But the Reading-based company said its HVAC and working-at-height operations had had a difficult year.
Interserve said it had made good progress in project and equipment services, PFI and facilities management.
It said its operations in the Middle East are buoyant and its overseas market was continuing to grow.
The firm today announced the appointment of two non-executive directors. Managing director of its facilities management arm Bruce Melizan and Steven Dance who heads up its equipment services division join its board.
Interserve will issue full year results on March 10.