Jonathan Greenspun is a Managing Director and serves as Mercury’s key contact for New York City public affairs. His core expertise includes New York City government relations, strategic communications, crisis communication, media relations and community grassroots organizing.

Appointed in 2001 by New York City Mayor Michael Bloomberg to serve as Commissioner of the Mayor's Community Affairs Unit (CAU), Mr. Greenspun possesses in-depth knowledge of how City government operates and how decisions get made. Under his leadership, the agency played a pivotal role handling intergovernmental coordination, planning and project management with many citywide initiatives and special City Hall projects.

Prior to working for the City of New York, Mr. Greenspun spent seven years working for Governor George E. Pataki where he served as his Executive Assistant. Based in the Governor's New York City Executive Chamber, he was a member of the Governor's office of community affairs. The office is comprised of liaisons to various ethnic communities within the State of New York. Part of Mr. Greenspun's responsibilities included the crafting and implementation of public policy, accompanying the Governor to all events downstate, speech writing and providing various constituent services.

Jonathan’s political work includes Mike Bloomberg's 2001 mayoral campaign; Rick Lazio's 2000 Senate campaign; Al D'Amato's 1998 Senate Campaign; and Governor Pataki's 1994 and 1998 gubernatorial campaigns.

Having been taught from a very early age on the importance of giving back to his community, Mr. Greenspun serves on a number of prestigious boards including: Mayor Bloomberg’s representative to the Board of The Museum of Jewish Heritage- A Living Memorial to the Holocaust; The New York City Chapter of the League of Conservation Voters; a member of the Executive Committee of the Jewish Community Relations Council of New York; The Jewish National Fund; and as President of his local Synagogue.

Born in Brooklyn, Jonathan and his wife Rosesara currently reside in Riverdale with their two sons Andrew and Matthew and daughter Liliana.