All Employees: Professional and Business Services: Scientific Research and Development Services in Maryland was 41.58480 Thous. of Persons in March of 2024, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Scientific Research and Development Services in Maryland reached a record high of 41.58480 in March of 2024 and a record low of 18.99711 in April of 1990. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Scientific Research and Development Services in Maryland - last updated from the United States Federal Reserve on May of 2024.