Lauren Koster
Managing Partner | New York and Connecticut
Ph: (914) 609-6642 • lauren@commonlight.legal
Lauren is a New York City-based attorney who represents multijurisdictional tax-exempt entities (public charities, private foundations, and social welfare organizations) as their outside general counsel and leads the firm's charter and independent school practice. She advises clients on a wide range of matters, from entity formation and governance through employment, compliance, and grantmaking. She manages direct representation and systemic legal advocacy on behalf of charter schools and charter management organizations, and has prevailed in administrative appeals before the Connecticut State Department of Education and Connecticut Superior Court and is actively pursuing an appeal in the Connecticut Appellate Court.
Throughout her legal career, Lauren has merged interests across litigation and transactional practice in service of the public good. She clerked in the U.S. District Court for the District of New Hampshire and for the Massachusetts Supreme Judicial Court. She served as a Rappaport Fellow for Law & Public Policy at the Massachusetts Department of Elementary & Secondary Education in the Office of General Counsel and as a Skadden Fellow, prior to that law firm's capitulation to the Trump Administration. As a Skadden Fellow, she proudly represented children as a court-appointed advocate in juvenile court and child welfare matters.
Lauren is also a former educator, which informs her work with charter and independent schools: she knows, not abstractly, what is at stake when a school's authorization or funding is challenged.
Active Bar Memberships
Federal Court Admissions
Outcome-forward representation.
Secured favorable declaratory ruling from Connecticut SDE on charter funding question
Prevailed on question of reimbursement to charter schools for special education costs from resident school districts, reinforcing charter schools' right to recoup those costs in the same manner as other school choice programs throughout the State. Successfully defended against administrative appeals from Waterbury and New Haven Boards of Education in Connecticut Superior Court.
Brought New York nonprofit into compliance for first time in years
Reviewed and redrafted outdated bylaws and policies to reflect a realistic governance structure. Supported implementation with drafted resolutions, step-by-step guidance, and rapid responses to questions — all for a predictable, flat fee.
Reunited Colombian father with son unlawfully retained in Connecticut
Successfully pursued a petition under the Hague Convention to reunite a father with his son after the child's mother refused to return to Colombia with the child after a holiday to the United States. Father and son happily returned together to their home and are thriving.