Grounded Theory (GT) is a research method that allows the researcher to make discoveries withouta priori knowledge, and allows an open mind not an empty head. The use of this method is also desirablefor serendipity to occur in the research process. This article therefore aims to chronologically presenthow serendipity has grown over time in the use of the GT method in a field of research focusing onhighly demanding conditions such as disaster management and military operations. We will discussa new concept, namely, reflexive serendipity, which encompasses the conditions required for makingdiscoveries in the interview analysis. These may be contextual aspects and the role of the researcher,which includes having an open mind and the necessary perseverance and discipline to be able tosucceed with GT and serendipity.