When you hear word Exadata , what first thing comes in your mind? Now the time comes for Exadata DMA rather than traditional DBA who can manage entire setup including network, storage, server, operating system, database, grid, asm etc...
To get this job you have to demonstrate your skill to the customer which is definitely 50% fulfilled if you are exadata certified. If you go to any Oracle customer who are on traditional oracle setup, all are thinking switch to the exadata machine because of many benefits for business as well operational.