Mr. Untermyer began his career as a Legal Advocate with the Urban Justice Center in New York City. From a basement legal clinic in a Harlem soup kitchen, he helped hundreds of low- and no-income New Yorkers avoid homelessness, eviction, or loss of emergency government benefits under attorney supervision. He proceeded to serve in a variety of management positions within the Urban Justice Center and helped launch a new legal office in the Bronx’s Fordham neighborhood, where a third of all residents live below the poverty line.

From 2015 to 2017, Mr. Untermyer served as Deputy Director of the Historic Districts Council, a venerable nonprofit organization dedicated to preserving significant buildings, neighborhoods, and public places in New York City. In addition to his leadership duties, Mr. Untermyer helped coordinate policy advocacy campaigns, increased and broadened the Council's funding sources, and launched a series of diversity initiatives that incorporated fresh faces and voices.

Mr. Untermyer is an accomplished keyboard player, and has appeared in Europe, Canada, and the Caribbean. In addition, Mr. Untermyer is a passionate transportation activist, and was named an Emerging Leader in Transportation by the Rudin Center in 2015. In 2016, he was featured in The New York Times for hatching and implementing a plan to improve the world's biggest and busiest bus terminal by creating a performing arts center in a dormant space within the structure.

Adrian Untermyer graduated from the University of Colorado School of Law in May 2020, and is set to begin a judicial clerkship in the fall. Mr. Untermyer also holds a Master of Public Administration from New York University’s Wagner School of Public Service and a Bachelor of Arts in Metropolitan Studies from the University’s College of Arts and Science, where he was a University Honors Scholar and a recipient of the Founders Day Award.