I have enrolled my apple account as Individual for iOS development program. Now I wish to convert it into Company/Organisation account.

https://stackoverflow.com/questions/30376643/convert-ios-developer-account-from-individual-to-company

If you have enrolled as an individual and need to convert your individual account to a company account, please contact us.

https://developer.apple.com/support/enrollment/

Program Roles and iTunes Connect Roles: https://developer.apple.com/support/roles/

Add a team member to your Apple Developer Program: https://getmobipromo.com/help/add-a-team-member-to-your-apple-developer-program/

Enrolling as an Organization: https://developer.apple.com/programs/enroll/