Robert Greenberg is founder and CEO of G&H International Services Inc., a Washington D.C. based consulting firm that provides services to enhance the safety and security of communities across the nation.  In particular Mr. Greenberg works with the Federal government to develop and implement initiatives and programs to assist the local, state and federal emergency services community as well as the critical infrastructure and key resource (CIKR) sectors.  Mr. Greenberg’s current focus is the implementation of the Virtual USA initiative undertaken by the Department of Homeland Security’s Science and Technology Directorate which is applying social media to catalyze a technical and cultural shift in the way in which the public safety community collaborates and shares information.