An ArcSight SIEM job involves managing and configuring Micro Focus ArcSight, a Security Information and Event Management (SIEM) solution used for threat detection, compliance, and security monitoring. Professionals in this role handle log management, event correlation, and incident response to detect and mitigate cybersecurity threats. They also fine-tune security alerts, create custom rules, and integrate ArcSight with other security tools. Strong knowledge of cybersecurity concepts, log analysis, and scripting is often required.