For a new pump, the plumber will choose a low spot, cut the slab, dig a pit, and set a liner, pump, check valve, and discharge line. For a replacement, they'll check whether the pit and pump are sized for how much water your lot actually sees in spring.
The discharge route matters on a Pembroke property: it should carry water away from the foundation and keep it off the leach field. Ask whether a battery or water-powered backup suits your home, and confirm with the plumber whether the job needs a permit through Building & Inspectional Services.
If your basement floods often, ask about a high-water alarm, and about raising the water heater and other equipment if you are in a mapped flood zone.