I’m curious as to which type of contractor I need to install a sump pump. Would that be a plumber or an electrician, maybe?
Sump pump requires electrical conection, pump installed by Plumber if conected to plumbing system, if it is to discharge to an exterior location, then any one can install the sump pump.
If its just replacing a pump, call a plumber. If your installing a whole new sump system call a masonry company . they’ll set up the subcontractors needed.but cutting the concrete and replacing it properly should be the most important thing.