All Employees: Construction: Heavy and Civil Engineering Construction in Maryland was 17.50000 Thous. of Persons in January of 2020, according to the United States Federal Reserve. Historically, All Employees: Construction: Heavy and Civil Engineering Construction in Maryland reached a record high of 24.80000 in January of 1990 and a record low of 14.50000 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Construction: Heavy and Civil Engineering Construction in Maryland - last updated from the United States Federal Reserve on April of 2024.