About

Lindsay Marie O’Neil is a seasoned attorney with Mayer Brown LLP in Chicago, where she focuses her practice on banking and financial markets and services. Based at 71 S Wacker Dr Ste 1000, she counsels clients on a range of matters involving the financial sector, bringing a clear understanding of the complex regulatory, transactional, and commercial issues that shape today’s banking environment. Her work is informed by the evolving needs of financial institutions, market participants, and other businesses operating in highly regulated industries. Known for her practical and detail-oriented approach, Lindsay works closely with clients to help them navigate sophisticated legal challenges with confidence and efficiency. She values strong client communication and strives to deliver thoughtful, business-minded guidance tailored to each client’s objectives. Whether addressing day-to-day operational issues or more nuanced matters in the financial markets, she is committed to providing responsive support and reliable counsel. Lindsay’s practice reflects a dedication to helping clients manage risk, move forward strategically, and respond effectively to regulatory and market developments. As part of Mayer Brown LLP’s respected platform, she contributes to a team known for handling complex legal issues with precision and professionalism. Her commitment to client service and her focus on banking and financial markets make her a trusted resource for organizations seeking informed legal guidance in Chicago and beyond.

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