Global Switch designs and operates secure infrastructures for hosting computer data. It is one of the world leaders in this market with 250 000 m2 of datacenters throughout the world. The company established itself in Clichy in 2001, constructing the largest French datacenter of its time. To respond to growing client demand, Global Switch decided to extend the capacity of the site. Within the framework of this project, Cap Ingelec was selected to carry out the prime contractor mission for all trades relating to the second phase of the datacenter. The new infrastructure will require a power supply of 30 MW. Cap Ingelec brings its methods and expertise to this large-scale project to guarantee its smooth running, respecting the timescale of 24 months and also the initial budget.