O’Connors is committed to ensuring excellence and quality in everything we do to create systems for you that are productive, effective, and most of all efficient. We deliver.

We are an engineering based mechanical construction and services company. We value delivery and bring a whole of life perspective towards the systems performance and energy optimisation in your facility.

We are a cohesive team comprising of highly skilled professional and trades people with extensive experience working to deliver and maintain exceptional outcomes in our industry.

Established in 1999, O'Connors is an industry leading, South Australian, and private family owned mechanical services provider. We hold a reputation at the forefront of the industry and maintain the skills and resources necessary to handle any building services challenges.


Engineers +


Service +

Featured case studies

Bice Building Refurbishment


Osborne South Development Project


Adelaide Botanic High School


Latest News

OCONNORS RAP reaches implementation phase

I’m excited to share with you that we have had our reconciliation action plan (RAP) formally endorses by Reconciliation Australia as a #Reflect RAP.  
 Reconciliation Australia now officially accredits OConnors RAP and recognises us as a member of the RAP network.
We now commence our all-important implementation phase with a commitment to tangible actions, such as increasing Aboriginal and Torres Strait Islander employment, participating in external events and raising cultural awareness within our organisation. 
Our RAP is an aligned with our family culture and companies’ core values. It is becoming part of One O’Connors and is supported at all levels of our organisation.  Our vision is that through our actions, we can contribute to our nation’s shared goal of a reconciled, just and equitable Australia. Please find attached a copy of our reconciliation action plan.
I would like to thank all those involved in driving us to this stage, in particular Alberto O’Connor, Mark Liddy, Tammy Giles, Vincent Campagnale, Sarah Gorman, Clare Tippins, Jarrod Varley, Elizabeth O’Connor,  Dylan Cooper and James Tedmanson. 

 Regards, Andrew O'Connor, Managing Director

We Are Open and Monitoring the Spread of COVID-19

O’Connors and the building and construction industry at large, remains open.  

Professionalism and Customer Service

Customer Appreciation - O'Connors Professionalism and Customer Service. 

O'Connors Engineering Grant 2018

Recently, O'Connors selected the 2018 O'Connors Engineering Grant recipient - Princess Mae Castillo.