Senior Mining Estimator Thiess Mining Services Contractor

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 analysis 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-level estimates, including coordinating multiple technical disciplines, managing estimate inputs, reviewing estimate maturity, and presenting estimate results to project teams and clients Advanced understanding of various contract structures and their impact on estimating, utilizing high-level professional judgment, creativity, and innovative strategies to solve complex estimating challenges Experience with databased estimating platforms (CATS, InEight Estimate, Sage Timberline Estimating, On-Screen Take-Off, MCASES MII, IPE, HCSS or other) Experience with one or more scheduling software (Primavera P6, MS Project) Proven success in driving end-to-end estimating activities, encompassing plan development, team coordination, technical review, and formal presentation to key stakeholders and clients Ability to guide and mentor team members in estimating techniques and methodologies Positive attitude with strong relationship building skills Valid Driver’s License Authorization to work lawfully in the USA without sponsorship from Thiess Must be fluent in the English language

PHYSICAL REQUIREMENTS: Work is primarily performed in an office environment, with prolonged periods of sitting, typing, and viewing a computer screen May occasionally require standing, walking, or lifting objects weighing up to 25 lbs such as files, laptop equipment, or office supplies Must have adequate vision, hearing, and hand–eye coordination to perform computer and phone-based work effectively Occasional travel to project sites, meetings, or training may be required, which can involve driving or extended periods of sitting When visiting operational sites, the employee must comply with all site safety requirements and wear appropriate personal protective equipment (PPE) as needed Must be physically capable of safely performing the essential duties of the position with or without reasonable accommodation

ADDITIONAL INFORMATION: At Thiess we have a One HSE culture and want to ensure everyone is safe everyday: employees, families, and society. We are committed to our employees’ health and wellness including the prevention of illness. Although optional, we have a preference that all Thiess employees are vaccinated against COVID-19 and other serious illnesses.

Work schedule: This role follows a Monday-Friday schedule. Additional hours may be required to meet business needs

Travel: Ability to travel for site reconnaissance and interfacing with clients and stakeholders (domestic and some international travel may be required) Pre-Employment Requirements Drug/Alcohol Screening Background Check Fit-for-duty evaluation MSHA Part 48 Verification

Pay Range: $140,000-170,000 annual base salary USD

WHAT WE OFFER: A work culture that follows our company values of integrity, accountability, and innovation, all underpinned by safety Comprehensive medical benefits including private health insurance with premium coverage for the employees and competitively subsidized private health insurance for immediate family Employee Assistance Program (EAP) 401K retirement savings benefit with employer matching contributions Career development and opportunities domestic within the US, and potentially international PTO, Paid Holidays Possible domestic relocation assistance