Product Manager, Capital ProjectOS

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 how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply.

Role Overview:
We're looking for a Product Manager to own Capital ProjectOS: the platform that enables Mariana to build minerals infrastructure faster and more efficiently than anyone else in the industry.

This is a role for someone who understands the chaos of large capital projects: the handoff failures between engineering and procurement, the information silos between office and field, the death-by-spreadsheet that slows decision-making. You'll work with finance teams, project managers, engineers, and construction leads to build software that actually gets used and that fundamentally changes how projects get delivered.

You'll need to be a strong communicator who can build trust with stakeholders across very different disciplines. You'll need to navigate ambiguity, prioritize ruthlessly, and ship software that works in high-stakes, fast-moving environments.

The Product: Capital ProjectOS

CapitalOS is Mariana's integrated capital project execution platform. It's the system that coordinates engineering, procurement, construction, and commissioning for multi-hundred-million-dollar minerals infrastructure projects. Our goal is to develop 10 projects in 10 years and CapitalOS is how we’ll do it.

What Capital ProjectOS does:

• Enables smaller teams to deliver large-scale capital projects without the schedule and cost overruns that plague the industry

• Democratizes access and manages the flow of information across project teams, breaking down silos between engineering, procurement, construction, and commissioning

• Provides scaffolding, domain expertise, and context engineering to bring LLMs into engineering, procurement and construction workflows

• Delivers real-time feedback from field crews to project managers —the right data, to the right person, at the right time

• Decision support to understand the implications of trade-off decisions on schedules and budgets

Capital projects in mining and construction are notoriously over-budget and behind schedule. CapitalOS is how we change that.

What You'll Do

• Own the Capital ProjectOS roadmap: Define what we build, in what order, based on user needs and business impact

• Stakeholder management: Build deep relationships with finance, project management, engineering, procurement, and construction teams—understand their workflows, pain points, and needs

• Cross-functional delivery: Partner with software engineers, ML engineers, and domain experts to ship solutions that work in the field

• User research: Spend time with project teams (in SF and on-site) to understand how work actually happens—not just how it's supposed to happen

• LLM integration: Help define how we bring AI/ML capabilities into capital project workflows in ways that are useful, not gimmicky

• Process improvement: Identify opportunities to eliminate waste, reduce handoffs, and accelerate decision-making through software

What We're Looking For

Must Have

• 4-7 years in product management, with experience in enterprise software

• Strong communication and stakeholder management skills: you can build credibility with finance, engineering, and field teams

• Experience working on workflow tools, project management software, or enterprise platforms

• Demonstrated ability to ship products in complex, multi-stakeholder environments

• Comfort with ambiguity and fast-moving priorities

• Willingness to travel to project sites to understand how your product gets used

Nice to Have

• Background in chemical engineering, civil engineering, construction management, or project controls

• Experience with capital project delivery, EPC, or construction software

• Familiarity with LLMs/AI and how they can augment knowledge work

• Experience in mining, energy, infrastructure, or heavy industry

Why This Role

Large capital projects are one of the last frontiers of digital transformation. The tools that manage billion-dollar construction efforts are often decades old; spreadsheets, disconnected databases, and tribal knowledge.

At Mariana, you'll build the software that changes this. You'll see your work used on real project sites, by real teams, delivering real infrastructure. If you've been looking for a PM role where the stakes are high and the impact is tangible, this is it.

What It's Like to Work Here

Extreme Ownership – We take full responsibility for outcomes and drive relentlessly toward solutions.

Engineer Out, Then Automate – We simplify and optimize before we scale.

Share Your Legos – We collaborate openly, share knowledge freely, and help each other build better solutions.

Mariana is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected status.