It’s both. I think the distinction can be reasonably clean—science aims at understanding via explicitly modeling the process (not necessarily mathematically but often) and then testing the model. The process of building the LHC was engineering, the experiments themselves are part of science.
I think the science/engineering-distinction used by Douglas Knight and Lumifer provides no good model, so you have to ask them.
It’s both. I think the distinction can be reasonably clean—science aims at understanding via explicitly modeling the process (not necessarily mathematically but often) and then testing the model. The process of building the LHC was engineering, the experiments themselves are part of science.