Up to 700 new jobs will be created at a new cyber security headquarters being set up in Melbourne for the National Broadband Network (NBN), the Victorian Government says.

Information technology specialists will work at the 24-hour centre at the Docklands to protect the NBN from cyber attack.

The move is expected to create about 400 tech jobs in the next two years, and another 300 in construction and maintenance.

Victoria's Small Business Minister Philip Dalidakis would not say how much it had cost the Andrews Government to woo the NBN, but insisted it was money well spent.

"We make no apologies for being aggressive in the marketplace to land those jobs and those companies that are going to hold in good stead Melbourne and Victoria's position as the number one IT destination," he said.

"The number one tech, the number one digital destination, the number one destination for start-ups."

In a separate announcement in August, the Federal Government said 4,500 new workers would be recruited and trained to ensure the NBN was completed by 2020.

"We've got 1,300 jobs in New South Wales, 900 in Western Australia, 900 in Queensland, 800 in Victoria, 400 in South Australia, 200 in Tasmania," the then communications minister Malcolm Turnbull said.

Federal Communications Minister Mitch Fifield said there were currently 2,300 Victorians working for the NBN.

"The NBN does have a choice, it does have options, and as a senator for Victoria I'm very pleased that we'll see new jobs here," he said.

NBN's chief information officer John McInerney said the centre would be the NBN's "first line of defence".

"It'll be looking at traffic across the network, it'll be acting as a first point of interrogation of that traffic as it goes through," he said.

"But really it's a national broadband asset, a critical asset for Australia, this centre will be making sure that we understand what's actually traversing the network at all times."