Maryland Portable Concrete, Inc., one of the last family owned and operated businesses in the region, is the largest producer of ready mix concrete in the Maryland-Delaware-Pennsylvania, Tri-State area. In 1980, with local demand for concrete on the rise, Marty and Carolyn established Maryland Portable Concrete, a conventional ready mix concrete operation. Today, Maryland Portable Concrete owns and operates two plants in Harford County and two in Cecil County. Gregory White, now President and sole owner, presently directs all company operations. The company employs over one hundred and fifty employees, all residents of local counties.