About

William Mastrianna is an attorney at Covington & Burling LLP in Washington, DC, where he focuses his practice on general practice matters. Based in the heart of the nation’s capital, he brings a thoughtful, detail-oriented approach to legal work and is committed to helping clients navigate a wide range of legal issues with clarity and confidence. His practice is grounded in careful analysis, responsiveness, and a strong understanding of how to support clients in complex and evolving legal environments. As a general practice attorney, Mr. Mastrianna is prepared to assist clients with matters that require practical judgment, sound legal insight, and an ability to adapt to diverse needs. He values clear communication and works to ensure clients understand their options and feel informed throughout the legal process. Whether addressing transactional concerns, advising on day-to-day legal matters, or helping clients manage broader legal challenges, he strives to deliver reliable counsel tailored to each client’s goals. Mr. Mastrianna is licensed in Washington, DC, under bar number 5327960. His work reflects a professional commitment to precision, integrity, and client service, making him a trusted resource for individuals and organizations seeking general legal guidance in the Washington, DC area.

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