BT is moving out of 15-storey Telephone House overlooking Charter Square in Sheffield city centre after almost 40 years.
Around 400 workers and agency staff are based in the tower block where BT’s lease is ending in 2013. The company says workers will be found jobs elsewhere locally.
“We are committed to finding the best options now for all our people working in the building, to ensure they remain employed by us,” said a spokesman, adding that alternative jobs will be available in business sales in Sheffield and consumer sales in Doncaster.
Staff also have the option of taking up roles with BT’s sister company Plusnet in Sheffield, or working from home.
But Kirsty Lenham, Sheffield and district branch secretary for the Communication Workers’ Union, said: “It’s a real blow to workers in Sheffield, some of whom have over 40 years service with BT, and some are understandably upset.”
She added: “We’re helping our members with this process and are hoping to keep as many jobs a possible in Sheffield.”
The building is being marketed.