$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
- Certified Lean Specialist 2025
- Project Schedule: Monitor & Control Specialist 2025
View All CertificationsHide Certifications9 credentials
01 / BNSP · LSP Energi Mandiri
First-Level Operations Supervisor (POP)
2025
Certificate preview
02 / Lean Six Sigma Institute
Lean Six Sigma Yellow Belt Course
21 February 2026
Certificate preview
03 / Lean Six Sigma Institute
Lean Management Certification
24 November 2025
Certificate preview
04 / AIGPE
Certified Lean Specialist
8 October 2025
Certificate preview
05 / AIGPE
Certified Process Mapping Specialist
2 November 2025
Certificate preview
06 / AIGPE
Certified Project Schedule: Monitor and Control Specialist
2 October 2025
Certificate preview
07 / AIGPE
Certified Project Charter Specialist
1 October 2025
Certificate preview
08 / MTF Institute
Business & Operations Management Excellence
26 May 2026
Certificate preview
09 / PT Freeport Indonesia
Management of Change — SFT437
23 September 2024
Certificate previewPROFESSIONAL DEVELOPMENT / MARCH 2026
Counterpart Development Programme
Development pathway towards
Superintendent, Operational Controls
Formally assigned as a national counterpart in Redpath’s development programme, with management approval recorded in March 2026. The programme is designed to build the skills and competencies required for future Superintendent, Operational Controls responsibilities.
Development is guided by an individual training plan, defined targets and assessments, supported by management-provided training, resources and learning opportunities.
Structured development towards future operational controls responsibilities.04 / IN THE FIELD
Close to the work.
Connected to the team.
From checking installation records to reviewing construction readiness and schedule performance, field engagement brings operational context to project controls.
Verifying cable installation against the plan
Inspecting installed cable lengths and grouting records underground, checking drilled metres (m-drill) and grouted metres (m-grout) against the recommended worksheet. The inspection connects field measurements with the specified installation requirements.
Inspecting the heading for chute gallery construction
Inspecting the newly concreted heading in preparation for chute gallery construction, with the ore pass above secured by a bulkhead. The visit provides a direct view of site conditions ahead of the next construction stage.
Understanding the operation from within
Time in the underground environment brings practical context to planning, cost analysis and operational decision-making.
Connecting people, assets and priorities
Working alongside colleagues at site connects the detail of day-to-day operations with the wider view needed for effective project controls.
Bringing field context to performance analysis
Close exposure to underground equipment and working conditions informs a practical approach to understanding delays, resource needs and improvement opportunities.
Aligning the team on progress and site priorities
With colleagues after a progress-monitoring meeting to review field progress against the schedule, discuss whether activities were ahead or behind plan, and examine issues encountered on site. These discussions connect reporting with the realities of project delivery.
05 / 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.