GLOBAL IT company Digital Realty opened it first Australian outlet in Erskine Park on Thursday.
"This brings about 250 jobs to western Sydney," Digital Realty's Asia Pacific regional head Kris Kumar said.
"We have 20 staff working full-time and our customers will be bringing the extra jobs."
The new facility, Digital Erskine Park, comprises 8020 square metres in Templar Road.
Mr Kumar said the company chose Erskine Park because its business park and transport links provided good access to customers.
He also said the national broadband network's rollout in Penrith provided better IT connections.
Digital Realty's head office is in San Francisco in the United States. It has branches all over the world and is growing.
Premier Barry O'Farrell said the move was "a clear vote of confidence in the economy of western Sydney".
"An estimated 250 jobs created by this investment is great news for people in Sydney's west who want to work closer to where they live," Mr O'Farrell said.