ALTEN nel mondo
 France ALTEN S.A ALTEN SI & RÉSEAUX ALTEN Sud-Ouest ANOTECH ENERGY, AVENIR CONSEIL, B2I, CISIA, DIXID, MI-GSO, PEGASE, WINWISE
Germany ALTEN GMBH AEROTEC ENGINEERING GMBH MI-GSO GMBH
Belgium ALTEN BENELUX AXEN
Spain ALTEN
Netherlands ALTEN PTS DDA ENGINEERING ORION ENGINEERING
Italy ALTEN ITALIA |
 United Kingdom ALTEN LTD SD PARTNERS ANOTECH ENERGY
IndiaALTEN
Romania AEROTEC SRL ALTEN SI TECHNO ROMANIA
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