Operations Network Security Engineer

Operations Network Security Engineer page is loaded## Operations Network Security Engineer locations:
Cilegon, Indonesiatime type:
Full time posted on:
Posted 2 Days Agotime left to apply:
End Date:
April 30, 2026 (30+ days left to apply) job requisition :
R-2610018

The Operations Network Security Engineer role will be involved in supporting and applying OT network assessment and design technologies, as well as BAU operations related to network infrastructure, network security, and backup and restoration activities.
This role also responsible for preparing design specifications and detailed technical documentation related to OT country projects.
** Responsibilities:
**** Operational & Infrastructure Management
*** Maintain and support
** OT network, firewall, and security systems
** to ensure high availability and performance for manufacturing operations.
* Administer and secure
** server, storage, and virtualization platforms** (VMware), including patching, snapshots, and RBAC controls.
* Perform
** system backup, restore, and disaster recovery testing
** for critical production systems.
* Collaborate with IT and operations teams to resolve L2/L3 incidents and perform root-cause analysis.
** Network & Security Engineering
*** Design and
** implement IT/OT network segmentation,
** VLAN structures, and secure architecture in line with corporate standards.
* Eliminate multihomed devices and enforce one-way data flow using firewalls, DMZs, or data diodes.
* Monitor and manage
** industrial firewall policies**, VPNs, and switch configurations for OT environments.
* Conduct
** vulnerability scanning, patching, and system hardening
** for servers, PLCs, and SCADA systems.
** Cybersecurity & Risk Management
*** Coordinate with corporate cybersecurity teams for
** threat detection, log correlation, and incident response.
*** Implement
** access control and password management
** for OT assets (servers, PLCs, SCADA, and engineering workstations).
* Contribute to
** OT risk monitoring
** by tracking critical controls, risk indicators, and remediation progress.
** Project & Digitalization Support
*** Participate in or lead
** digital and automation
** projects, ensuring network design and cybersecurity requirements are integrated.
* Support deployment of manufacturing systems and industrial IoT connectivity with secure network integration.
* Work with vendors and engineering teams during project commissioning, testing, and cutover activities.
** Documentation & Compliance
*** Maintain
** up-to-date network diagrams, configuration baselines, and change logs.
*** Support
** global OT security standards
** implementation, ensuring compliance with Blue Scope policies.
* Provide
** L2/L3 technical support,
** guidance, and training for plant maintenance and production teams.
** Qualification and/or experience required:**
* ** Bachelor’s degree
** in IT, Network Engineering, Computer Science, or Electrical Engineering.
* ** 3+ years**’ experience in
** network, security, or infrastructure roles** (industrial/manufacturing experience is a plus).
* Hands-on experience with:  +
** Cisco
* * network devices (routing, switching, VLANs, VPNs, firewalls).  +
** Windows Server
** and
** VMware/Hyper-V
** administration.  +
** System backup and restore
** processes (Veeam, Veritas, or equivalent).
* Understanding of
** network segmentation**,
** firewall rules**, and
** cybersecurity fundamentals**.
* Ability to perform
** troubleshooting, documentation, and coordination
** with multiple teams (IT, operations, vendors).
** Preferred Qualification and/or experience required:
*** Experience in
** OT or manufacturing environments
** with exposure to PLCs, SCADA, or industrial networks.
* Familiarity with
** IEC 62443
** or
** NIST
* * cybersecurity standards.
* Working knowledge of
** SIEM, log analysis,
** and
** incident response
** processes.
* Experience with
** network design, hardening
** baselines, and
** patch management
** for L2/L3 systems.
* Certifications such as
** CCNA,*
* ** CompTIA Security+**,
** Microsoft Certified Associate,
** or
** VMware Associate (VCTA/VCP).
*** Proactive mindset with strong
** problem-solving
** and
** continuous improvement
** attitude.

At NS…