About

Brendan Costello is an attorney based in Washington, DC, serving clients as part of the U.S. Department of the Treasury. With a practice focused on general practice matters, he brings a broad legal perspective and a steady, detail-oriented approach to his work. Bar number 5851704 reflects his active legal licensure and his commitment to maintaining the professional standards expected of attorneys practicing in the nation’s capital. Known for his thoughtful, pragmatic approach, Mr. Costello works to address legal issues with clarity, precision, and responsiveness. His background in general practice supports a versatile understanding of a wide range of legal concerns, allowing him to adapt to complex matters while keeping client needs and legal compliance at the forefront. In a fast-paced and highly regulated environment, he values thorough preparation and careful analysis to help ensure every matter is handled with attention to detail. Based in Washington, DC 20220, Brendan Costello is committed to providing reliable legal service grounded in professionalism and sound judgment. He understands the importance of clear communication and diligent representation, and he approaches each matter with a focus on practical solutions. Clients and colleagues alike can expect a disciplined attorney who brings integrity, consistency, and a strong work ethic to every aspect of his practice.

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