O'Donnell Griffin - Welcome odg haden, odg, haden, o'donnell griffin, electrical contractors, data contractors, electrical engineering, engineering, electrical engineers, railway signalling, signalling, power, resources, high voltage, switchboards, process control, instrumentation, water, infrastructure, telecommunications, energy, rail, cabling, mining, commercial, data networks, hv, communications, overhead wiring, power generation, power transmission, power distribution,, ODG HADEN Construction is a leading electrical and communications engineering solutions provider. We help our customers design, build and maintain 'mission critical' infrastructure, such as Railway signalling and overhead wiring systems Power generation, transmission & distribution systems; High voltage cabling, switchboards and process control instrumentation; Data & telecommunications networks.