Building on our past. Ready for the future

Worley is a general company of energy, chemicals and resources experts headquartered in Australia. We partner with our customers to deliver projects and create value across the life of their assets. We specialize in consulting, engineering, procurement and construction across the project lifecycle, with services extending through to operations and decommissioning. Leveraging extensive experience and AI-enabled delivery, we support customers in navigating complexity as they meet today's needs and transition to more sustainable solutions.

Principal Responsibilities:

· Development, validation, and stewardship of capital cost (CAPEX) estimates for large, complex mining and industrial projects delivered under EPC and EPCM execution models

· Lead the 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 are developed using 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 across all disciplines.

· 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, as required.

· 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.

Qualifications

What you will bring

· Minimum 15+ years of progressive estimating experience on large mining, minerals processing, or industrial infrastructure 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.

· Support development and continuous improvement of estimating procedures, templates, work instructions, and databases.

· Share estimating knowledge and lessons learned across the organization.

· Strong working knowledge of AACE International Recommended Practices and estimate classification systems.

· Proven experience in EPC and EPCM mining projects in Peru.

- Location: Santiago-Chile

If you need any accessibility adjustments, please make sure to mention it in your application.

Moving forward together

We want our people to be energized and empowered to drive sustainable impact. So, our focus is on a values-inspired culture that unlocks brilliance through belonging, connection and innovation.

We’re building a diverse, inclusive and respectful workplace. Creating a space where everyone feels they belong, can be themselves, and are heard.

And we're not just talking about it; we're doing it. We're reskilling our people, leveraging transferable skills, and supporting the transition of our workforce to become experts in today's low carbon energy infrastructure and technology.

Whatever your ambition, there’s a path for you here. And there’s no barrier to your potential career success. Join us to broaden your horizons, explore diverse opportunities, and be part of delivering sustainable change

Ready to engineer what’s next? Apply today.

📌 Senior Manager, Estimating - Chile (Región Metropolitana)
🏢 Worley
📍 Región Metropolitana