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Sr. Planner and Scheduler

Mariana Minerals· Project & Construction Management
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Houston, TXFull-timePosted 1w ago

About the role

Planner/Scheduler responsible for owning and integrating the schedule for Mariana Minerals’ capital projects, from Level 1 leadership summaries to Level 4 field detail. Builds, defends, and maintains schedules, drives critical path analysis, and enables data-driven decision-making through what-if scenarios, risk analysis, and automated tooling.

Responsibilities

  • Own the integrated schedule. Build and maintain Level 1 through Level 4 critical path schedules in Primavera P6 covering engineering, procurement, fabrication, construction, commissioning, and start-up, and keep them integrated across owner and contractor scopes
  • Set the structure. Define the work breakdown structure, activity codes, calendars, and resource and cost loading, aligned to the cost breakdown structure so cost and schedule reconcile
  • Own the critical path. Run critical path, float, and near-critical analysis every cycle, state plainly which activities are driving the date, and recommend recovery options when they slip
  • Control the baseline. Establish and maintain the baseline, run schedule changes through a documented change process, and keep the variance history intact
  • Hold contractors to a standard. Review submitted schedules for logic quality, constraints, open ends, and float manipulation using a DCMA-style health check, and work findings to closure
  • Measure progress. Define rules of credit with cost control, collect and validate progress, and produce S-curves, earned-value inputs, and workhour histograms that match what is happening in the field
  • Drive the look-ahead process. Run ninety-day, six-week, and weekly look-aheads with construction and commissioning leads, and tie them back to the master schedule
  • Support risk analysis. Build the schedule model for quantitative schedule risk analysis and translate P50 and P80 results into decisions on contingency and milestones
  • Report with judgment. Write the monthly schedule narrative, milestone status, and the analysis behind any date change, and present it to project teams. Comfortable presenting to executive leadership
  • Automate the cycle. Statusing, health checks, and report production are rules-based work. Build, or partner with software engineers to build, the checks and pipelines that turn a weeks-long monthly cycle into hours

Qualifications

  • Experience. 5–12 years planning and scheduling capital projects in mining, mineral processing, refining, chemicals, power, or heavy industrial, with hands-on work on an integrated EPC schedule through construction and commissioning
  • Primavera P6. Expert and current: building, analyzing, and defending schedules, not only statusing them
  • Critical path fundamentals. Logic, constraints, calendars, total and free float, and the ability to defend a critical path when it is challenged
  • Data fluency. Comfortable with P6 data outside the P6 interface: XER and XML exports, SQL, Power BI, or Python, and interested in automating repeatable work
  • Progress measurement. Experience setting rules of credit and reconciling reported progress against physical work in place
  • Schedule quality. Working knowledge of the DCMA 14-point assessment or a comparable schedule health standard
  • Field credibility. You have spent real time on a construction site and can hold a conversation with a superintendent
  • Education. BS in engineering, construction management, or a related field. Equivalent field planning experience is considered
  • Certification. PMI Scheduling Professional (PMI-SP) or AACE Planning and Scheduling Professional (PSP) is a plus
  • Schedule risk tools. Acumen Fuse, Safran Risk, Primavera Risk Analysis, or @Risk
  • Commissioning and start-up. Planning for commissioning, start-up, and system-based turnover
  • Delay analysis. Forensic delay analysis, time impact analysis, and extension of time assessment
  • Schedule ownership. Has owned an integrated EPC schedule end to end, rather than a portion of one
  • Owner-side experience. Time on the owner's side of the table managing multiple EPC or EPCM contractors
  • Tool building. A track record of building scripts, apps, or dashboards that automate schedule creation, updating, reporting, or visualization
Last updated Oct 14, 2026. Interested? Apply on the company site.

About Mariana Minerals

We to the Future of Minerals, verify the mineral supply chain.

Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.

software-firstmineralsenergyAIdefense
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