Advisory, Engineering, Feasibility Studies & EPC Contract Delivery
Engineering Design & Development
Multi-discipline engineering design from concept through construction. Mechanical, civil, and process capability delivered by mining engineers who know what remote sites demand.
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:
What Our Engineering Design Delivers
Engineering design that is built around site realities, not produced in a vacuum. These are the capabilities we bring to every project.
Design Integrated With Delivery
Engineering design developed alongside procurement, construction planning, and logistics. Design that accounts for how it actually gets built, where it gets built, and who builds it.
Multi-Discipline Capability Under One Principal
Mechanical, civil, process, and digital engineering coordinated by a single accountable point of contact. No fragmented scopes, no gaps between disciplines, no coordination risk passed to you.
Engineered for Remote Conditions
Design that accounts for the realities of remote and demanding environments. Access constraints, extreme climate, limited local supply chains, and construction in locations where rework is not an option.
From Concept to Construction-Ready
Conceptual, preliminary, and detailed engineering design delivered to the level of completeness your project phase requires. Every deliverable structured to move the project forward, not sit in a filing cabinet.
Our Services
Discuss Your Project
Tell us about your project and we will be in touch directly. No forms, no sales team.
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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.
FAQ
Frequently Asked Questions
Common questions about our engineering design services and how we deliver them.
What engineering disciplines do you cover?
We deliver engineering design across mechanical, civil, process, and digital disciplines. All coordinated under one principal with full accountability for the integrated output.
How is your engineering design different from a traditional consultancy?
We integrate engineering design with delivery. Design is not produced in isolation and handed over. It is developed alongside procurement, construction planning, and site logistics so it works when it reaches the ground. Our mining engineers in Australia have delivered in the environments where that integration matters most.
Do you deliver engineering design for international projects?
Yes. We have delivered engineering design for mining projects across Australia and Sub-Saharan Africa, including remote locations in Ghana and the Democratic Republic of Congo. We understand the access, logistics, and supply chain constraints that remote international projects face.
What stage of engineering design do you handle?
We cover conceptual, preliminary, and detailed engineering design. The level of completeness is matched to your project phase, whether that is supporting a feasibility study or producing construction-ready packages.
Can you take over engineering design from another firm?
Yes. We can review, audit, and continue engineering design started by another consultancy. We assess what has been delivered, identify gaps or risks, and pick up the scope with full accountability for the final output.
Need Engineering Design That Survives Site?
Talk to us directly about your project. No intake forms, no sales team. Every conversation starts with the principal.