About

Colleen O’Neill is an attorney with Ernst Young LLP in Washington, DC, where she practices in the firm’s general practice area. Based in the nation’s capital, she brings a professional, detail-oriented approach to her work, helping clients navigate a broad range of legal matters with clarity and confidence. With a focus on practical problem-solving, Ms. O’Neill is committed to delivering sound legal guidance tailored to each client’s unique needs and goals. Licensed to practice in the District of Columbia, Bar Number 4280962, Ms. O’Neill is known for her thoughtful counsel and dedication to responsive client service. She understands that legal matters often require not only technical skill, but also clear communication and a steady, solutions-oriented perspective. Whether addressing routine matters or more complex issues, she works to provide reliable support and well-reasoned advice throughout the process. Ms. O’Neill’s practice reflects a commitment to professionalism, integrity, and client-focused service. She approaches each matter with care and attention to detail, striving to help clients move forward with confidence. For individuals and organizations seeking a knowledgeable Washington, DC attorney with a practical general practice background, Colleen O’Neill offers trusted guidance and a strong commitment to effective representation.

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