One Call Concepts, Inc. 7223 Parkway Drive Suite 210 Hanover, MD 21076 President Tom Hoff (410) 712-0082 Chief Financial Officer Mike Horne (410) 712-0202   Controller Dan Florenzo (410) 712-0082 Director of Systems Division Randy Peterson (414) 259-1047       home / about us / services / locations / in the news / events / employment / contact © 2010 One Call Concepts, Inc. All Rights Reserved.