Senior Field Service Engineer – Cybersecurity, Cheonan

About the role

ABB's Energy Industries division, within its Automation Business, is hiring a Senior Field Service Engineer for its cybersecurity solutions for Distributed Control System (DCS) environments, based in Cheonan, South Korea. The role reports to the Engineering Manager - Power & Water and involves onsite service work of medium to high complexity, delivered according to work instructions and ABB guidelines, with excellent customer service and identification of opportunities to improve system performance.

Key responsibilities

• Plan and execute service work according to customer orders and expectations, and communicate timelines and expectations to retain customers.
• Identify new service business opportunities with customers and other ABB teams.
• Coach technicians and engineers and supervise complex site activities.
• Design and specify integrated DCS cybersecurity solutions, including security architecture, frameworks and technology selection aligned with IEC 62443 and NIST.
• Implement and integrate systems such as WSUS, NAC, NAS, SIEM, firewall/UTM, including hardening, secure configuration and HMI upgrades.
• Manage patching strategies and secure access in OT environments, supporting vulnerability management and threat detection.
• Support end-to-end deployment, testing and commissioning, and prepare technical documentation and design artifacts.

Required profile

• Minimum 7 years of experience in DCS security engineering, cybersecurity or related industrial automation security roles.
• Proven experience in system integration, threat assessment, security architecture design, vendor management and DCS security hardening.
• Strong background in industrial cybersecurity standards (IEC 62443, NIST); experience designing security for power plants (e.g. KDHC) preferred.
• Business-level English (written and spoken) and fluency in Korean.
• Willingness to travel frequently to domestic sites (over 60%).

Required skills

• Hands-on experience with WSUS, NAC, NAS, SIEM, firewall/UTM and network security.
• Network security, access control, encryption, vulnerability management and incident response.