The CES group (CESGruppe) headquartered in Velbert, Germany, is an internationally leading manufacturer of state-of-the-art locking and security systems. Established in 1840, it is still a medium-sized family business. Under the CEScylinder brand, it markets a comprehensive range of mechanical cylinders to meet a large variety of customer and building requirements. Through its two subsidiaries CEStronics and CESlocks, the CES group is active in the growing markets of electronic and mechatronic locking engineering and special locks. The group has about 450 employees and generated sales of 41 million euros in 2011. In addition to its Velbert production location, CES also operates a manufacturing facility in Romania. CES has sales offices in many European countries and is globally represented through various partner companies.