The long serving assistant coach will not be seen on the Red and Golds' bench next season.
The number two of the Kolkata club have decided to pursue further studies in coaching and will travel to England to attend a course.
"The way AIFF is dealing with it, I think having an A license should be my first priority. So, I have decided to attend the course in England. Also one needs good fitness to pass the test, so I guess this is my best time to get it done," Ranjan elucidated.
Ranjan had experiences of coaching local teams like Tollygunge Agragami, Southern Samity and Calcutta Customs Club before joining Trevor Morgan's coaching staff.
"This was my first stint at an I-League club. I have already informed Armando (Colaco) about my decision. I didn't want the club to face the problem midway into the season, so I have filed the resignation well in advance," he further added.
However, Ranjan has offers from a few local clubs and may take charge in the IFA tournaments before leaving for England in September,
On the other hand, East Bengal officials have decided to start their pre-season training session a bit later, with the footballers being afforded the chance to catch the late night matches of the World Cup. The club had earlier decided to start the sessions on 18th June, but have decided to postpone it for at least 10 days.