CERN builds almost next to nothing anymore. Half a century ago they really did do RF cavities, cooling, electronics etc. Not anymore. It is either COTS (DELL, Alterra etc.) or chiefly vendor bidding for some custom parts. Much like what NASA (from Rocketdyne, TRW to Boeing and SpaceX) or copycat ESA (Airbus, DLR, BAE's suppliers) does today.

It is a project bureau. Everything is essentially outsourced, leaving a management shell institute to parade for VIPs. Actually they are close to completely forgetting what they already knew in the hard sciences domain.