How does OT/ICS cybersecurity differ from enterprise IT security, and what skills are critical for interviewers?

OT/ICS cybersecurity prioritizes availability and safety over confidentiality, a stark contrast to enterprise IT where data confidentiality is paramount. OT environments often use legacy, proprietary protocols and systems (e.g., Modbus, DNP3) that cannot tolerate frequent patching or reboots, making traditional IT security tools unsuitable. Interviewers assess understanding of these unique constraints, knowledge of industrial protocols, and familiarity with standards like ISA/IEC 62443. Experience with SCADA systems, PLCs, and network segmentation (e.g., Purdue Model) is highly valued. Bangalore employers like Wipro and Infosys are increasingly seeking candidates with this specialized knowledge for their critical infrastructure projects.