American call centre company Conduit is creating 600 jobs in Cardiff, to provide homecare service for British Gas.
Conduit already employs nearly 2000 people in South Wales.
First Minister Carwyn Jones said "[this is] yet another indication that Welsh government policies are having a beneficial effect supporting the economy and creating jobs during these difficult times. Professional and financial services are a key growth sector for the Welsh economy and I am delighted that Conduit is yet again expanding its operations in Wales."