Interserve expects its 2017 performance to be in line with forecasts outlined in October.
It said the 'Fit for Growth' programme was expected to deliver a £40m-£50m benefit by 2020.
It also said that it expected 2018 operating profit to be ahead of current market forecasts and that constructive discussions with lenders over longer-term funding were progressing.
Chief executive Debbie White said: 'The new management team, and the Board, have been working to stabilise the business and provide a sound foundation to continue to serve our customers effectively, underpin our future growth and to restore shareholder value.
'This work has focused on managing the balance sheet, conducting a thorough assessment of the contract portfolio, and introducing new management disciplines, processes and cost controls under the 'Fit for Growth' programme.'