marianaminerals · Houston, TX
Skills: Python, SQL
ABOUT MARIANA MINERALS 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. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making. The role We are hiring a Cost Control Engineer to own the cost baseline, the forecast, and change control on Mariana's capital projects. You will build the cost breakdown structure, convert the sanctioned estimate into a control budget, track commitments and actuals, and produce the forecast at completion that the business plans against. The role sits between engineering, procurement, construction, and finance — the path where a commitment becomes an accrual becomes an invoice becomes a capitalized asset — and your job is to make sure the number is the same in all four places. Cost control here is not a monthly report assembled by hand. The reporting is expected to come out of the system and building that pipeline is as much the job as running it. What you'll do - Set the baseline. Build the WBS and cost breakdown structure with the planner and estimator, convert the sanctioned estimate into a control budget, and lock it - Track commitments and actuals. Purchase orders, subcontracts, change orders, and field costs, reconciled to the ERP every month with no unexplained variance - Forecast. Maintain estimate to complete and estimate at completion by control account, with the basis for each forecast written down rather than carried in your head - Measure earned value. Set rules of credit with the planner, measure physical progress, and report cost and schedule performance at a level where someone can act on it - Run the trend and change process. Identify potential changes early, quantify them, route them for approval, and keep the approved budget log clean - Manage contingency drawdown. Track contingency and management reserve…
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