Supplier · Consultancy & Legal, Construction, Miscellaneous

O'Connor Marsden & Associates

Won in the last 12 months$8.4M▲ 39% on the year beforeValue won per quarter, last three years
Contracts on record512$60M in total
Running now0Latest win Nov 2026
Next contract endingNov 2026$11K · Office of the Director of Public Prosecutions
Biggest buyerDepartment of Defence7% of their value
296contractssince 2009
$37.8Mwon in totallatest Sept 2026
$46Ktypical contractmost $23K to $110K
$5.1Mlast 12 monthsup from $3.2M
29active now19 end within a year
Biggest buyerChief Minister, Treasury and Economic Development Directorate2 contracts · $3.3M · 9% of value

What they do

O'Connor Marsden & Associates supplies probity advisory, risk and audit, and assurance services to government agencies, including probity advice for major infrastructure projects and internal audit programs.

Who buys from them

Its largest buyers include the Chief Minister, Treasury and Economic Development Directorate, Department of Defence, Department of Health, Disability and Ageing, Sydney Metro, and Department for Infrastructure and Transport. It has 81 buyers.

Department of DefenceTransport and Main RoadsChief Minister, Treasury and Economic Development DirectorateDepartment of Health, Disability and AgeingSydney Metro

Contract size

Contracts typically range from $23K to $110K, with a median of $46K. Its largest contracts include risk and audit services for the Chief Minister, Treasury and Economic Development Directorate at $3.3M, probity advisory for the North-South Corridor Torrens to Darlington Project at $1.9M, contract compliance audit for the Department of Education at $1.7M, probity advisory for Sydney Metro Projects at $1.6M, and probity advisory for the Central West Orana Renewable Energy Zone at $1.5M.

Recent activity

In the last 12 months, 29 contracts worth $5.1M were awarded. 29 contracts are active, with 19 ending within 12 months, including probity advisory for the Whyalla Steelworks sale ending Oct 2026 and risk and audit services for the Chief Minister, Treasury and Economic Development Directorate ending Nov 2026.

Built from awarded contracts on record

What they win

How much they win each year, the size of a typical contract, and every contract on record.

Contract history

Probity Advisory Services for North-South Corridor Torrens to Darlington ProjectConsultancy & Legal$1.9MProvision of Professional Services to the Department of the Premier and CabinetConsultancy & Legal$0Provision of Probity Services to NSW Reconstruction Authority for RHP ProgramConsultancy & Legal$161K09/06/2025Provision of Probity Advisory Services to the Department for Energy and Mining for the Sale of the Whyalla SteelworksConsultancy & Legal$220K07/10/2025Provision of Probity and Governance Services to Department of Health, Disability and AgeingConsultancy & Legal$138K07/07/2023Internal Audit Services Contract Awarded to O'connor Marsden & AssociatesConsultancy & Legal$79K01/12/43646Provision of ICT Sourcing Partner services to Department of Health, Disability and AgeingIT & Software$531K27/05/2025Internal Audit Services for Risk Management Framework at DDHHSConsultancy & Legal$124/12/2015Provided Probity Services for the Wagering Advertising Opt-out Register to the Australian Communications and Media AuthorityConsultancy & Legal$25K29/10/2026Cost Assurance of Rehabilitation Works Cost Estimate for Remote Infrastructure awarded to O'CONNOR MARSDEN & ASSOCIATES PTY LIMITEDConsultancy & Legal$47K28/10/2026

Who they win it from

Their biggest government buyers and how much of their work each one is.

Department of Defence is their biggest buyer at 7% of value, across 5 buyers shown.

Department of Defence$4.4M7%
Transport and Main Roads$3.4M6%
Chief Minister, Treasury and Economic Development Directorate$3.3M5%
Department of Health, Disability and Ageing$2.9M5%
Sydney Metro$1.9M3%
Other buyers$44M74%

Coming up

Contracts that end soon and may go back out to tender.

Contracts ending in the next three years25 contracts · $5.7M
Today20282029

The next one ends November 2026 at Office of the Director of Public Prosecutions.

About them

Company details, where they work and the names they trade under.

