Trending @Capgemini; How to change BU. I am in CIS. Going to bench next month. Need to change BU

I used to work as a Java developer. Suddenly, my BU was changed and I was moved to ServiceNow. I am currently in CIS. Even after receiving training in ServiceNow, I wasn't assigned to any project. From next month, I have been put on the bench. In the CIS BU, work is done only in ServiceNow. But I want to work in Java — is that possible in the CIS BU?

I want to change to CIS BU what is the process?