IAS/IPS Ranks: S NoIndian Administrative Service (IAS)Indian Police Service (IPS)Indian Forest Service (IFoS)Indian Revenue Service (IRS) 1Assistant CollectorAssistant Superintendent of PoliceAssistant Conservator of ForestsAssistant Commissioner of Income Tax 2Collector/Deputy Commissioner/Deputy Secretary / Deputy DirectorsAdditional Superintendent of Police/ Superintendent of PoliceDeputy Conservator of ForestsDeputy Commissioner of Income Tax 3Collector/ Deputy Commissioner / Additional Secretary / Joint Secretary / DirectorsSenior Superintendent of PoliceDeputy Conservator of ForestsJoint Commissioner of Income Tax 4Deputy Inspector General of PoliceConservator of ForestsAdditional Commissioner of Income Tax 5Secretary/ Commissioner & SecretaryInspector General of PoliceChief Conservator of ForestsCommissioner of Income Tax 6Principal Secretary/Financial CommissionersAdditional Director General of PoliceAdditional Principal Chief Conservator of ForestsChief Commissioner of Income tax 7Director General of PolicePrincipal Chief Conservator of ForestsDirector General of Customs & Excise/Board & Tribunal Members 8Chief Secretary/Chairman Administrative Tribunal etcDirector General of Police (Head of State)Principal Chief Conservator of Forests (Head of State)CBDT Chairman/Board Chairman etc