The Administration wing of GSO is responsible for:

* Personnel Administration
* Recruitment
* Estate Management
*Transportation Management

GSO has a sanctioned staff strength of 633 posts including doctors, engineers, scientific assistants, nurses, paramedical staff, accounts and administrative staff. All establishment matters of GSO staff including maintenance of service records, pay fixation, sanctioning of advances/loans, procurement and distribution of office equipments etc are effectively carried out by the Administration wing.
     The Recruitment section deals with all matters relating to recruitment of staff at all levels and their periodical promotions.
       There are about 5000 quarters in the Atomic Energy township at Kalpakkam and about 450 quarters in the Atomic Energy township at Anupuram. The estate management section is responsible for house allotments, maintenance of seniority lists for allotment of quarters, guest house and multipurpose hall allotments. Allotment of accommodation in hostels is also handled by this section. A number of shops run by the cooperative society and other private parties is also under the administrative control of this section.
      There are 26 buses, 7 lorries and 15 jeeps and cars under the transportation section which is responsible for providing transport to all officers and staff members.