I think the only really effective existing technologies for "ingesting" disparate data are called "data scientist" and/or "software engineer". As written using

I think the only really effective existing technologies for "ingesting" disparate data are called "data scientist" and/or "software engineer". As written using the word "data" the question doesn't really make sense to me because that implies structure. But it implies that you want to aggregate data from multiple sources into something coherent. If this is not the case, then you could consider something like a wiki. Or consider it anyway as a starting point. Or maybe Elasticsearch. With the current information as specified, the exercise seems impossible and pointless. As you said, more information is required. What specific data would be useful to which specific individuals in those organizations or external to them and how would they use that specific type of information? Start by detailing that and then figure out how to get there. This sounds like an exercise created by a non-technical person who was not interested nor could understand the requirements. So you have to do requirements engineering and the primary risk for the project is the incompetence of the person who gave you the vague data aggregation task and their ability to waste your time.