MARULI TUA SIANTURI

Lead and manage the operations team to ensure operational excellence, including: - Mine Technical Services - Civil and mining operations - Crusher and leach pad operations (LPO) - Barging Develop pit optimization and operational strategies, and prepare FS, RKAB, and support AMDAL revision and other regulatory requirements to ensure compliance and long term project sustainability.

Lead and manage mining supervisors and mine plan team to develop and execute plans, improve operational efficiency and minimize environmental impact, ensuring plans align with targets and implementing best practices. Conduct pit optimization to support strategic decision making and prepares mine designs, three month plans, forecasts, and life of mine (LOM). Drives productivity and cost-efficiency to enhance profitability. Mentors mining supervisors and junior engineers, manages operational risks, and facilitates cross departmental communication for seamless plan execution.

Managed an agribusiness employing 15 to 20 daily wage workers

Led and mentored a multidisciplinary team of 15 engineers (planning, drill & blast, survey, geotech, database), ensuring the delivery of high quality outputs and full compliance with operational and safety standards. Managed the team in developing and executing daily to weekly mine plans, reviewing outputs to drive optimal planning and ensuring alignment with targets and best mining practices. Delivered strategic plans, including three-month rolling plans, forecasts, budgets, and life of mine (LOM) updates, to cross functional departments and senior management, including the General Manager. Produced and presented key technical and regulatory documents, including feasibility studies, reclamation plans (RR), Reclamation Guarantee (JAMREK), RKAB, and mine closure plans to senior management and regulatory bodies.

Led mine planning and earthwork construction, coordinated cross functional teams, and played a key role in achieving the first gold pouring milestone. Developed and implemented strategic mining plans, including pit and out pit layouts, production schedules, and heap leach pad strategies. Designed and supervised earthworks and infrastructure construction, such as settling ponds, stockpiles, and haulage roads, ensuring alignment with design specifications and operational targets. Established mine planning systems, production performance reports, and databases to support project success.

Led mining supervisors in executing mine plans, optimizing equipment utilization, providing pit optimization, pit design, and schedules, monitoring stripping ratios, and achieving coal production targets.

Created and presented mine plans, including pit, dump, dewatering, and reclamation, to meet production targets. Provided tactical planning and operational guidance, collaborating with teams to ensure ore delivery targets were met. Coordinated drilling and blasting plans, led production meetings, and improved the dewatering system, reducing costs and environmental impact.

Managed and optimized mining contractor operations, control stripping ratio and ensured compliance with plans, conducted pit optimization, created pit designs and schedules. Prepared and presented monthly and quarterly mine plans for large scale open pit coal projects, improving planning efficiency and resource utilization.

Assisted the project manager in managing mining operations, optimizing fleet production, allocating resources efficiently, enhancing productivity, and preparing daily production reports.