Deanna Heer


“She really knows her stuff and is a terrifying opponent, in a good way.”

- Chambers and Partners (Crime) 2019

“Hardworking, thorough and with sound strategic instincts.”

- Legal 500 (Crime) 2019

“A fine prosecutor who is very good and very thorough.”

- Chambers and Partners (Health and Safety) 2019

"Her knowledge of the caselaw and regulation is highly impressive."

- Legal 500 (Health and Safety) 2019


Appointed Junior Treasury Counsel in 2015, Deanna is an experienced criminal barrister who is regularly instructed in the most serious cases. She frequently appears before the Court of Appeal and advises the Attorney General in respect of unduly lenient sentences.

For many years, Deanna has also specialised in health and safety law, for which she is an A List advocate. She also appears at inquests and before professional disciplinary tribunals.

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Homicide and serious violence

Organised crime


Health and Safety