First MTR South Western Trains will be taking over the South Western Franchise from August.
The company is determined to "deliver a revolution in services for passengers" and have announced commuters will experience faster journey times.
Transport Secretary Chris Grayling describes this as "great news for rail passengers".
First MTR have been awarded the new seven year franchise and will takeover from StageCoach. The firm will oversee a £1.2 billion investment to improve journeys for millions of train passengers.
This investment will be used to refurbish trains with charging sockets, replacing seat covers and redoing toilets.
There will be faster journeys across the region, and better connections for the Island Line.
The new contract will see more Sunday services across the network, and the launch of a new mobile phone app, which will include live information on seating availability and crowding levels. Free Wi-Fi will be provided at all stations and on-board mainland trains.
There will be a new Delay Repay compensation system that will include delays of 15 minutes or more, and with automatic claims for smart card season tickets and advance purchased tickets.
Improvements will be made to stations, which include refurbishing waiting rooms and additional seating.