Leon Ransmeier was born in New York in 1979. In 2001, he graduated with a B.F.A. in furniture design from the Rhode Island School of Design in Providence.
In 2004, Ransmeier founded Ransmeier Inc., an industrial design practice based in New York City. In 2007, he co-founded the design firm DBA with partners Erik Wysocan and Patrick Sarkissian, where he worked as creative director of design for three years.