A Graduate Diploma in Petroleum Engineering is a postgraduate qualification, typically completed in one year of full-time study, designed to equip graduates from other engineering disciplines with specialised knowledge of the petroleum industry. The program provides comprehensive, multidisciplinary technical knowledge and understanding of the exploration, drilling, production, and operation of conventional and unconventional oil and gas resources. It bridges the gap between a general engineering background and the highly specialised skill set demanded by Australia's resources sector, making it ideal for chemical, mechanical, civil, or mining engineers looking to pivot into oil and gas careers. Graduates emerge ready to work in the upstream petroleum industry in Australia and internationally.

The course covers the full lifecycle of petroleum resource development — from reservoir characterisation and seismic interpretation through to drilling design, well completion, production optimisation, and surface facilities management. Students engage with contemporary topics including reservoir simulation, uncertainty modelling, carbon capture and storage (CCS), and the application of digital technologies such as AI and machine learning in reservoir management. The curriculum draws on strong industry–academia collaborations, with guest presenters, industry case studies, and access to real-world datasets commonly forming part of the learning experience.

Key employers of graduates include major oil and gas companies such as Santos, Woodside, Chevron, INPEX, Origin Energy, and Beach Energy, as well as oilfield service companies (Halliburton, SLB, Baker Hughes), engineering consultancies, and government agencies including state departments of energy and resources. Australia is one of the world's leading liquefied natural gas (LNG) exporters, meaning demand for petroleum engineering talent is consistently strong, particularly in Western Australia, Queensland, and the Northern Territory.

To be admitted to a Graduate Diploma in Petroleum Engineering, applicants typically need to hold a Bachelor of Engineering (Honours) or equivalent in a discipline other than petroleum engineering — such as chemical, mechanical, civil, or mining engineering — with a minimum GPA of approximately 4.0 out of 7.0 (or equivalent). This requirement reflects the fact that the program is designed specifically for engineers from other disciplines seeking to specialise, rather than those already holding an accredited petroleum engineering degree. Applicants with an Engineers Australia (EA) accredited degree in petroleum engineering are generally advised to pursue a Masters or research qualification instead. Some programs may also accept science graduates with strong mathematical and physical science backgrounds, assessed on a case-by-case basis.

For international students, English language proficiency is a standard requirement. Most Australian programs require a minimum IELTS overall score of 6.0–6.5 (with no individual band below 6.0), or equivalent scores from TOEFL (typically 90+), PTE Academic (64+), or Cambridge Advanced English (176+). Applicants who have completed recent studies in English at an accredited Australian institution may be exempt from this requirement. Some providers also consider relevant industry work experience as part of a holistic assessment, which can strengthen the application of candidates who may not meet the minimum GPA threshold. Professional references from engineering employers and a statement of purpose may also be required by some institutions.