Anyone who has worked in the complex ecosystem of team-based trauma resuscitation can attest to the notion that effective teamwork is not intuitive, that a team of experts does not make an expert team and that to function as a cohesive inter-professional is a unique and specific skill set separate but not divorced from content or procedural knowledge. Exactly what that skill set looks like can be difficult to pinpoint: At any given time in a resuscitation, team members may be called upon to speak up, to keep quiet, to act, to remain hands off, to work together, to work independently, to work quickly or to slow things down. That the issue is complex does not mean that solutions have to be—in effect, good team behaviors can be scaffolded along a set of practical and tangible concepts, and then shaped by local, cultural and domain-specific understanding to create elite, high reliability, expert-level group performance.