Senior Cost Engineer · Project Controls

Rahmat Ilham Zazzali

Senior Cost Engineer · Project Controls · Quantity Surveying

Based in Batam, Indonesia, I am a PMP® and CCP® certified professional with 14+ years of experience across oil & gas, EPC, refinery, fabrication, marine, and major capital projects in Indonesia, Australia, Singapore, and Libya.

My experience covers both the owner side, with upstream portfolios at Waha Oil Company, and the contractor side, on refinery and EPC work within the Pertamina Group. I am seeking Senior Cost Engineer and Project Controls roles with oil & gas operators and EPC contractors in Qatar and the wider GCC.

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14+Years of experience
$1.5B+Portfolio exposure
4Countries of experience
PMP · CCPProfessional credentials
Core expertise

Cost engineering & quantity surveying expertise.

I connect engineering progress, contractual commitments, actual costs, accruals, and future exposure into clear management decisions. My work spans the full cost cycle—from estimate and baseline through forecasting, change control, invoicing, and closeout.

01

Cost Control & Forecasting

Budget control, commitments, actuals, accruals, ETC/EAC, cash flow, variance analysis, trend management, and TCC reporting.

02

Quantity Surveying

Quantity verification, progress measurement, VOWD, unit rates, invoice certification, final accounts, and subcontract administration.

03

Project Controls

WBS/CBS alignment, EVM, CPI/SPI, integrated cost and schedule analysis, dashboards, governance, and management reporting.

04

Change & Claims

Variation orders, entitlement review, cost impact assessment, trend registers, contractor claims, and commercial negotiation support.

05

Estimating

Class 5–1 estimating, benchmarking, cost build-ups, risk allowances, Monte Carlo analysis, and estimate assurance.

06

ERP & Analytics

SAP, Oracle ERP, Primavera P6, CostOS, advanced Excel, Power BI, @Risk, MS Project, RSMeans, and ACCE.

Approach

How I control cost.

One connected cycle from the first estimate to final account, so management sees cost exposure early and decisions are based on current numbers.

  1. Estimate

    Class 5–1 estimates, benchmarking, cost build-ups, and risk allowances.

  2. Baseline

    Budget set against an aligned WBS/CBS as the reference for control.

  3. Measure

    Commitments, actuals, accruals, progress measurement, and VOWD.

  4. Control change

    Variation orders, cost impact assessment, and trend registers.

  5. Forecast

    ETC/EAC, cash flow, variance analysis, CPI/SPI, and management reporting.

  6. Close out

    Invoice certification, final accounts, and subcontract closeout.

Experience

Professional experience in oil & gas and EPC.

Hands-on delivery experience across upstream facilities, refinery upgrades, ammonia plant modules, fabrication yards, offshore vessels, and brownfield execution.

Aug 2026 — Present

Senior Quantity Surveyor / Project Controls

PT Wasco Engineering · Indonesia

Controls budget, TCC, SAP actuals, VOWD, forecast, invoicing, and variation orders for a major ammonia plant module project, coordinating engineering, procurement, construction, finance, and client stakeholders.

Jun 2022 — Apr 2026

Senior Cost Control & Project Controls Engineer

Waha Oil Company · Libya

Supported major upstream portfolios through budget development, AFE control, forecasting, VOWD, contractor cost review, invoice management, change control, and executive reporting.

Jul 2016 — May 2022

Senior Cost Engineer / Cost Control Lead

PT Patra Badak Arun Solusi · Pertamina Group

Led cost engineering and reporting for refinery revamp, upgrade, turnaround, and EPC assignments, integrating estimates, schedules, progress, cash flow, and contract performance across refinery projects totalling more than USD 770 million.

Oct 2012 — Jun 2016

Senior Cost Engineer · Junior Cost Engineer

OTTO Marine Pte Ltd · Singapore (2014–2016) · PT Batamec Shipyard · Indonesia (2012–2014)

Developed a strong field foundation across FPSO fabrication, AHTS newbuilding, ship repair, mechanical works, piping, construction progress, and contractor measurement.

Selected projects

Selected cost engineering projects.

Experience ranges from cost governance for billion-dollar portfolios to detailed measurement, invoicing, and change management at work-package level.

Owner-side
USD 1.49B

Crude Oil Evacuation & Facility Rehabilitation

Owner-side cost control, forecasting, VOWD, budget governance, contractor review, and project reporting.

EPC phase · Upstream
USD 282M

Concession 32 Fields Redevelopment

EPC-phase cost and project controls for upstream field development.

Ammonia plant modules
USD 150M

Ammonia Plant Module Project

TCC, SAP cost tracking, QS, invoicing, progress measurement, and variation management.

