Cognate has 201-500 employees per linkedin between Maryland and Memphis. Those seem like very generic positions being filled and they obviously contract with a lot of other companies than NWBO. I'd imagine it is pretty normal they have a job listing board with multiple openings at any one time considering the size of the workforce.
To your credit, 15 openings in a 3 day period (Memphis specific) would seem to make you think they are opening a new line and/or got a new contract.
What makes you think this is different than looking at their job postings any other day?
Just curious if there is something else I'm missing.