A. Didik Subiyanto Director PT. Lotus SG Sentosa ...
Pion Quarry Nusantara. November 2010 – 2012 2 years. Site office Bogor, Head Office Jakarta. Experiences in Blast design, Pit Operation, Crushing Opertaion, cost control and safety. Mine Technical Manager (setifikat Pengawas Operasional Utama) First Class Blaster Course.