ONNA E&C

ONNA is an electrical and mechanical design-build contractor and engineer working across three continents. We design, procure, install, test and commission complete systems, taking on full design and build packages, defined scopes within larger programmes, or any single stage of that chain on its own. Much of our work is carried out in occupied and operational buildings, where power, cooling and life safety systems have to keep running while the works proceed, and we deliver with our own engineering and site supervision teams.