What is a potential label for a firefighter who does not work collaboratively with others?

A firefighter who does not work collaboratively with others is accurately labeled as an outcast. This term refers to someone who is excluded from a group, often due to their inability or unwillingness to engage and cooperate with team members. In high-stakes environments like firefighting, collaboration is crucial for ensuring safety and effective operations. If a firefighter is not team-oriented, they can create challenges not only for themselves but also for their colleagues, leading to a lack of trust and reliance among team members. In contrast, terms like "team player," "respected leader," and "manager" all imply a degree of collaboration and support within a group, which does not fit the described behavior of the firefighter in question. Hence, "outcast" is the most suitable label for someone who isolates themselves from the team.