Featured case study · Pertamina

Storage Tank Overhaul — Tender Estimation & Project Cost Control

Refinery Units II–VI & Marketing Operations · Indonesia

Handled tender cost estimation and project cost control for storage tank overhaul works across Pertamina’s Refinery Units II, III, IV, V and VI and Marketing operations. My responsibilities extended from tender preparation through project execution to completion.

Tender stage

Multidisciplinary scope

Tank bottom, shell, roof, piping, and civil foundation works. Prepared tender cost estimates covering the defined overhaul scope across mechanical, piping, and civil disciplines.

Execution stage

Control through completion

Monitored project budgets, actual costs, work progress, and forecasts throughout execution, assessing the remaining cost required to complete the work.

This experience brings together tender-stage estimating and execution-stage cost control across multiple operating locations, with responsibility continuing through project completion.

Tender EstimationStorage Tank OverhaulBudget ControlCost ForecastingProgress Monitoring
Featured case study · Cost estimate

36-inch Produced Water Pipeline — AACE Class 3 EPIC Cost Estimate

Oil & gas operator (name withheld) · Remote desert oilfield, MENA region

Prepared a Class 3 cost estimate for the lump-sum turnkey EPIC of a 36-inch PE100 SDR11 produced water pipeline, about 1.8 km long, from an oilfield gathering system to a water treatment plant. The estimate was built at FEED maturity for budget and bid preparation, with a full basis of estimate, quantity take-off, procurement and construction build-ups, and mark-ups benchmarked against a published international cost database.

USD 3.4MTotal estimated cost (P50)
−20% / +30%Class 3 range, USD 2.7M–4.5M
≈ USD 1,950Cost per metre installed
4.5 monthsConstruction duration basis

Cost breakdown (% of total estimated cost)

  • Procurement, delivered to site47.6%
  • Construction indirects16.6%
  • Construction direct14.2%
  • Contingency (Class 3)10.7%
  • EPIC PM, insurance, commissioning & bond6.9%
  • Escalation2.2%
  • Engineering & survey1.8%
Quantities

Take-off from design geometry

Trench sections from cover depth, bedding and side slopes gave about 18,200 m³ of excavation, plus bedding, backfill, 151 pipe joints, 157 butt-fusion joints and the hydrotest water volume.

Procurement

Delivered-to-site material cost

Pipe priced by weight from ex-works USD/kg, then freight, port handling and customs, inland trucking, third-party inspection and spares added to reach a delivered cost. Procurement is about 48% of the total.

Construction

Unit-rate build-up

Man-hours per unit at a composite labour rate plus equipment and materials across earthworks, pipeline installation, crossings and civil, live tie-ins and testing. Time-related indirects (supervision, camp, HSE, permits) were priced on the construction duration.

Risk & assurance

Mark-ups, contingency and open risks

PM, insurance, commissioning and bond rates checked against benchmark ranges. Escalation of 2.5% and a deterministic 12% contingency, with key technical risks such as material suitability at design temperature flagged outside contingency. An ACCE input list was prepared for an independent check.

AACE 18R-97 Class 3Basis of EstimateQuantity Take-OffUnit-rate build-upBenchmarkingEscalation & ContingencyACCE

Client, project and document identifiers are withheld and figures are rounded.

Selected achievements

Results and leadership.

Highlights from estimating, commercial performance, and team development.

120Project proposals and estimates completed in 2022, against a target of 80.
8%–15%Consistent net margins delivered during 2016–2022.
5Cost-control staff supervised and mentored on estimating, forecasting, reporting, and project governance.
PMI · AACETrained Project Managers and junior engineers on PMI and AACE practices and supported standardization of estimating procedures.
Systems & credentials

Project controls tools & certifications.

Proficient in the systems and controls needed to convert project data into reliable forecasts, risk visibility, and commercial action.

SAP PSOracle ERPPrimavera P6CostOSAdvanced ExcelPower BI@Risk / Monte CarloMS ProjectEVMVOWDETC / EACWBS / CBS
Project Management Professional (PMP®)Project Management Institute · 2022 · Credential No. 3256455
Certified Cost Professional (CCP®)AACE International · 2023 · Credential No. 05313
B.Sc. Mechanical Engineering (ST)Institut Teknologi Nasional Malang (ITN) · 2012
Welding Inspector · 2014Member, PMI and AACE International

Open to roles in Qatar and the GCC.

Available for senior cost engineering, QS, estimating, and project controls opportunities with oil & gas operators and EPC contractors.

ilhamzazzali@gmail.comWhatsAppLinkedInDownload CV

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