The acquisition will allow NG Bailey to extend its range of services in the electricity distribution network sector.
The move will add an extra £10m of annual turnover and will see more than 70 highly skilled employees join the NG Bailey Group from Schneider Electric.
The team will become part of NG Bailey’s Services division and operate under the Freedom brand that was acquired in March 2018.
The SES division has provided engineering capital replacement and ‘hard FM’ maintenance services, particularly within utilities, for more than 10 years.
It works primarily with electricity distribution network operators and private network owners across substations and networks.
David Hurcomb, NG Bailey’s Chief Executive, said: “Bringing the SES division into the NG Bailey fold provides a natural extension to the range of services we already offer – particularly engineering and maintenance.”