Advisory, Engineering, Feasibility Studies & EPC Contract Delivery
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.
Get In TouchWhat 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:
Services
Every capability your project needs, delivered by the same team from feasibility through construction.
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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.
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Engineering Design & Development
Multi-discipline engineering from concept through construction. Digital engineering, mechanical, civil, and process design delivered for remote, demanding environments.
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Project Services
Scheduling, cost control, document management, and project administration. The nuts and bolts that keep scope, budget, and programme together.
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Commercial & Contracts
Procurement strategy, contract structuring, and cost control embedded in project delivery. Commercial discipline that protects your budget and your programme.
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Project Management
Full delivery accountability from scope definition through to commissioning. The same team who plans your project is the one who delivers it.
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Senior Advisory
Stakeholders advisory, regional industry positioning, and strategic project advisory. Senior representation at the conversations that determine whether projects get funded.
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Why Harrington O'Sullivan
Principal-Led Delivery
Every project gets principal level direct involvement, thus reducing overhead slippage with focused deliverable outcomes.
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 regional stakeholders when projects need support to progress.
Featured Projects
Our Projects
Principal-led engineering, delivery, and advisory services built for complex mining and infrastructure environments.
ATLANTIC LITHIUM
Study Manager on Ghana’s first lithium mine feasibility
PERMADAN UREA/GAS
Large-scale project delivery for one of WA's most significant industrial developments.
ROCKTIVITY / NEPEAN NICKEL MINE
WA Senior Advisory for growth stage critical mineral company's in early re-start cycle.
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.
Originating from grass-roots, coal facing commercial and industrial family lineage, 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.
get in touchOriginating from grass-roots, coal facing commercial and industrial family lineage, 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.
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.
From concept to completion