Mining Engineering, Feasibility Studies & EPC Contract Delivery — Perth, WA

Engineering · Project Delivery · Senior Advisory

The specialist partner for advancing critical projects.

Feasibility through construction. Principal-level delivery across Australia and Sub-Saharan Africa. Twenty years of projects delivered.
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What sets Harrington O'Sullivan apart:

Principal-Led Delivery

Your project led by the company principal.

Proven in Hard Environments

Five countries. Twenty years. Real outcomes.

Senior Representation

Ministerial access backed by engineering credibility.

  • What sets Harrington O'Sullivan apart:

    Principal-Led
    Delivery

    Your project led by the company principal.

    Proven in Hard
    Environments

    Five countries. Twenty years. Real outcomes.

    Senior
    Representation

    Ministerial access backed by engineering credibility.

  • What We Deliver

    Six disciplines. One accountable team. Every engagement led at principal level.
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    Feasibility Studies

    Pre-feasibility and bankable feasibility studies that give boards the confidence to commit capital. Technically rigorous, commercially grounded, and delivered to investment-decision standard.

    Engineering Design & Development

    Multi-discipline engineering from concept through construction. Digital engineering, mechanical, civil, and process design delivered for remote, demanding environments.

    Project Services

    Scheduling, cost control, document management, and project administration. The nuts and bolts that keep scope, budget, and programme together.

    Commercial & Contracts

    Procurement strategy, contract structuring, and cost control embedded in project delivery. Commercial discipline that protects your budget and your programme.

    Project Management

    Full delivery accountability from scope definition through to commissioning. The same principal who scopes your project delivers it.

    Senior Advisory

    Government engagement, regional industry positioning, and strategic project advisory. Senior representation at the conversations that determine whether projects get funded.
  • Choose Us

    Why Harrington O'Sullivan

    GET IN TOUCH

    Principal-Led Delivery

    Every project gets George Harrington’s direct involvement. You’re not paying for overhead you’re paying for the engineer who gets it -done.

    Proven in Hard Environments

    From the Pilbara to the DRC, we’ve delivered in environments where failure carries real consequences. Twenty years, five countries, no excuses.

    Senior Representation

    We don’t just deliver projects – we sit at the table with ministers and regional stakeholders when projects need government support to progress.

    Feature Projects

    Our Projects

    Principal-led engineering, delivery, and advisory services built for complex mining and infrastructure environments.

    GHANA

    ATLANTIC LITHIUM

    Study Manager on Ghana’s first lithium mine feasibility

    WESTERN AUSTRALIA

    PERMADAN UREA/GAS

    Principal-led engineering, delivery, and advisory services built for complex mining and infrastructure environments.

    KALGOORLIIE

    ROCKTIVITY / NEPEAN NICKEL MINE

    WA Senior Advisory – four substantive ministerial and industry outcomes in a single evening.

    Trusted by

    Who We Are

    Meet George Harrington

    George Harrington has spent more than two decades delivering complex mining and infrastructure projects across Australia and Sub-Saharan Africa.



    Raised on building sites and the family farm in Ireland, George brings practical field experience combined with strategic advisory capability - a rare combination in the engineering sector.

    Every Harrington O'Sullivan engagement receives direct principal-level involvement. No layers of management. Just experienced leadership from start to finish.
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    Ready to talk about your project?

    Just a direct conversation with the principal who'll deliver your project. Get in touch and we'll take it from there.
    Enquiry Form
    No junior staff, no handoffs.