Candidate should have adequate knowledge on Oracle Applications (Must have worked on 11i as well as R12) and Oracle Database(9i,10g, if he knows 11G better). Also he should be aware of RAC,PCP,Discoverer etc
Should be able to troubleshoot issues & provide performance tuning recommendations. Should be able to attend calls with the customer in escalations. Should be very strong in Core DBA Architecture & Apps Architecture. Should have good communications & customer handling skills