Also traded asCONNOR MARSDEN ASSOCIATES, O’Connor Marsden & Associates, O’Connor Marsden & Associates Pty Ltd, O’Connor Marsden & Associates Pty Limited (OCM), O’Connor Marsden & Associates Pty Ltd, O'Conner Marsden and Associates, O'Conner Marsden and Associates Pty Ltd, O'Conner Marsden & Associates, OCONNER MARSDEN & ASSOCIATES, O'Connor Marsden, OConnor Marsden, O'CONNOR MARSDEN, O'Connor Marsden and Associated Pty Limited, O’Connor Marsden and Associated Pty Limited, O'Connor Marsden and Associates, O'Connor, Marsden and Associates, O CONNOR MARSDEN and ASSOCIATES, O'CONNOR MARSDEN and ASSOCIATES, O'CONNOR MARSDEN AND ASSOCIATES, OCONNOR MARSDEN AND ASSOCIATES, O'Connor Marsden and Associates (OCM) Pty Ltd, O'CONNOR MARSDEN AND ASSOCIATES P/L, oconnormarsdenandassociatespty, O Connor Marsden and Associates Pty, O'CONNOR MARSDEN AND ASSOCIATES PTY, O'CONNOR MARSDEN AND ASSOCIATES PTY LIMI, O'Connor Marsden and Associates Pty Limited, OConnor Marsden and Associates Pty Limited, O'CONNOR MARSDEN AND ASSOCIATES PTY LIMITED, OCONNOR MARSDEN AND ASSOCIATES PTY LIMITED, O'Connor Marsden and Associates Pty Ltd, OConnor Marsden and Associates Pty Ltd, O'CONNOR MARSDEN and ASSOCIATES PTY LTD, O’Connor Marsden and Associates Pty Ltd (OCM), oconnormarsdenassoc, O'Connor Marsden & Assoc., O'connor Marsden & Associates, O'Connor Marsden & Associates, O'Connor Marsden Associates, O''CONNOR MARSDEN & ASSOCIATES, O'CONNOR MARSDEN & ASSOCIATES, OCONNOR MARSDEN & ASSOCIATES, OCONNOR MARSDEN ASSOCIATES, O'CONNOR MARSDEN & ASSOCIATES (OCM), O'Connor Marsden & Associates P, O'Connor Marsden & Associates P/L, O'CONNOR MARSDEN & ASSOCIATES P/L, O'CONNOR MARSDEN & ASSOCIATES PTY, O'Connor Marsden & Associates Pty L, O'CONNOR MARSDEN & ASSOCIATES PTY L, O'CONNOR MARSDEN & ASSOCIATES PTY LIMITE, O'connor Marsden & Associates Pty Limited, O’Connor Marsden & Associates Pty Limited, O Connor Marsden & Associates Pty Limited, O'Connor Marsden & Associates Pty Limited, O’Connor Marsden & Associates Pty Limited, OConnor Marsden & Associates Pty Limited, O'CONNOR MARSDEN & ASSOCIATES PTY LIMITED, O'CONNOR MARSDEN & ASSOCIATES PTY LIMITED., OConnor Marsden & Associates Pty Lt, O'Connor Marsden & Associates Pty Ltd, O’Connor Marsden & Associates Pty Ltd, O’Connor Marsden Associates Pty Ltd, O'Connor Marsden & Associates PTY LTD, O'CONNOR MARSDEN & ASSOCIATES PTY LTD, O'Connor Marsden & Associates Pty Ltd t/as, O'Connor Marsden & Assoc. Pty Ltd, O'Connor Marsden Pty Ltd, O'Connor Marsdon & Associates

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Open tenders that match their work

Tasmanian Government: Registration for Probity Adviser DirectoryCloses 1 JanConsultancy & LegalCost Planning Services for New National Convention and Entertainment CentreCloses 8 DecConsultancy & LegalNSW Government Performance and Management Services PrequalificationCloses 28 FebConsultancy & LegalFinancial Statement Audit Services for Australian Maritime Safety Authority and Australian Reinsurance Pool CorporationCloses 10 DecConsultancy & LegalInternal Audit Services for NSW Electoral Commission — Performance and Management Services Scheme (SCM0005) Category 6ACloses 2 DecConsultancy & LegalStanding Offer Panel for Code of Conduct and Inability InvestigationsCloses 3 MayConsultancy & LegalOMID Pathways Mentoring and Retention Organisation — Department of Transport and Major InfrastructureCloses 17 NovEducation & TrainingPrisoner Movement and In‑Court Management Services — South Australia (Including Young Detainees)Closes 30 NovPublic Safety & SecurityInternal Audit Services for the Town of Port Hedland (2027–2029)Closes 18 NovConsultancy & LegalInternal Audit Services Contract for Nature ParksCloses 19 NovConsultancy & LegalCost Concurrence Peer Review Services for Future Fleet Program – Transport for NSWCloses 27 NovConsultancy & LegalProject Management, Contract Administration and Construction Surveillance Panel – Melton City CouncilCloses 11 DecConsultancy & Legal

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