Professor Anup Surendranath, Deputy Registrar (Research), who was appointed more than a year ago on contract, resigned on July 30, the day Memon was hanged to death two hours after the court had upheld the death warrant.
His resignation, which has come in the midst of a raging debate over death penalty and whether it should be used as a form of the State avenging a crime, has been accepted and he has been relieved, court sources said.
There are nearly 20 deputy registrars, a few of whom have been inducted from outside judiciary.
"It would be silly and naive to see the events of the last 24 hours at the Supreme Court as some triumph of the rule of law - the two orders at 4 pm on 29th July and 5 am on 30th July (and the reasoning adopted therein) are instances of judicial abdication that must count amongst the darkest hours for the Supreme Court of India.," Prof Surendranath had remarked on July 30.
He is a faculty member of National Law University, Delhi, and Director of Death Penalty Research Project. He was also associated with the filing of the petition for stay of Memon's death warrant.
"I have been contemplating this for a while now for a variety of reasons, but what was played out this week at the Supreme Court was the proverbial final nail - I have resigned from my post at the Supreme Court to focus on death penalty work at the University.
"It is in many ways liberating to to regain the freedom to write whatever I want and I hope to make full use of that in the next few days to discuss the events that transpired at the Supreme Court this week," he wrote on a social networking site.
When contacted, he said he has nothing more to state than what he has posted.
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