It doesn't say that we've been working with them, just that they knew about us and checked out the technology and it was successfully used.
It's quite possible that they did that without MK even knowing about it until after the fact. If that's the case, it tells me a couple of very valuable things:
1) The technology has been proven for it's intended use.
2) Seeker must have some proprietary claim on the technology or One Source would have continued using it on their own and just cut seeker out.
As far as not hearing about it until now, it tells me that these guys like to keep their cards close to the vest. It could well be that they are accustomed to working with confidential clients (like the government) and have what it takes to make this a success.
Here's hoping that some of those available contracts come our way and that they add up to tens of millions in PROFITS!!!