Hospital trauma teams consist of a diverse spectrum of health care professionals who work together to deliver quality care. Although the qualities of a well-performing trauma team are often believed to be self-evident, there is little objective information about the most desirable personal and professional characteristics associated with quality trauma care. The aim of this study was to determine the traits and characteristics deemed of greatest value for a trauma team leader and a trauma team member in the adult trauma care setting. Semistructured interviews were conducted with trauma team leaders and trauma team members at a tertiary Canadian trauma centre. Standard qualitative research methodology was used. Interviews were recorded, transcribed and analyzed via an inductive analysis approach. Thematic saturation was achieved after 5 interviews, and 6 further interviews were conducted to ensure that a breadth of trauma care disciplines were included. Six attributes were identified to be of greatest value for trauma team leaders: communication, role clarity, experience, anticipation, management and decisiveness. Four attributes were identified to be of greatest value for trauma team members: engagement, efficiency, experience and collaboration. We further characterized the language defining the ranking of performance for each of these attributes. Results of this qualitative study involving an experienced and diverse spectrum of trauma team practitioners provide insight into the characteristics that are critical to establishing a “good” trauma team. These findings can be used to inform future determinations of the quality of trauma teams, the education of trauma practitioners and continuing medical education training and assessment tools.