"[1] Cannon is an associate professor of psychiatry at the Royal College of Surgeons in Ireland, as well as a consulting psychiatrist at Beaumont Hospital, Dublin.

Her group's discovery that more than one-fifth of Irish 11- to 13-year-olds have experienced "auditory hallucinations" (hearing voices) attracted significant media attention.

[5] She has expressed the desire that her findings will lessen the stigma around auditory hallucinations, and will help to "remove the boundary" between youth and adult psychiatric services and research.

She wrote a piece for the New Zealand Herald in support of the 'no' campaign titled 'Cannabis is harmful to young adults and teens' in which she claimed cannabis use is linked to a loss of IQ, unemployment, school drop-out and dependence on social welfare.

She appeared on Family First's official YouTube channel as part of their 'Say no to dope' campaign to discuss the harmful impacts of cannabis use in order to bolster support for a no vote on the referendum.

In 2014, Cannon was the only woman among eleven Irish researchers named to the Thomson Reuters "World's Most Influential Scientific Minds" report.