Sr. Environmental Engineer

The role

The Sr. Environmental Engineer provides technical environmental engineering support across U.S. mining, processing, and refining project sites. This role involves conducting environmental studies, designing monitoring programs, and integrating environmental requirements into engineering and design decisions.

What you will do

• Conduct and oversee environmental technical studies including air quality modeling, water quality assessments, stormwater design, and waste characterization.
• Design and implement environmental monitoring programs for air, water, stormwater, and wildlife.
• Support integration of environmental requirements into FEL 1–3 and detailed design.
• Prepare technical sections of permit applications, EIS/EA chapters, and supporting engineering documentation.
• Support development, implementation, and continuous improvement of site-level Environmental Management Systems.
• Provide technical support for stormwater, spill prevention, waste management, and pollution-control programs.
• Assist in developing remediation and corrective action plans.
• Support due diligence technical reviews for acquisitions and new project development.
• Contribute technical data and analysis to corporate sustainability and ESG reporting.
• Partner with process engineering, operations, and legal on technical environmental questions.

Required qualifications

• Bachelor's or master's degree in Environmental Engineering, Civil/Environmental Engineering, Environmental Science, or a related field.
• 5+ years of environmental engineering experience in mining, energy, or large infrastructure.
• Working technical knowledge of environmental studies and modeling (air, water, stormwater) and monitoring program design.
• Familiarity with U.S. environmental regulations (CAA, CWA, RCRA, ESA, EPCRA) and their technical/engineering implications.
• Experience supporting permit applications, EIS/EA technical sections, or environmental engineering design packages.
• Strong analytical, technical writing, and project-prioritization skills.

Nice to have

• Experience with critical minerals (lithium, nickel, graphite, etc.) or refining/processing facilities.
• Experience with EMS design or implementation (ISO 14001 or similar frameworks).
• Familiarity with IFC/Equator Principles or ESG data reporting.
• EIT/PE, or progress toward professional engineering licensure.

About the company

Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies.