The Cabinet Office issued orders to ban the London borough of Tower Hamlets deputy mayor Oliur Rahman from his workplace on Tuesday of last week.
A security guard at the Job Centre Plus site in Stratford, east London, was ordered to deny Rahman entry to the office where he works as a benefits adviser.
He had worked in the role for 14 years and is also a member of the PCS union.
The Department for Work and Pensions (DWP) claim his role as deputy mayor and a Tower Hamlets First councillor meant that he was at risk of being accused of political bias.
This is despite the fact that he works in the neighbouring borough of Newham.
Many believe the move is politically motivated. He has received messages of support from local trade unionists.
This is not the first time he has been targeted by DWP bosses.
They wanted to transfer him out of London, but Rahman appealed against the decision last year and won.
However, last week the DWP was granted powers by the Cabinet Office to overrule the appeal decision.
He is now set to be transferred to a non?frontline role at another office in Stratford.