The original firm of T. O’Connor & Sons was founded in 1894 in Topham Street by Thomas O’Connor, as a plumbing and gas fitting company. In the 1920’s Frank O’Connor took over with his brothers, Tom and Martin O’Connor, diversifying into sheet metal work, heating and ventilation and later progressing in to air conditioning after its invention.

With a move into industrial piping, a new premise was built at Gepps Cross and opened by Sir Thomas Playford in 1961. Under Frank and Martin’s guidance and after the leadership of Creagh O’Connor and Henry O’Connor, the company grew whilst undertaking major air conditioning contracts across the Australia and internationally. These works included construction on the US Embassy’s in Moscow and Cairo, along with, the Australian embassy in Bangkok which Alan Porter managed and, during this time, Andrew O'Connor managed three general construction projects in Honduras, Central America. One special building for O'Connors is 1 King William Street in Adelaide (the old AMP building) which was built and refurbished by T. O'Connor and is still serviced and maintained by O’Connors today.

With the formation of O’Connors in 1999 the brand continues benefiting greatly from the passion of the Managing Director Andrew O’Connor and the discipline of its General Manager Alan Porter. Their drive has led to O’Connors successful involvement in the health, education, retail and defence industries.

O'Connors was started by Andrew O'Connor with our founding Chair Malcolm Kinnaird AC, a former South Australian of the Year and a leading Australian engineer. Malcolm was followed by Creagh O’Connor who, during his time with O’Connors, has added his industry passion to the development of our people.

The culture of developing our (people) has continued for over a century with many from the days of T. O’Connor & Sons  now developing the current generation of leaders at O’Connors. At our new premises in Kent Town our teams are delivering new projects for South Australia and ensuring these new buildings are built with efficient mechanical systems for the long term. 

Latest News

O'Connors - Top 100 South Australian Companies

The list is a demonstration of the top performing companies for the year and celebration of the the state’s leaders and high achievers across sectors, and in a range of categories.

Telstra, Waymouth Street New Data Centre

O'Connors and Broadspectrum have worked closely with Telstra to design & construct cooling to new racks for a Telstra expansion.

O'Connors + BIM-MEP Construction Innovation Forum

BIM-MEP Australia is an offshoot of the AMCA developing national standards, processes and libraries of parts to use in BIM. O’Connors are actively involved in this initiative.

Adelaide Convention Centre - Stage 2 Completion

Our construction and commissioning team successfully completed stage 2; handover to the client was in July and the first events took place in August. The entire project (stage 1+2) is a testament to the whole O'Connors team.