Balfour Beatty is considering closing one office in the Midlands and moving several jobs from another.
Balfour Beatty Rail UK is in talks with employees about the closure of its Birmingham office as well as relocating some jobs from a Derby base.
The troubled contractor last month told the City its 2014 figures would be affected by a £75M write-down of contract values across its construction services division.
But it said the proposed changes in the Midlands were to enable it to work more closely with its customers.
Over half the affected employees will be offered the chance to relocate to other Balfour Beatty Rail UK offices, and the contractor said it hoped others could be redeployed within the wider group.
“In Birmingham, 31 employees are under consultation about the proposed move. Sixteen of these roles are scheduled to be relocated to other Balfour Beatty Rail UK offices. The remaining 15 are currently under consultation,” said a spokeswoman.
“In Derby, there are some changes to our support functions based there. Thirteen of these roles are scheduled to be relocated and eight others are currently under consultation.”