Tactical health involves providing field-based clinical support to law enforcement operations during frontline crisis interventions and prehospital emergency care. Health professional skill can inform individual officers’ occupational health maintenance and help agents of the state navigate primary and secondary trauma and posttrauma experiences in field- and clinic-based settings. Tactical health expertise can also inform department- and agency-level policies, decisions, and responses to community health and safety threats. Ethical questions considered in this issue focus on the nature and scope of health professionals’ collaborations with law enforcement personnel during and following critical event preparation and responses.