About

Grenfel Calheiros is an attorney with Simpson Thacher & Bartlett in New York, NY, where he contributes to the firm’s General Practice. Based in New York City, he brings a thoughtful, detail-oriented approach to legal matters and is committed to helping clients navigate a wide range of issues with clarity and confidence. Licensed under Bar Number 4342952, Mr. Calheiros combines professionalism, responsiveness, and practical judgment in his work, reflecting the high standards associated with one of the nation’s premier law firms. In his practice, Mr. Calheiros focuses on providing reliable legal support tailored to each client’s needs. He understands that effective representation requires not only legal knowledge, but also the ability to communicate clearly, anticipate challenges, and develop sound strategies that align with each client’s goals. Whether assisting businesses or individuals, he approaches every matter with diligence and a strong commitment to client service. Mr. Calheiros’s practice is grounded in a client-centered philosophy and a dedication to delivering careful, well-reasoned legal guidance. Clients value his ability to handle matters with professionalism and discretion while remaining accessible and responsive throughout the legal process. As part of Simpson Thacher & Bartlett’s General Practice team, he continues to build a reputation for dependable advocacy and a steady, solutions-focused approach to legal representation.

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