A CSO, or chief security officer, manages security risks for an organization, from cyber attacks to physical intrusion, with the balance of these two functions depending on the organization. In terms of, the job involves protecting hardware, software, networks and data. Physical security, meanwhile, includes control over access to corporate sites and surveillance, along with liaison with law enforcement and external business partners.
Having said that, in many organizations nowadays a CSO focuses entirely on cybersecurity threats, making the two job titles interchangeable to a certain extent. It's also worth noting that these days there is an element of overlap between cybersecurity and physical security, thanks to the widespread use of electronic devices for site access and the proliferation ofdevices in industrial settings.