Staff Accountant

Alta Resource Technologies, Inc.

Staff Accountant

Location:

Boulder, CO

Reports To:

CFO

Alta is reinventing how the world sources critical minerals using protein‑based chemistry to extract rare earth elements and other essential materials from challenging feed stocks with unmatched selectivity. By dramatically reducing the cost and environmental impact of mineral separation, Alta is making it possible to unlock new sources of supply for 21st‑century technologies. As global demand accelerates, securing these materials has become one of the most urgent challenges facing U.S. competitiveness and national security.

Backed by top investors and government partners, Alta is growing fast and hiring mission‑driven scientists and engineers to help us scale our platform and transform the future of mining.

Alta is seeking a talented Staff Accountant to join our growing finance and operations team. This role will support day‑to‑day financial transactions that keep the business running smoothly. This role owns invoice management, supports the procurement process, and assists with regular budget tracking. The position also provides operational support across departments working with the R&D, engineering, and commercialization teams to ensure financial controls are in place and that spending is accurately recorded and reported.

This is an excellent opportunity for an early‑career accounting professional to gain broad exposure to finance in a dynamic, science‑driven and rapidly growing environment. The role requires full‑time, on‑site presence at our Boulder HQ and may occasionally involve off‑hours work.

• Process, review, and code all incoming vendor invoices accurately and in a timely manner, ensuring proper authorization and compliance with company purchasing policies.
• Reconcile vendor statements and resolve discrepancies promptly, maintaining positive working relationships with suppliers and service providers.
• Prepare timely payments and ensure all payment terms are met to avoid late fees or supply disruptions.
• Maintain organized, audit‑ready invoice records in the company's accounting system.
• Support month‑end close by ensuring all invoices for the period are processed and accruals are prepared for outstanding items.

• Assist in the procurement process by generating purchase orders upon receipt of approved purchase requisitions, ensuring POs are accurate, appropriately authorized, and consistent with budget.
• Track open purchase orders and follow up with vendors on delivery timelines, backorders, and shipment confirmations.
• Maintain the vendor master file, including onboarding new vendors, collecting banking details, and ensuring compliance with company vendor management policies.
• Support evaluation of vendor terms, pricing, and payment conditions and flag opportunities for improved payment terms or cost savings to the finance manager.
• Coordinate with the lab and operations teams to ensure procurement requests are submitted through proper channels and that spending is aligned with approved budgets.

• Assist in maintaining routine budget tracking across departmental cost centers, flagging variances from plan to the relevant budget owner and finance manager.
• Prepare and distribute regular budget‑vs‑actual reports for R&D, operations, and general‑administrative functions, supporting department heads in understanding their spending position.
• Maintain and update budget tracking spreadsheets and dashboards on a real‑time basis, ensuring data accuracy and completeness.
• Assist in the monthly financial close process, including account reconciliations, and journal entries.
• Help maintain the chart of accounts and ensure transactions are coded consistently.
• Support the preparation of materials for management reporting, board updates, and investor reporting as directed by the Controller or CFO.

• Serve as a financial liaison for the lab and operations teams helping staff understand procurement procedures, expense policies, and reimbursement processes.
• Process and reconcile employee expense reports, ensuring compliance with the…