Job Description

The Senior Hydrogeologist is responsible for leading the assessment, planning, design, implementation, and optimization of mine dewatering, groundwater management, and hydrogeological monitoring programs that support safe and efficient mining operations. This position provides technical leadership for site-wide hydrogeological activities and serves as a key advisor to mine planning, geotechnical engineering, operations, environmental, and processing teams.

ESSENTIAL FUNCTIONS

• Provide technical leadership and oversight for mine dewatering, groundwater management, and surface water management programs.
• Develop and execute strategic dewatering plans aligned with short-, medium-, and long-range mine plans.
• Lead the design, construction, and commissioning of dewatering wells, pumping systems, horizontal drains, piezometers, monitoring wells, and related infrastructure.
• Lead weekly dewatering and water management meetings with cross-functional site stakeholders.
• Develop, calibrate, and maintain groundwater flow models, water balance models, and predictive hydrogeological analyses to support operational and strategic decision-making.
• Prepare technical reports, memoranda, presentations, and regulatory documentation that communicate findings, recommendations, and project status.
• Manage hydrogeological consultants, drilling contractors, and service providers, including scope development, contractor oversight, and performance evaluation.
• Prepare annual operating and capital budgets for hydrogeological programs, including drilling, monitoring systems, dewatering infrastructure, groundwater modeling, and consulting services.
• Mentor and provide technical guidance to junior hydrogeologists, technicians, interns, and other site personnel.
• Support permitting, regulatory compliance, and environmental reporting activities related to groundwater and surface water management.

Qualifications

KNOWLEDGE, SKILLS, AND ABILITIES

• Advanced knowledge of groundwater hydrology, hydrogeology, mine dewatering, aquifer testing, and groundwater monitoring systems.
• Strong understanding of the interaction between groundwater conditions, pit slope stability, and mine planning.
• Demonstrated experience designing and managing dewatering systems in a mining environment.
• Advanced proficiency with groundwater modeling software, water balance modeling tools, GIS platforms, and database management systems.
• Strong understanding of well design, pumping systems, hydraulic testing, and groundwater monitoring instrumentation.
• Knowledge of relevant environmental regulations, water rights, permitting requirements, and industry best practices.

EDUCATION AND EXPERIENCE

• Bachelor's degree in Hydrogeology, Geology, Hydrology, Geological Engineering, or related discipline required.
• Master's degree in Hydrogeology, Hydrology, or related field preferred.
• Professional Geologist (PG), Registered Geologist (RG), or equivalent professional registration preferred or ability to obtain.
• Minimum of 8-12 years of progressively responsible hydrogeological experience, preferably in the mining industry.
• Demonstrated experience leading mine dewatering programs, groundwater investigations, and hydrogeological studies.
• Experience with groundwater flow modeling and water balance development in a mining environment.
• Experience managing consultants, contractors, and multidisciplinary technical projects.
• Valid driver's license required.

The Ray Mine is located 64 miles southeast of Phoenix and 70 miles northeast of Tucson. We have a robust carpool/vanpool program and encourage employees to participate. Employees save more than 50% of their commuting costs while reading, relaxing, or enjoying the view.

ASARCO LLC is an equal opportunity employer. Candidates must possess a current and valid
driver’s license. Offers of employment are contingent upon a successful criminal
background check and pre-employment physical including a drug screen (hair analysis).