Senior Estimator

ABOUT THIESS Founded in Australia in 1933, Thiess has grown into a global leader in sustainable mining services and resource solutions, with more than 15,000 employees and operations spanning multiple continents. Today, we deliver mining services, land reclamation, and engineering expertise that help shape the future of the resources industry, creating lasting value for our clients, communities, and people. At Thiess, you’re not just joining a company; you’re joining a team helping redefine what sustainable mining looks like for future generations. North America is a key part of our global growth journey, with operations across the United States and Canada and continued expansion into new regions. From Salt Lake City and the Intermountain West to Sudbury and Northern Ontario, our people are solving complex challenges, embracing innovation, and building careers with real impact. We’re looking for people who want to do meaningful work, grow alongside a global organization, and help drive the future of mining and resource solutions. Learn more about our purpose, values, and the opportunities ahead by watching the following videos about Our Purpose and Our Values ! ROLE OVERVIEW: As a Senior Estimator, you will support Thiess throughout North America. This position is responsible for developing, managing, and coordinating capital cost estimates for mining and reclamation projects. In this role, you will partner closely with mining and construction teams while managing special projects and collaborating across departments to ensure successful project execution. This role is intended for an experienced senior estimator with experience leading large capital cost estimates for mining studies, major project development programs, and execution-stage mining projects. The successful candidate will have demonstrated experience coordinating multi-discipline estimates for mining, waste storage, reclamation, closure, and site development scopes. Experience leading estimates for PEA, PFS, FS, execution, sustaining capital, and large projects is strongly preferred. Contractor-side, construction, field, or preconstruction experience is considered a significant asset. KEY RESPONSIBILITIES Deliver estimating for complex projects ranging from $1M to $10B+ across open pit mines, infrastructure, utilities, and multi-phase study programs Support large-scale mining studies (PEA, PFS, FS), execution-stage planning, sustaining capital programs, and portfolio-level estimates Coordinate and compile input parameters to develop timely multi-discipline cost estimates and implementation schedules Work closely with engineering, operations, and stakeholder teams to detail scope and validate material takeoffs, drawings, and client-provided data Identify, assess, and quantify project risks and opportunities, including potential schedule impacts through design reviews and formal risk analyses Develop estimate execution plans and partner with HR to outline labor-force work strategies and site-specific wages that support assumptions, and staffing needs Support BDM interface with client counterparts and serve as the primary estimating point of contact ensuring clear communication, scope alignment, and estimate defensibility Drive innovative solutions and apply industry trends and best practices to maintain efficiency and competitiveness Prepare basis of cost estimate report deliverables for the end user Support special projects and perform other related duties as needed WHAT YOU'LL BRING Education Bachelor’s degree or equivalent in Engineering, Construction Management, or related field. Mining Engineering is preferred Experience Minimum 7 years of estimating experience with technical expertise across mining and heavy civil earth works Proficient in developing cost estimates for mining or heavy civil related projects including open pit, material handling, crushing and conveying, and site infrastructure facilities Demonstrated ability to lead large studies and program-…