all facets of employment discrimination, harassment, wage and hour, ADA, FMLA, ERISA, covenants not to compete and employment torts, as well as labor arbitration, union campaigns and unfair labor p...

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 ...

Bruce Serchuk focuses his practice on tax issues as they relate to debt securities, particularly tax-exempt bonds. What do you focus on? Public finance I advise clients regarding the tax aspects of tax-exempt bond transactions, acting primarily as bond counsel, borrower’s counsel and underwriter’s counsel. I have participated in a wide variety of bond transactions, including financings for governmental facilities, student loans, multifamily housing, stadiums and nonprofit hospital...

Christopher Mangin, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Leveraged Buyouts and Private Equity Law and Mergers and Acquisitions Law. Christopher, 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 Christopher is held by other top lawyers in the same geographic and legal practice area.

Lynn E. Calkins is the practice group leader for Holland & Knight's Washington, D.C. Litigation Group and serves on the firm's Directors Committee. Ms. Calkins is a trial lawyer and appellate advocate, concentrating in the defense of claims under the Fair Housing Act and Americans with Disabilities Act brought against real estate developers, hotels, retailers and local governments. In addition to this focus, she has handled numerous business and real estate disputes, zoning appeals, regul...

Rich Gold is a partner practicing in the areas of legislative and environmental law, emphasizing strategy development, lobbying, legislative and regulatory counseling, and creative solutions to corporate, non-profit, and governmental issues at the federal level. He is the leader of Holland & Knight's Public Policy & Regulation Practice Group, which has been ranked among the top 10 law and lobby firms in Washington, D.C. by Influence magazine the last several years. Mr. Gold has been r...

Kevin M. Bell is a top attorney recognized by Best Lawyers in the practice area(s) of FDA Law. Kevin M., 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 Kevin M. is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/warin-f-joseph/ .