Thanks CourtesyIT, I was looking for following roles :
NCM Roles: NCM Administrator - This role has unlimited access to NCM functions and the application NCM Engineer - This role has Administrator privileges but cannot view the device configuration transfer status for all users. WebUploader - This role has read/write access on network devices but cannot change device configurations without Administrator approval when configuration change approval is enabled. This role also does not have access to the NCM Application. WebDownloader - This role read only access to NCM and the ability to download network device configurations. This role also does not have access to the NCM Application. WebViewer - This role can only read network device configurations. This role also does not have access to the NCM Application. None - This role cannot access NCM features and functions