M. Sean "Sean" Royall

Ivan Schlager is an international trade and national security partner in the Washington, D.C., office of Kirkland & Ellis LLP. Ivan provides counsel on structuring, negotiating and documenting transactions to address regulatory issues, including approval by the Committee on Foreign Investment in the United States (CFIUS). He represents a diverse group of clients ranging from defense companies, major telecommunications providers, and media and technology companies to private equity firms a...

For more information, please visit www.gibsondunn.com/lawyer/mueller-ronald-o/ .

Raymond J. Sherbill is a top attorney recognized by Best Lawyers in the practice area(s) of Closely Held Companies and Family Businesses Law, Corporate Law and Tax Law. Raymond J., who practices law in Bethesda, Maryland, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Raymond J. is held by other top lawyers in the same geographic and legal practice area.

Andrew Rubin’s practice is focused on helping nonprofits and state, local, and tribal governments finance development projects that support local communities. Andrew also serves as a trusted adviser to nonprofits for tax and transactional matters. My focus I believe it is important to always have the right tools for a project. My toolbox includes federal tax credits, tax-exempt bonds, property assessed clean energy (PACE & C-PACE), state and local tax incentives and tax increment fi...

Joanne Jacobson is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Joanne, 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 Joanne is held by other top lawyers in the same geographic and legal practice area.

Nancy P. Regelin uses her skills as a strategic thinker, communicator, and manager to implement the vision of land owners, developers, and creative consultants to create great places for us to live, work and play. One of her true strengths lies in the trust and relationships she builds with elected officials, staff, community leaders, professional consultants, and other attorneys that she can draw upon to creatively solve problems. In a recent assignment, Nancy was selected as outside local z...

Paul J. Kiernan is a trial lawyer and appellate who focuses on administrative-agency litigation, real-estate disputes, corporate-governance litigation and local government law. He represents businesses, developers, institutions, lenders, hotels, landlords, and tenants on land use, condemnation, development and property-management disputes and matters involving distressed real estate. Mr. Kiernan has substantial experience in general commercial litigation, commercial and international arbitrat...

James N. Mastracchio is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. James N., 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 James N. is held by other top lawyers in the same geographic and legal practice area.

Doug Patin has an extensive government contracts practice. While this work has involved the entire spectrum of traditional government contract disputes, he has developed extensive experience in various aspects of government contract law including: federal fraud and False Claims Act issues, bid protests, mediation, and contract dispute litigation with the federal government. Doug's extensive teaching and writing efforts keep him current on changing case law and developments in the field. Doug ...

Making strategic decisions for the future can be challenging during a family crisis like divorce. Jonathan Dana, a compassionate and straightforward divorce attorney with more than 35 years of experience, helps clients navigate these difficult times to make educated, informed and optimal decisions for their circumstances. “I present clients with options, letting them know that my role is to guide, rather than tell them what to do,” says Jonathan. “It’s important that t...