National Cement Company is one of the American subsidiaries of the international Vicat Group. The Vicat Group, present in seven countries, manufactures cement, produces ready-mixed concrete and aggregates, and conducts other activities that are parallel or complementary to its core operations. In 1817, Louis Vicat discovered artificial cement. Cement manufacturing has been the Vicat Group's major activity for more than 150 years. His son, Joseph created the Vicat Company in 1853. The group continues expanding under current President Jacques Merceron-Vicat. The Vicat Group has a total of more than 6,600 employees in France, the United States, Turkey, Senegal, Switzerland, Egypt and Italy. National Cement Company has a location in Lebec, Calif.