Rofi Ansyah

Ex Process Engineer Intern PT Pertamina EP Cepu

Process Engineering Intern at PT. Pertamina EP Cepu (2025-12 – 2025-12)

• Evaluated condensate stabilizer column performance using Aspen Plus & Ms. Excel to analyze process efficiency and product quality.
• Performed condensate stabilization simulation and reboiler evaluation using Aspen HYSYS and Aspen Exchanger Design & Rating.
• Conducted process evaluation of the condensate stabilizer system using Aspen HYSYS and Aspen Exchanger Design & Rating to improve separation performance.

Production Engineering Intern at PT. Kilang Pertamina Internasional Refinery Unit IV (2024-04 – 2024-05)

• Completed a student internship at PT Kilang Pertamina Internasional RU IV Cilacap, focusing on the transition of processes in the Lube Base Oil (LBO) unit.
• Conducted a study titled 'Technology Transition from Solvent Separation-Based LBO to Catalytic Dewaxing-Based LBO Plant at Pertamina RU IV Cilacap'.
• Gained hands-on experience in refinery operations, process optimisation and technological evaluation to enhance LBO production efficiency.

Utility Intern at CPP Gundih PT. PERTAMINA Asset 4 Field (2023-02 – 2023-03)

• Conducted fieldwork titled 'Observation and Evaluation of Hydrocyclone and Stripper Column in Produced Water Treatment' to analyse the performance of the equipment in real operational conditions.
• Gained practical experience in evaluating water treatment processes, with a focus on separation efficiency and operational parameters.
• Developed technical insights for optimising and improving produced water treatment systems efficiency.

Laboratory Assistant at PEM AKAMIGAS CEPU (2023-01 – 2024-04)

• Assisted laboratory activities in petroleum testing, heat transfer and thermodynamics practicum.
• Guided ASTM-based petroleum product testing including density, Reid vapour pressure and Saybolt colour analysis.
• Supported heat exchanger and boiler experiments, data collection and laboratory equipment maintenance.
• Helped students understand practical applications of thermodynamics and oil & gas process operations.

Bachelor of Applied Science in Oil and Gas Process Engineering – Polytechnic of Energy and Mineral Akamigas Cepu (2021-06)