This would not be considered a traditional "working line" pedigree IMHO. The sire's pedigree is kind of a mish mosh of lines, some show lines, some North American and a couple of working line dogs. I see no working titles until the 3rd generation and that is on a West German Showline dog.
The dams lines are pretty much a mix as well, I see a bit of everything in there, a bit more working and Czech but still not what one would consider cohesive.
Where are you located? Are you planning on pursuing Schutzhund for sport purposes or are you looking for a personal protection dog? There are quite a few great breeders that I can think of off the top of my head and I'm sure others can as well, we just need to know a bit more about you, where you are, your prior experience and what you hope to do.