• Analyzed exploration, pre-mining, mining and production samples using the Press Powder Method and the EDXRF (Energy Dispersive X-Ray Fluorescence) Epsilon 4 instrument• Ensured good XRF performance based on the analysis results of Certified Reference Material (CRM).• Created an instrument calibration and method validation program every 6 months• Conducted quality control on sample analysis results and monitoring the Crtificate of Analysis (CoA) results from Independent Surveyors• Successfully reported 80% of analysis results from total incoming samples

• Certified as a Laboratory Analyst (Mineral & Coal) by Badan Nasional Sertifikasi Profesi (BNSP)• Got a certificate of ISO/IEC 17025:2017• Mineral: Gravimetry Method (Loss of Ignition), Fusion Bead and Press Pellet. Analysis instruments using WDXRF (Wavalength Dispersive X-Ray Fluorescence) Zetium and EDXRF S2 PUMA• Coal: Proximate Method (Moisture, Ash Content, Volatile Matter & Fixed Carbon), Total Sulfur, Calorific Value and Total Moisture. Using Bomb Calorimeter and Sulfur Analyzer instruments• Made analysis results in the form of raw materials for daily reporting• Implemented, maintained and improved laboratory management systems in accordance with ISO/IEC 17025:2017.

• Research on pretreatment of empty oil palm bunches using Ionic liquid as a catalyst for the preparation of Bioethanol production• Used the Pretreatment (Silicon Oil), Evaporation, Chemical Hydrolysis and Gravimetry methods. Tested sample results by UV-Vis Spectrophotometer and High Permormance Liquis Chomatograpy• Presentation of research results and Made drafts of research results for scientific publications.