Get In Touch PT. Sahabat Garuda Niagatama (SGN) – General Contractor & Supplier. PT. Sahabat Garuda Niagatama (SGN) General Contractor & Supplier | Fiber Roof & UPVC, Mechanical & Electrical, Packaging, Security System, Konstruksi. Address Ruko Simphony Blok HX 1 No.10, Harapan Indah – Bekasi 0812-3456-3632 admin@pt-sgn.co.id