Over the past 30 years, he has made internationally recognised contributions to the field of molecular biology about microorganisms that can be used in biomining practices. He has been evaluated as an A-rated scientist by the National Research Foundation since 1992. It is the highest ranking that a South African scientist can receive, and recognises the person as an international leader in his or her specific field. In 2011 he was also rewarded the SASM Gold Medal for exceptional service to Microbiology over an extended period of time.

We asked Prof Rawlings some key questions about his career as a microbiologist.