Iske piche reason hai...deputy collector eak aisa position hai jiska posting as BDO and CO bhi hota hai. And aaj bhi bahot saare states me dekhne ko milta hai Isiliye waha aaj bhi deputy collector post exist krta...wahin bihar me 2010 ne bihar administrative services rules me changes hua jiske anusaar koi bhi bihar administrative services ka officer ka position sub division se nhi niche nahin kiya jayegaa isiliye yaha senior deputy collection ka post hota hai joh ki level 9 ka post hai.

Jab aapka BAS cadre me Senior deputy collector ke post pe selection hota hai toh waha posting kuch iss tarike se hoti hai:

District posting me aapko district ke kisi department ka head bna diya jayega or aapka designation SDC rhega. Eak district me bahot saare departments hote jaise ki establishment section, Nazarat, disaster management cell, etc and saare department ka head District Magistrate (DM) hote hai. Aap reporting authority DM hoga.

Sub division level pe bhi posting hota hai waha SDM ke role me aapka posting kiya jata hai. Kbhi kbhi bahot bada sub division hai toh eak additional post create kiya jata hai ASDM ka aur waha responsibilities distribute krdiya jaati hai.

Eak posting hota hai as sub divisional grievance redressal officer ke tor pe inka posting bhi sub division me hi hota hai.

Iske alawa OSD ( Officer on special duty) ke tor pe bhi inka posting hota district me yaa kisi ministry, mission, commission etc me

Iske alawa agar secretariat me inka posting hota hai toh as under secretary ke post me hota.

Iske alawa governor, Cm office me bhi hoti posting ya kisi minister ke secretary ke tor pe bhi.

Kbhi kbhi as jail superintendent ke tor pe bhi inki posting ki jaati agar uss zile me woh post vacant hai toh, iske alawa DTO, and nagar nigam me bhi hoti posting.

Yahi officer km se km 12 saal ke baad inko promotion milta phir ye ADM rank pe aajate. Phir 15-18 rules ke according aise jyada tym lgjata like 22 years IAS me promotion ke liye.

Kaafi versa tile job profile hai BAS officers ka.

Hi Nitesh,

SDM is Sub-divisional magistrate while Senior deputy collector that id ADM i.e. Additional District Magistrate who is just after the DM i.e. District Magistrate or collector.

Now, here SDM is responsible only for a Revenue division or Sub-division or Sub-district. And, he is below ADM as he is responsible for whole district. In bigger cities like Patna we also have a post between collector and ADM that is Senior deputy collector of which you are talking. The work of three of these personalities is almost the same but in larger city one or two people are not sufficient for all the handling and management. Obviously, by promotion SDM becomes ADM and above.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!