Hi @myvelmurugan!
TL;DR yes you can, but… 
Content Management
You can easily synchronize oracle’s public yum content using Katello.
If you want to use oracle’s ULN repos you cannot sync the content directly using upstream Katello.
If you need this you should think about using orcharhino, which is a downstream product of Foreman/Katello and adds some additional features for managing oracle Linux.
Subscription Manager
OracleLinux does not ship subscription-manager and all other required tools that are needed to attach Linux hosts to Katello.
Therefore you need to play around to get this running for upstream Katello as @John_Mitsch mentioned before.
Or if you are using orcharhino you get access to an OracleLinux client repo that can be used to easily attach OracleLinux 7 and 8.