Up to 80 roads jobs are at risk at Kier.
The Bedfordshire-based contractor said it was reviewing the roles at its four London Highways Alliance (LHA) depots.
Kier provides roads maintenance and improvement works for Transport for London and local authorities in the capital under the LHA South contract.
The eight-year deal began in 2013. Kier bought highways specialist Mouchel in 2015.
A Kier spokesperson said this week: “Following the acquisition of Mouchel by Kier we are rationalising, integrating and removing duplication across two sets of highways businesses, which are operating in the same region.
“As part of this process, roles are under review. In addition to four LHA contract depots, we also operate a London street lighting depot, bringing the total to five, and are looking to integrate two of these depots into one at Esher.
“Across the four LHA contract locations we are reviewing a total of circa 80 roles from a workforce of 248.
“We have a range of alternate opportunities across the group, and are looking at opportunities for redeployment, in addition to prioritising voluntary redundancy over compulsory redundancy throughout.”