$400K
Approx. annual cost savings
Invoice audits and corrective controls reduced recurring contractor costs by 28%.
ENGINEERING VALUE. DELIVERING IMPACT.
Precision in cost.
Progress in every project.
I’m Reymond Timbuleng.
Cost engineering, project controls & continuous improvement for complex mining operations.
BASED IN INDONESIA / OPEN TO RELOCATION IN AUSTRALIA
ON SITE. IN THE DETAIL.From analysis to action.
01 / PROFILE
EXPERIENCE ACROSSREDPATHRUC CEMENTATION
FREEPORT INDONESIAOn assignment through PT Mpaigelah
01 / SELECTED IMPACT
Accountability.
Measured in results.
Bringing financial discipline and operational insight to large-scale underground mining and construction.
$84M+
Annual operating budgets
Managed direct and indirect mining budgets averaging USD 7 million per month.
$20M
Drainage infrastructure project
Led planning and coordination for two drainage drifts totalling approximately 5.3 km.
All financial figures in USD.
COST CONTROL IN PRACTICE
Finding the detail.
Changing the outcome.
While assigned to Freeport Indonesia, I identified recurring double-billing in equipment rental and service meter charges. Invoice audits and corrective controls brought average monthly costs from $118,800 to $85,500.
28%reduction in monthly costs
for the audited charges
for the audited charges
02 / CAREER JOURNEY
Built on experience.
Driven by improvement.
7+ years connecting cost performance, commercial controls and operational delivery.
APR 2025 — PRESENT01
PT Redpath Indonesia
Continuous Improvement Engineer
Lead a USD 20 million underground drainage infrastructure project, develop schedules, monitor progress and coordinate stakeholders. Analyse mining workflows, investigate equipment delays and support risk assessments and Management of Change.
JAN 2022 — MAR 202502
PT RUC Cementation Indonesia
Cost Engineer
Managed operating budgets averaging USD 7 million per month. Produced forecasts, cash flow projections and variance analyses; maintained WBS and cost codes; and developed a USD 927,673 construction services contract budget.
DEC 2018 — DEC 202103
PT Mpaigelah · Assigned to PT Freeport Indonesia
Cost Control Engineer
Managed and validated approximately USD 10 million in monthly contractor accruals. Reviewed invoices, payment claims and reimbursements against Master Service Agreements, and delivered approximately USD 400,000 in annual contractor cost savings.
03 / EXPERTISE & TOOLS
The analytical depth.
The operational perspective.
Cost engineering
Budgeting, forecasting, cash flow projections, variance analysis, financial reporting and contractor cost management.
Project controls
Work Breakdown Structures, scheduling, progress monitoring, earned value analysis and contract administration.
Continuous improvement
Root cause analysis, workflow optimisation, operational KPIs, resource planning and stakeholder coordination.
TECHNICAL TOOLKIT
SAP ECCGlobal CASInEightAdvanced ExcelPower BIMicrosoft ProjectDeswik.MDMAutoCADPitram
EDUCATION
Bachelor of Industrial Engineering
Institut Teknologi Harapan Bangsa
Bandung, Indonesia · 2018
SELECTED CERTIFICATIONS & DEVELOPMENT
- First-Level Operations Supervisor (POP), BNSP 2025
- Lean Six Sigma Yellow Belt 2026
- Lean Management 2025
- Project Monitoring & Scheduling 2025
- Counterpart Development Program
04 / NEXT OPPORTUNITY
Let’s build
better outcomes.
For opportunities in cost engineering, project controls,
contract administration and continuous improvement.
BASED IN
Tembagapura, Indonesia
Available for FIFO / DIDO rosters.
Open to relocation across Australia.