Around 100 jobs will be lost to Falkirk when ScottishPower pulls out of the town.
The energy firm has announced it will close the customer service centre in Camelon when a planned new headquarters opens in Glasgow in 2015.
A spokesman for the company said there would be an option for staff to move to either the city or other offices in Hamilton.
But there are concerns that not everyone will want to relocate and many will end up on the dole.
Falkirk Council officials have revealed that they have been in talks with the energy giant over the future of the Glasgow Road site and the local employees for the last 18 months.
With ScottishPower announcing the project to build a new 14-storey headquarters to house 15000 staff will go ahead, the local authority has vowed to step up its efforts to safeguard the staff affected and find a suitable use for the land.
Councillor Dennis Goldie, convener of the economic strategy and development committee, said: “It is a very real concern that 100 jobs are going. Although staff will be given the opportunity to transfer, there are those for whom this will not be suitable.
“I believe it is also very important that we get a productive use for the site and this is something that we cannot afford to delay over.
“We will be having further talks with ScottishPower following this announcement.”
The new 220,000 sq.ft complex, located at the corner of St Vincent Street and India Street, in Glasgow will be on the site of the former Strathclyde Regional Council offices, which was abolished following local government re-organisation in 1996.
ScottishPower has announced that Helical Bar, with Scots-based partner Dawn Developments, was the preferred developer for the new building.
The £80 million project sees Helical Bar taking over the Camelon site for “redevelopment purposes”, along with other locations in Yoker and Cathcart, Glasgow, which will also become surplus to requirements.
Ignacio Galan, ScottishPower chairman, said: “The energy sector in Scotland and across the UK is one that can help to boost the economy and offer highly skilled employment for thousands of people. Our plans in the UK in the coming years require an office complex that is fit for purpose to deliver and manage these investments.
“Following the integration between Iberdrola and ScottishPower in 2007, we have invested £4 billion in the UK and made a commitment that Glasgow would remain as the central location for our company in the UK. This new development will ensure Glasgow remains home to ScottishPower’s UK headquarters for the long term.”
Keith Anderson, chief corporate officer at ScottishPower, said: “We currently have an ageing office portfolio that is no longer suitable to match the growth in our business, particularly in renewable energy, engineering, traditional generation and expanded customer offering.”