Step 1: Identify the administrative structure of the Supreme Court.
The Supreme Court of India has a separate administrative wing that manages its day-to-day operations, staffing, records, and official correspondence, headed by the Secretary General.
Step 2: Distinguish judicial from administrative roles.
The Chief Justice of India and other judges are judicial officers, not administrative officers. The Secretary, Department of Justice is a Government of India official outside the SC.
Step 3: Confirm the correct answer.
The Secretary General is the senior-most administrative officer of the Supreme Court of India, responsible for administrative coordination.
\[ \boxed{\text{Secretary General}} \]