The Graduate Diploma in Applied Science is a postgraduate qualification (AQF Level 8) that bridges foundational science knowledge with advanced, real-world applications across disciplines such as environmental science, biology, chemistry, physics, medical science, data science, and earth sciences. Designed for graduates who hold a bachelor's degree in a science or related field, the course allows students to either deepen their expertise in a chosen discipline or pivot into a new scientific specialisation. Programs are typically one year full-time (or two years part-time) and are offered across a range of Australian universities and providers. The qualification serves as an academic stepping stone for those who wish to progress to a Master of Applied Science or a higher degree by research, while simultaneously providing the practical, job-ready skills demanded by industry.

The course is designed for a diverse cohort: recent science graduates seeking specialisation, mid-career professionals wanting to pivot or upskill, and those from adjacent fields such as engineering, health, or agriculture looking to formalise their scientific credentials. Core content typically spans scientific methodology and research design, advanced laboratory and field techniques, data analysis and interpretation, and the application of science to real-world environmental, health, or technological challenges. Specialisations commonly available in Australia include environmental science, medical physics, biomedical science, food and fermentation science, forensic science, marine biology, and data science (applied).

Employers of graduates span government agencies such as the Department of Climate Change, Energy, the Environment and Water, state environmental protection authorities (EPAs), the CSIRO, and local councils; as well as private industry including environmental consultancies, pharmaceutical and biotechnology companies, mining and resources firms, food and beverage manufacturers, hospitals and medical research institutes, and science communication and education organisations. The breadth of employer types reflects the versatility of this qualification across the natural and physical sciences sector.

To be considered for entry into a Graduate Diploma in Applied Science in Australia, applicants are generally required to hold a recognised bachelor's degree (or higher qualification) in a cognate science discipline such as biology, chemistry, physics, environmental science, earth sciences, mathematics, health science, or a related field. Most Australian providers require applicants to have achieved a minimum weighted average mark (WAM) — commonly 60–65% (Credit average) in relevant undergraduate subjects, though this can vary by institution and specialisation. Some programs may consider applicants from engineering, agriculture, or health backgrounds where sufficient foundational science content was studied. In some cases, professional experience in a relevant scientific field can be considered alongside or in lieu of academic results, particularly for mature-age applicants.

For applicants from non-English-speaking backgrounds, English language proficiency must be demonstrated through an approved test such as IELTS, TOEFL iBT, or PTE Academic. Typical minimum requirements include an IELTS overall band score of 6.5 (with no sub-band below 6.0), though some programs — particularly those involving clinical or regulated scientific practice — may require higher scores (e.g., IELTS 7.0). Applicants who have completed prior tertiary study taught and assessed entirely in English from an approved country may be exempt from formal testing.

Some specialised programs — such as those in Medical Physics — require a background in specific disciplines (e.g., biomedical or medical electronics engineering, physics, or mathematics) and may have additional professional accreditation prerequisites. Applicants with relevant prior study at diploma or graduate certificate level in a cognate area may be eligible for advanced standing (credit transfer), reducing the overall duration of their studies. Meeting minimum entry requirements does not guarantee selection, as admission is competitive at many institutions.