I have never worked for Dyncorp but spent 5 years in the Balkans on various contracts for outfits such as Halliburton, UN and some governments. Dyncorp seemed to be always sniffing around the edges of the big contracts.
They had a big scandal while I was there. Basically a cover up when some of their employees were - allegedly - involved in human trafficking. Cover ups tell you something about an outfit: either about their ethics or their ability to hide things. You decide.
Since then, have bumped into many expats working with them around the Mid East and elsewhere who seem to be basically satisfied so perhaps they have sorted their collective sh1t out.
The word 'collective' is used deliberately; check out the company structure, some sort of cooperative.
In any case good luck.