Worley is seeking an Estimating Manager to lead the preparation, validation, and stewardship of capital cost (CAPEX) estimates for large, complex mining and industrial projects. You will act as a lead estimator for proposals, studies, and execution phases, ensuring estimating excellence across our portfolio.
What You'll Do
- Develop, validate, and steward capital cost (CAPEX) estimates for large, complex mining and industrial projects.
- Lead preparation of order-of-magnitude, conceptual, pre-feasibility, feasibility, and definitive CAPEX estimates in line with AACE Class 5 through Class 1 standards.
- Ensure estimates use appropriate methodologies, benchmarks, factored and detailed approaches consistent with project phase and data maturity.
- Develop and document estimate bases, assumptions, exclusions, qualifications, and methodologies.
- Validate estimate completeness, accuracy, and alignment with scope definition, execution strategy, contracting approach, and schedule.
- Support and participate in estimate reviews, peer reviews, audits, and stage-gate approvals.
- Align estimating outputs with risk assessments, escalation models, indirects, and allowances.
- Interface closely with Project Controls, Engineering, Procurement, Construction, and Commercial teams to ensure cost alignment.
- Support development of cash flow forecasts, manning curves, and cost phasing aligned with project schedules.
- Provide expert input to change management, trend analysis, and cost forecasting.
- Support development of cost risk assessments, including identification of cost drivers, uncertainties, and opportunities.
- Assist in defining appropriate contingency levels using deterministic and probabilistic methods.
- Collaborate with risk management teams to ensure cost and schedule risks are coherently reflected in estimates.
- Act as a lead estimator for proposals, studies, and execution phases for mid- to large-scale projects.
- Support vendor and supplier cost evaluations, benchmarking, and negotiation strategies.
- Communicate estimate outcomes clearly to clients and senior leadership, including confidence levels and key sensitivities.
- Support development and continuous improvement of estimating procedures, templates, work instructions, and databases.
- Share estimating knowledge and lessons learned across the organization.
What We're Looking For
- Minimum 15+ years of progressive estimating experience on large mining, minerals processing, or industrial infrastructure projects.
- Experience in Mining Infrastructure and Water Projects.
- Experience in EPC and EPCM projects.
- Degree or diploma in Engineering, Construction Management, Quantity Surveying, Business, or a related discipline.
- Demonstrated experience preparing CAPEX estimates across multiple project phases (studies through execution).
- Strong working knowledge of AACE International Recommended Practices and estimate classification systems.
- Proven experience in EPC and EPCM mining projects in Peru.
- Project Management Skills.
- Intermediate English Level.
Technical Stack
- EcoSys
- PRISM
- Oracle
- P6
- Hexagon
- Excel-based models
Team & Environment
You will interface closely with Project Controls, Engineering, Procurement, Construction, and Commercial teams.
We provide equal employment opportunities to all qualified applicants and employees without regard to age, race, creed, color, religion, sex, national origin, ancestry, disability status, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, citizenship status or any other basis as protected by law.
