S. Yan Sin is a partner in the Matrimonial and Family Law Group. Yan was the associate law clerk for the Hon. Ellen F. Gesmer, Associate Justice, Appellate Division of the Supreme Court of New York, First Department, when Justice Gesmer was a judge in the Matrimonial Part of the Supreme Court of the State of New York, New York County. Subsequent to her clerkship, Yan practiced family law in a boutique matrimonial law firm. Yan has experience litigating divorce, custody, and support matters in Family Court and Supreme Court. She also has a background in immigration law with experience in family-based petitions and the naturalization process. Yan serves on the Attorney Grievance Committee of the First Department. She also serves on the Board of Directors of the Adoptive and Foster Family Coalition of New York, a statewide organization that provides support, information and advocacy to foster, adoptive and kinship care families. Yan is an active member of the Asian American Bar Association of New York (AABANY). In her spare time, she volunteers at pro bono clinics providing free legal advice and counsel and at a summer camp teaching mock trials to middle school students.

A graduate of the University of Virginia and New York Law School, Yan lives in Manhattan and is active in the Chinatown community. She is conversant in Cantonese and loves yoga and jigsaw puzzles. Yan is admitted to practice law in New York and New Jersey.