Sr. Procurement Specialist - Construction

Mariana Minerals; San Francisco (CA); On-site; USD 120,000 - 160,000; Full time

Job summary

Mariana Minerals is seeking a hands-on Sr. Procurement Specialist to support capital project delivery across construction services.

You will own defined procurement scopes end-to-end, from strategy through contract award and execution, and directly impact project schedule and capital efficiency. This role emphasizes leading contracting, supplier selection, and strategic spend control while building scalable procurement processes.

Qualifications

• 5–7+ years of procurement experience in heavy industry, capital construction, infrastructure, or industrial projects.
• Experience leading competitive sourcing processes for construction.
• Strong contract negotiation skills.
• Clear understanding of commercial risk allocation.
• Proficient with ERP/procurement systems and structured documentation.

Responsibilities

• Lead pre-award, award, and post-award contracting activities for capital construction packages
• Develop and execute procurement strategies aligned with project schedules and critical path activities
• Drive commercial negotiations focused on total cost, risk allocation, and delivery certainty
• Support PO conversion, approvals, and procurement system execution
• Draft, review, and negotiate NDAs, MSAs, and construction work orders
• Manage change orders and commercial amendments in coordination with project teams
• Ensure documentation is structured, defensible, and audit-ready
• Analyze spend and identify savings or value-creation opportunities
• Support competition in the supplier market
• Conduct commercial risk assessments to reduce schedule exposure
• Help design scalable procurement processes as the company grows
• Improve cycle times and reduce friction in sourcing and approvals
• Contribute to building a disciplined, data-driven procurement function from the ground up

Skills

Procurement experience

Contract negotiations

ERP / procurement systems

Commercial risk assessment

Job 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.

Role Overview

Mariana Minerals is looking for a hands-on, commercially strong Sr. Procurement Specialist to support capital project delivery across construction services. This role is not transactional purchasing — you will own defined procurement scopes end-to-end, from strategy through contract award and execution, and directly impact project schedule and capital efficiency.

What You’ll Do

Own Capital Procurement Workstreams

• Lead pre-award, award, and post-award contracting activities for capital construction packages
• Develop and execute procurement strategies aligned with project schedules and critical path activities
• Drive commercial negotiations focused on total cost, risk allocation, and delivery certainty
• Support PO conversion, approvals, and procurement system execution

Manage Contracts & Commercial Risk

• Draft, review, and negotiate NDAs, MSAs, and construction work orders
• Manage change orders and commercial amendments in coordination with project teams
• Ensure documentation is structured, defensible, and audit‑ready

Drive Cost & Value

• Analyze spend and identify savings or value-creation opportunities
• Support competition in the supplier market
• Conduct commercial risk assessments to reduce schedule exposure

Build Better Systems

• Help design scalable procurement processes as the company grows
• Improve cycle times and reduce friction in sourcing and approvals
• Contribute to building a disciplined, data-driven procurement function from the ground up

What You’ll Bring

• 5–7+ years of procurement experience in heavy industry, capital construction, infrastructure, or industrial projects
• Experience leading competitive sourcing processes for construction
• Strong contract negotiation skills
• Clear understanding of commercial risk allocation
• Proficient with ERP/procurement systems and structured documentation

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!