Strategic advice and hands-on support across Australia
At OH&A, we specialise in commercial advisory services tailored to the construction and infrastructure industry. Whether you’re a subcontractor, contractor, developer, or asset owner, we partner with you to manage contract risk, maximise financial outcomes, and ensure your project’s commercial success.
Why Choose Us:
- Local expertise in NSW and QLD markets
- Our directors have over 45 years of industry experience
- Deep knowledge of Australian Standards (AS), GC21, NEC, and other major contract forms
- Proactive, transparent communication
Contract Expertise
Comprehensive strategies to grow, protect, and optimize your financial assets.
Risk & Cost Management
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Claims Resolution
Holistic wealth solutions designed for multi-generational financial security and growth.
Who we are...
OH&A is a specialist commercial advisory consultancy supporting a wide range of construction and infrastructure projects—including building, civil, transport, utilities, and energy—across Australia. With deep roots in the industry, we understand the pressures of delivering complex projects on time and within budget, while effectively managing evolving risks and contractual challenges.
Led by Experience:
Founded by Kevin O’Hara and Eoin Aylward, both qualified and seasoned Quantity Surveyors and Commercial Managers with over 45 combined years in the field, our team brings both technical knowledge and commercial insight to every engagement.
Our Values:
- Integrity – Straightforward, honest advice
- Expertise – Technical and commercial acumen
- Collaboration – Working as a true project partner
- Accountability – We stand by our recommendations
Our Mission:
To deliver strategic, practical, and commercial advice that drives better outcomes across the project lifecycle.
Services
We support main contractors, subcontractors, developers, private clients, and asset owners with tailored commercial solutions—from pre-contract planning through to final account negotiation.
Contract Advisory
Ensure contracts are well-drafted, clearly structured, and enforceable across all stages of the project.
- Contract drafting and negotiation
- Contract reviews and risk mapping
- Administration of AS, GC21, NEC, and bespoke contracts
- Subcontract alignment and flow-down clauses
Claims Dispute & Resolution
Protect entitlements and reduce conflict with expert claims and dispute support.
- Delay and disruption analysis
- Claims preparation and review
- Mediation and expert witness support
- Negotiation strategies
Commercial Risk Management
Identify, assess, and mitigate commercial risks early. We help clients maintain control of project costs, contract obligations, and risk exposure.
- Risk Registers and management
- Forecasting & cost-to-complete reviews
Commercial & Contract Management Secondment
When your project requires additional commercial expertise, OH&A provides experienced professionals on a short or long-term secondment basis. Our specialists integrate seamlessly into your team, providing hands-on support to manage commercial deliverables, reduce risk, and maintain control over project outcomes.
We offer secondment of:
- Commercial Managers
- Contract Managers
- Senior Contract Administrators
- Contract Administrators
- Expat Quantity Surveyors
- Dispute Resolution Experts
Whether you need project-wide support or targeted resourcing, our professionals bring deep technical skills, commercial insight, and a practical, solutions-focused approach.
AI in Contract Management
We assist clients to navigate the AI landscape in relation to contract reviews, negotiation and finalisation. Our support includes:
- Guidance on integrating AI tools into your contract review and administration workflows
- Interpretation and validation of AI-generated contract insights
- Human-led quality assurance to ensure accuracy and compliance
- Risk mitigation strategies
While AI offers speed and scale, sound commercial judgement remains essential. That’s where we come in—ensuring you get the best of both worlds: advanced technology and trusted advisory.
Procurement Strategy
From selecting the right delivery model to evaluating tenders, we design procurement strategies that are efficient, defensible, and commercially effective.
- Procurement planning
- Tender documentation and evaluation
- Delivery model selection (lump sum, D&C, etc.)
- Supplier negotiation
Cost Planning & Control
Effective cost planning is critical to maintaining financial control throughout your project. We support clients with clear reporting, proactive analysis, and commercially focused outcomes.
- Value engineering
- Claim preparation and negotiation
- Cash flow forecasting and cost reporting
- Final account preparation and negotiation
Get in touch...
We’re here to discuss your next project. Reach out for an initial consultation or proposal by email, phone or by completing the contact form, and one of our team will be in touch.
Commercial Advisory & Resourcing
Strategic advice and hands-on support across Australia.
