Datacom has secured a three-year services contract with Norfolk Group Holdings worth $10 million.
The contract will require the integrator to migrate the customer to a centralised IT platform based on Citrix MetaFrame.
This will allow Norfolk's national workforce to access common file and data regardless of location or network connection.
Norfolk Group IT manager, David Gregson, said it had conducted an extensive selection process with 20 companies for the deal.
He refused to disclose the names of the tier-one multinationals involved.
"We needed someone that was flexible and fast enough to develop with us," he said.
Datacom CEO, Michael Browne, said the addition of Norfolk would benefit the company by enhancing its experience in specific industries.
"It is a new opportunity for us," he said.
"The scale of deployment, and the speed at which it happens, builds on a lot of our past experiences."
Datacom will also be responsible for hosting and management of the infrastructure from its Sydney data centre. This is expected to reduce support costs for Norfolk and improve data retention and security.
Additional services include desktop support, LAN/WAN services, service and helpdesk provision, IT procurement and asset management, application development and disaster recovery planning.
The deal also has an optional two-year extension.
Datacom is expected to begin implementing its services in October.