In the revenue department, the deputy collector (also called Deputy District Collector) is usually a tehsildar who reports to the District Revenue Officer (DRO), who is also called the Additional District Collector and is the overall in-charge of the revenue department for the district. The DRO in turn reports to the District Collector (also called District Commissioner) who is in charge of overall management of the district across all departments. Deputy collectors are hired through State Service Selection Commissions, whereas DRO and District Collectors are usually Centre Civil Services employees appointed to the state cadre.