APTECís major clients in Nigeria are:
AfricanoAfricano
Aluminium Smelter Company of NigeriaRUSAL
BG Group - NigeriaBG
Epic DynamicED
Evonik Energy Services GmbHEES
Federal Ministry of PowerPOWER
Geometric PowerGP
Ibom Power CorporationIB
IPAIPA
Niger Delta Power Holding CompanyNDPHC
Nigerian National Petroleum CorporationNNPC
Osprey InternationalOsprey Intl
PB PowerPB Power
Power Holding Company of NigeriaPHCN
Rivers State GovernmentRVSG
SeWASeWA
Shell Petroleum Development CompanySPDC
Zenith CapitalZenith