Supplier · Water & Sanitation, Construction, Consultancy & Legal

Guidera O'Connor

Last winAug 2025Nothing won in the last 12 monthsValue won per quarter, last three years
Contracts on record10$46M in total
Running now0Contracts still running
Next contract endingDec 2026$7.1M · Coliban Region Water Corporation
Biggest buyerRottnest Island Authority63% of their value
9contractssince 2012
$44.3Mwon in totallatest Aug 2025
$936Ktypical contractmost $685K to $4.5M
0last 12 monthsdown from $8.6M
1active now1 ends within a year
Biggest buyerRottnest Island Authority2 contracts · $28.7M · 65% of value

What they do

Guidera O'Connor supplies water and wastewater treatment works, including desalination plant design and construction, water treatment plant upgrades, pump and filtration installation, and dewatering upgrades.

Who buys from them

Its largest buyer is Rottnest Island Authority with 2 contracts worth $28.7M. Other buyers include Coliban Region Water Corporation, Central Highlands Water, SA Water Corporation and Department of Finance, across 6 buyers.

Rottnest Island AuthorityColiban Region Water CorporationCentral Highlands WaterSA Water Corporation(inactive) Department of Finance
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

Provision of Emergency Contractor Labour for KI by Guidera O'Connor Pty LtdMiscellaneous$1M09/12/2024Design and Construction of Cohuna WTP Upgrade by Guidera O'ConnorWater & Sanitation$7.1M15/08/2025Project Management Consulting Services Awarded to Guidera O'Connor by SA WaterConsultancy & Legal$1.2M05/08/2025Rottnest Island Desalination Plant Upgrade Design and Construct Contract Awarded to Guidera O'ConnorWater & Sanitation$28.7M30/07/2024Dewatering Upgrade at Ballarat South Wastewater Treatment PlantWater & Sanitation$4.5M26/07/2023Installation of Pumps and Filtration Units at Batavia Coast Maritime InstituteConstruction$853K25/11/2014Supply and Delivery of Filtration Units and Pumps to Batavia Coast Maritime InstituteWater & Sanitation$936K06/03/2014Beach Well Pump Upgrade at Batavia Coast Maritime InstituteInfrastructure$685K21/01/2013Design, Supply and Installation of Screen and Grit Removal System for Rottnest Island Waste Water Treatment PlantWater & Sanitation$105/04/2012Administration of Maintenance Construction for SA WaterConstruction$503K01/07/2025

Who they win it from

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

Most of their work comes from one buyer: Rottnest Island Authority, 63% of value.

Rottnest Island Authority$29M63%
Coliban Region Water Corporation$7.1M16%
Central Highlands Water$4.5M10%
SA Water Corporation$2.8M6%
(inactive) Department of Finance$1.5M3%
Other buyers$940K2%

Coming up

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

Contracts ending in the next three years1 contract · $7.1M
Today20282029

The next one ends December 2026 at Coliban Region Water Corporation.

Recompete radar

1 expiring in 12mo

Contracts nearing the end of their term. Some may go back out to tender when they expire.

Design and Construction of Cohuna WTP Upgrade by Guidera O'Connor
Expires in 26d$7.1M
Coliban Region Water Corporation

About them

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

Also traded asGuidera O'Connor, Guidera O'Connor Pty Ltd, GUIDERA O'CONNOR PTY LTD

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