The preparedness of a hospital for mass-casualty incident and disaster response includes activities, programs and systems developed and implemented before the event. These measures are designed to provide the necessary medical care to victims of disasters, and to minimize the negative impact of individual events on medical services. Up until now, there has been no systematic survey in Poland concerning the readiness of hospitals, as well as medical personnel, to deal with mass-casualty incidents. Consequently, little is known about the knowledge, skills, and professional competences of healthcare workers. The objective of this pilot study was to start an exploration and to collect data on the competences of healthcare workers, in addition to assessing the preparedness of hospitals for mass-casualty incidents. Utilizing an anonymous survey of a random sample, 134 healthcare providers were asked to respond to questions about the competencies they needed, and hospital preparedness during disaster response. It turned out that the test subjects evaluate their own preparedness for mass-casualty incidents and disasters better than the preparedness of their current place of work. The pilot study demonstrated that a properly designed questionnaire can be used to assess the relationship between hospital and staff preparedness and disaster response efficiency. Evaluation of the preparedness and effectiveness of disaster response is a means of finding and removing possible gaps and weaknesses in the functioning and effective management of a hospital during mass-casualty incidents.