Here is the link again to various certifications.
My suggestion to you is this. Whatever exam you take your fellow co workers will only know whether you passed or failed. So make sure the one they know you are taking is one you will pass. Hint, do not go for the most difficult on the list, pick one you know you will pass.
It will do you no good to be known for failing something multiple times even if you do eventually succeed in passing, all you will be known for is having failed before you passed, hardly an enviable position. But all I can do is dispense free advice.
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