Skyfox
DHL does not operate a central recruiting office for flight crew, simply because there is no single global airline. To name but a few, you have:
European Air Transport - Main EU operator (757/A300)
DHL Air UK - Secondary EU operator (757)
DHL Aero Expresso - The Panamanian outfit (727)
Vensecar - The Venezuelan outfit (ATR)
SNAS - The Bahraini outfit (Convair/Metro)
Swiftair - The Spanish outfit (727/Convair/E120)
Astar - The US outfit (727/A300/DC8)
And so on and so forth. However, if you'll let me know (my PM if you prefer) where in the world you're seeking employment, and on which type, I'll be happy to point you in the right direction.