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 looking for a commercially strong, hands-on Procurement Manager, Construction to lead procurement of construction and installation contracts for our capital projects, including site work, civil, structural, mechanical, piping, and E&I packages.

This is a senior individual contributor role. You will own your category end-to-end, from strategy and bid packages through award, execution, and closeout, leading cross-functional teams without direct reports. Your decisions will directly shape project schedule, capital efficiency, and commercial risk.

What You’ll Do

Lead Construction Procurement

• Develop contracting strategies for construction packages, selecting contract type (lump sum, unit price, T&M, cost reimbursable) and package splits based on scope maturity, schedule, and risk.

• Prepare and run competitive bid packages, including contractor prequalification, pre-bid meetings, and site walks.

• Lead bid leveling, clarifications, and negotiations, and make award recommendations through the company’s approval thresholds.

• Set up MSAs and work orders for repeat and phased construction work.

Lead Cross-Functional Teams

• Lead package teams of construction management, engineering, project controls, HSE, finance, and legal to align on scope, schedule, and commercial strategy.

• Run technical and commercial evaluations with stakeholders and drive the group to a clear, defensible award decision.

• Mentor project teams and procurement colleagues on negotiation, commercial risk allocation, and contract administration.

Own Contracts & Change Management

• Negotiate construction terms, including risk allocation, insurance and bonding, retention, liquidated damages, payment terms, and warranty.

• Manage change orders, claims, and disputes with field and project controls teams, verifying pricing against contract rates and markups.

• Oversee progress billing, lien waivers, and closeout documentation so records are complete, defensible, and audit-ready.

Drive Cost & Value

• Build and maintain a qualified contractor base in our project regions, assessing safety performance, capacity, and financial strength.

• Benchmark labor rates, unit prices, and markups, and use historical data to inform estimates and negotiations.

• Identify and mitigate labor availability, schedule, and counterparty risk across the project portfolio.

• Track and report savings, cycle times, and contractor performance to leadership.

Build Better Systems

• Own the design and continuous improvement of construction contracting templates, processes, and approval workflows.

• Partner with software teams to automate sourcing, bid leveling, and contract administration.

• Establish the metrics, controls, and reporting that make procurement a disciplined, data-driven function.

Desired Qualifications

• 10+ years of procurement or contracts experience in:

• Construction contracting for industrial, mining, or process facilities

• Civil, structural, mechanical, piping, or E&I packages

• Capital projects in owner, EPC, or EPCM environments

• Proven ability to lead cross-functional teams without direct authority, including serving as the procurement lead on major capital projects.

• Track record leading competitive bids and negotiations for multimillion-dollar construction contracts.

• Deep understanding of construction contract types and terms, including insurance, bonding, retention, and liquidated damages.

• Hands-on experience with field change management, progress billing, and contract closeout.

• Proficient with ERP/procurement systems and structured documentation; comfortable with data and eager to automate.

• Strong communicator with executives, project leaders, and suppliers.

• Bachelor’s degree in construction management, engineering, business, or a related field; CPSM, CPM, or similar certification 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!