The chief security officer (CSO) is responsible for an organization's entire security posture, both physical and digital. Originally, the CSO title referred to the head of IT security, but it now encompasses leadership of corporate security functions like physical security, safety, and assets. There is debate around combining all security under one role, as technology integrates into physical security tools and a holistic approach could lower costs, but CSOs face challenges overcoming organizational barriers. The CSO will oversee security efforts across multiple departments and groups to identify initiatives and standards.