SlipstreamJobs tracks this role from the company's public career site. Apply directly on the employer's site.
Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying critical minerals for modern energy, AI, and defense technologies. The company combines deep industry expertise with advanced software, automation, and data-driven decision-making to reimagine the minerals supply chain.
You will lead and scale Mariana's Accounting and FP&A team as the company grows from two flagship projects toward a broader portfolio of commercial mining and mineral-processing operations. Reporting to the Co-Founder & CFO, you own the finance organization's execution end-to-end: technical accounting, close, audit, and controls alongside budgeting, forecasting, and cross-functional business partnering.
Key responsibilities include:
**FP&A & Strategic Finance:** Lead company-wide budgeting, forecasting, and long-range planning across corporate and project-level P&Ls, including development of Mariana's internally-developed FP&A tools and BizOs software platform. Partner directly with the CEO, CFO, and project leadership on capital allocation, unit economics, and project-level financial modeling for Lithium One, Copper One, and future sites. Own board and investor reporting, including monthly and quarterly board packages and investor updates. Build the financial infrastructure, reporting cadence, and KPIs needed to support Mariana's plan to stand up ten commercial projects over the next decade.
**Accounting & Controllership:** Own the monthly, quarterly, and annual close process in conjunction with the Controller, ensuring accurate, timely, and audit-ready financials across all entities and projects. Serve as the primary point of contact for external auditors and tax advisors; manage the annual audit process end-to-end. Set and maintain technical accounting policy, including capitalized project costs, inventory and commodity accounting, revenue recognition, and foreign currency. Build and strengthen internal controls and financial systems in anticipation of future capital raises and eventual public-company readiness. Oversee treasury and cash management across a balance sheet funded by venture capital and project-level capital structures.
**Team & Systems Leadership:** Lead, coach, and develop Mariana's existing Accounting and FP&A team as headcount and project count scale. Evaluate and implement finance systems and tooling, including ERP and planning tools, to replace manual processes. Represent finance in cross-functional planning with Engineering, Operations, Legal, and Talent. Identify opportunities to improve financial processes, reporting, and automation.
**Requirements:**
- 10+ years of progressive finance and accounting experience, including senior leadership spanning both accounting/controllership and FP&A
- Track record of scaling a finance function at a capital-intensive, high-growth company (hardware, industrials, energy, or mining), ideally through significant fundraising or capital deployment
- Strong understanding of GAAP and core accounting principles; CPA or equivalent technical accounting credential strongly preferred
- Direct experience owning external audit relationships and board or investor reporting
- Experience building or upgrading financial systems and processes as a company scales
- Experience with ERP or accounting systems and financial planning tools
- Background in natural resources, energy, infrastructure, or other capital-intensive businesses is a plus
- Experience partnering with government or regulated-industry stakeholders is a plus
- Strong communication and interpersonal skills, with ability to work cross-functionally and manage competing priorities in a fast-paced environment
