Background Understanding of hazardous alcohol drinking and insomnia among Australian ambulance personnel is limited. Australian ambulance organizations have strengthened their organizational human resource management (HRM) to promote their employees’ healthy lifestyles, health and well-being.

Aims To describe the prevalence of hazardous alcohol consumption and insomnia among Australian ambulance personnel and to explore their associations with the organizational HRM strength.

Methods This cross-sectional study was conducted on 492 ambulance personnel randomly selected from three Australian states. The Alcohol Use Disorders tool, The Insomnia Severity Index and the Perceived HRM System Strength instrument measured alcohol consumption, insomnia and HRM strength. Descriptive analyses, bivariate association analyses and general linear models were used for data analysis.

Results Twenty per cent of Australian ambulance personnel consumed alcohol at a hazardous level and 68% experienced clinically significant insomnia. There was no significant association between organizational HRM strength and ambulance personnel’s hazardous alcohol consumption. There was a significant association between organizational HRM strength (consensus) and ambulance personnel’s insomnia experience.

Conclusions Hazardous alcohol consumption and insomnia were concerns among Australian ambulance personnel. Even though strengthening the HRM system might reduce their experience of insomnia, simply strengthening the HRM system could not reduce their hazardous alcohol consumption.