The performing arts centre has signed a three-year managed services deal with Macquarie Hosting for "multiple virtual and dedicated VMware hosts".
Previously, the arts centre hosted its own site.
QPAC said it had outsourced hosting of its website, including qtix, to support growth in the ticketing business and support plans to integrate travel, entertainment and accommodation booking features with its website.
"In the future, the system will seamlessly link concert and theatre tickets with flights, accommodation, merchandise and restaurant bookings for customers," QPAC said.
The contract was awarded after a competitive tender process. The system will be hosted in Macquarie's Intellicentre facility in Sydney.
SSL load-balancing "will ensure QPAC can manage growing peaks in traffic to its ticketing site while tape back-up and redundant firewalls offer added security and redundancy", Macquarie said.
The deal also includes a disaster recovery solution to enable QPAC to "guarantee its ticket sales" and attract and retain more international talent to perform at the centre as a result, the hoster said.