# Sr. Cost Control Engineer at Mariana Minerals

Sr. Cost Control Engineer at Mariana Minerals in Houston, TX and 1 more. On-site, full-time, paying $140k–$180k. Posted October 21, 2026.

- Company: Mariana Minerals
- Location: Houston, TX and 1 more
- Workplace: On-site
- Job type: Full-time
- Pay: $140k–$180k
- Experience: 5+ years
- Posted: 2026-10-21
- Apply: https://jobs.ashbyhq.com/marianaminerals/df7ffd54-19c9-4922-bc46-9efff39ed2a7/application
- Source: https://jobmagic.ai/jobs/sr-cost-control-engineer-mariana-minerals-waszqn

## Requirements

- Education. BS in engineering, construction management, finance, or a related field

## Description

**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 against the risk register and report what is left honestly

- Produce cash flow. Maintain the project cash flow and funding curve for finance and treasury

- Verify payments. Review contractor invoices and progress claims against measured progress and contract terms

- Report. Create, issue and present the project cost report and the dashboards leadership actually opens

- Automate the pipeline. Cost data should move from the ERP, procurement, and the schedule into the report/dashboard without re-keying. Build the connections, the reconciliations, and the exception checks that catch a bad number before a person does

**Desired qualifications**

- Education. BS in engineering, construction management, finance, or a related field

- Experience. 5–12 years of project cost control on capital projects in mining, minerals, refining, chemicals, power, or heavy civil. Senior candidates will have owned cost on a project above $100M total installed cost

- Earned value in practice. You have applied earned value management on a live project, not only in training, and can describe where it broke down

- Systems. Hands-on with a project cost management system such as EcoSys, InEight, Prism, or Procore, and with an ERP such as SAP, Oracle, or NetSuite

- Data fluency. Advanced Excel, plus SQL, Power BI, or Python at a level where you build your own reporting instead of requesting it

- Change discipline. You have run a trend and change management process end to end and can say what you would do differently

- Accounting interface. Comfortable with commitments versus actuals, accruals, capitalization, and funding authorization mechanics

- Certification. AACE Certified Cost Professional or Certified Cost Technician, or PMI credentials, are a plus

### **Our culture is built on four principles:Everyone Gets Home Safe. **We never put speed or cost ahead of people.
**Extreme Ownership. **We take full responsibility for outcomes, relentlessly driving toward solutions.
**Engineer Out Requirements, then Automate. **We simplify, optimize, and then automate for scale.
**Share Your Legos.** We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.

**Join us as we build the future of responsible mineral sourcing and supply!**