C/O: Instection & Tests Nigeria Limited
KM 1 Eleme-Onne Road, Opp. Bristow Quarters,
Port Harcourt, Rivers State – Nigeria.
Tel: +234-8030875-2576
C/O: Petroeum Training Institute (PTI),
No. 1 PTI Road, Effurun – Delta State.
Tel: +234-806-791-8883
C/O: Greenfield Consultancy & Allied Services Limited,
3rd Floor, Coscharis Building,
Plot 388, Constitution Avenue,
Central Business District, Abuja – FTC.
Tel: +234-803-659-1612
20 Awudu Epkekha Boulevard Street,
Off Admiralty way, Lekki, Lagos – Nigeria.
Tel: +2348134785676, +234(0)8176138873
Email: info@ogtan.org.ng
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