Second will be with manager if first was with Recruiter/HR, where he will be asking you about your experience and exposure to RH and he will check if you are fit culturally as well as professionally to his team, check your ability to openness and communication. if first was with manager then it will be technical round based on profile could be 2 or multiple ppl in group/panel, where they would set first with intro part and then go to job specific questions technically, Just practice/prepare yourself on JD as it is mentioned. Go through Red Hat resources. For TSE, Troubleshooting is most important, Case handling and how to manage escalation will be checked, High availability, Any SAP related exp would be good as well.