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Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying critical minerals for modern energy, AI, and defense technologies. The company is reimagining the minerals supply chain through deep industry expertise combined with advanced software, automation, and data-driven decision-making.
As Senior Environmental Engineer, you will provide technical environmental engineering support across U.S. mining, processing, and refining project sites. Reporting to the Global Environmental Permitting Lead, you will apply your engineering background to environmental studies, permitting technical support, monitoring program design, and integration of environmental requirements into engineering and design decisions across FEL 1–3, detailed design, construction, and operations phases.
Key responsibilities include conducting and overseeing environmental technical studies (air quality modeling, water quality/hydrology assessments, stormwater design, waste characterization) supporting permitting and compliance across multiple concurrent projects. You will design and implement environmental monitoring programs (air, water, stormwater, wildlife) and analyze results to support compliance reporting and technical decision-making. You'll support integration of environmental requirements into design phases, partnering with process and civil engineering teams on technical trade-offs, and prepare technical sections of permit applications, EIS/EA chapters, and supporting engineering documentation.
You will support development, implementation, and continuous improvement of site-level Environmental Management Systems (EMS), provide technical support for stormwater, spill prevention, waste management, and pollution-control programs, and assist in developing remediation and corrective action plans. The role requires flexibility across multiple active projects and shifting priorities, delivering quality technical work under compressed timelines. You will support due diligence technical reviews for acquisitions and new project development, contribute technical data to corporate sustainability and ESG reporting, and partner with process engineering, operations, and legal on technical environmental questions.
REQUIREMENTS:
Required: Bachelor's or master's degree in Environmental Engineering, Civil/Environmental Engineering, Environmental Science, or related field. 5+ years of environmental engineering experience in mining, energy, or large infrastructure with demonstrated ability to work effectively in fast-paced, multi-project environments. 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.
Preferred: 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.
