Introduction: Personal protection in aerosol-generating procedures is an important skill to safely deliver care to patients in the COVID-19 pandemic. This aim of this study was to evaluate the impact of “just-in-time” simulation training for airway management in a suspected COVID-19 patient. Methods: This was a prospective mixed-method cohort study in a tertiary paediatric department. A mandatory “just-in-time” simulation training session for intubation of a suspected COVID-19 patient was conducted. Pre- and post-simulation questionnaires were administered. Participants were invited to attend focus group interviews to further delineate their experience. Quantitative and qualitative methods were employed to analyse the data. Results: Thirty-three participants, including doctors, nurses and respiratory therapists attended the training. Self-confidence in intubation, managing and leading a resuscitation team and dealing with problems with intubation significantly improved. Simulation was valued for the experiential learning as well as for increasing confidence and awareness. Process improvement suggestions from both participants and trainers were raised. There was a small signal of skill translation to real life scenarios. Conclusion: Simulation-based training is a useful tool for infectious disease outbreak preparedness. Further research will need to be done to determine the impact on actual clinical practice in pandemics.