This research investigates the structures, processes, and mechanisms that enable cross-professional coordination during periods of technological and institutional change, focusing on 911 emergency management organizations in the United States. It highlights the emergence of "truce structures" comprising truce roles and organizational forms, which help manage jurisdictional conflicts between professions like police officers and firefighters by introducing a truce profession—such as 911 Public Safety Telecommunicators—that mediates coordination. Additionally, the study reveals how these truce professionals navigate status-authority asymmetry and public digital scrutiny, impacting organizational accountability and coordination effectiveness.