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Brandon & Associates Pty Ltd

Wilsonton, QLD 4350



Brandon & Associates, since 1956 remains Queensland`s largest rural based consulting engineering firm, operating across South-West and Central Queensland.

Initially starting with one staff member in 1956, our business has grown significantly to now employ a dedicated network of professionals spread across our offices in Chinchilla, Roma and Toowoomba. We also have full-time staff based in serveral locations for varying periods such as Dalby, Tara, Kingaroy, Warwick, Quilpie and Miles.

Our longevity is supported by our high-level of repeat clients, who value our personalised, professional and practical approach, from a team passionate about what they do.

As the only consulting engineering practice located between Toowoomba and Barcaldine, our aim is to provide our clients with a complete solution-based service experience, where they can receive the best advice and results from our knowledgeable team. We take a personal, professional, practical and low-overhead approach, offering a diverse range of engineering solutions in the civil, structural, geotechnical, environmental and local government fields from design through to project management.

We take great pride in having expert local knowledge of the areas we live and work in. This provides our clients ready access to professionally qualified staff based either in one of our three offices or as area engineers in the Western Darling Downs, South West and Central Highlands local councils. This decentralised service enables us to select the best staff for your project and tailor our services for your requirements, each and every time. 

Our company philosophy centres on community and communication, regularly interacting with our clients while maintaining our commitment to local availability and accessible management. Our focus is not on doing the same thing for many clients, but rather being able to do many different things for the same clients. We leverage our experiences, technical and community knowledge to achieve the best outcome for your business.

Brandon & Associates – personal, professional, practical.



Mr C M (Gerry) Calder establishes an engineering firm based in Chinchilla, working as the sole-practitioner. A man of many talents, Gerry Calder held a Master of Engineering, was an Authorised Surveyor and also acted as a Barrister of the Supreme Court of Queensland. Proudly he also undertook the survey for the Queensland and Brisbane River landmark, the Story Bridge.


Mr Graham Brandon commenced as a Partner in the firm that was renamed ‘Calder & Brandon’. Following the death of Mr Calder in a car accident in March 1975, the total staff consisted of Mr Brandon and Company Secretary John McQuaid.


The firm was renamed ‘GJ Brandon & Associates’ and continued to trade under this name until it was changed to ‘Brandon & Associates’ in 2000.


Landmark year for our Roma office, after many years based in the Roma Town Council offices, Brandon & Associates established a permanent engineering office in Roma.


Brandon & Associates expand to Toowoomba to develop into new markets and improve our ability to service existing clients locally. In 2005, the Toowoomba office relocated to current premises due to growth and our ongoing success as a business.


From humble beginnings with only one staff member, Brandon & Associates now employs over 40 people across the Darling Downs/South-West regions and Central Queensland.

Brandon & Associates has also built on its initial client base of four regional shires (Chinchilla, Murilla, Taroom and Bendemere) and has since established long term relationships with many Councils in South-West and Central Queensland

Today, we provide professional services to various private enterprises, not for profit organisations and many local governments throughout south west central and western queensland including Western Downs Regional Council, Maranoa Regional Council, South Burnett Regional Council, Southern Downs Regional Council, Bulloo Shire Council, Paroo, Central Highlands Regional Council, Quilpie Shire Regional Council, Murweh Shire Regional Council and the Toowoomba Regional Council among others. 


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