IT Infrastructue & Network Engineer

Posted Yesterday
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Pasir Gudang, Johor Bahru, Johor
In-Office
5-5 Annually
Senior level
Greentech • Chemical • Renewable Energy
A Leading Bio-Renewables Technology Platform
The Role
The IT Infrastructure & Network Engineer designs, implements, and maintains secure IT/OT systems, oversees network operations, manages ELV systems, and ensures compliance while optimizing performance.
Summary Generated by Built In

Position Overview

The Infrastructure & Network Engineer is responsible for designing, implementing, and maintaining secure, resilient IT, OT, and ELV (Extra Low Voltage) systems within the plant. This includes managing Layer 2/3 network operations, firewall administration, system monitoring, and ensuring reliable connectivity across IT/OT environments. The role also oversees ELV systems such as CCTV, access control, and structured cabling to ensure compliance and operational integrity.


Key Responsibilities

1. Network Infrastructure

  • Configure, deploy, and troubleshoot Layer 2/3 switches.
  • Administer firewalls, including security policies, NAT, VPN, and traffic inspection.
  • Design and manage network segmentation (VLANs, ACLs, routing, isolation).
  • Ensure network resilience through redundancy and failover strategies.
  • Optimize network performance and plan for capacity.
  • Support wired and wireless infrastructure, including enterprise Wi-Fi and authentication.

2. OT Network

  • Maintain secure connectivity for PLCs, SCADA, historians, and production servers.
  • Collaborate with OT teams and vendors to secure IT/OT data flows.
  • Monitor OT network performance and support incident response.
  • Implement secure remote access for contractors and vendors.

3. ELV Systems

  • Manage ELV systems (CCTV, access control, PA/intercom) and ensure IP integration.
  • Apply cybersecurity controls and coordinate with vendors for compliance.
  • Oversee maintenance, upgrades, and documentation of ELV systems.

4. Monitoring & Visibility

  • Administer monitoring tools (e.g., SolarWinds) for performance and alerts.
  • Develop dashboards and thresholds for early issue detection.
  • Conduct root-cause analysis for outages and connectivity issues.

5. Identity & Access Management

  • Manage Microsoft Entra ID for identity lifecycle, conditional access, and governance.
  • Enforce RBAC, MFA, and secure access policies.

6. Server & Virtualization

  • Administer virtualization platforms (VMware/Hyper-V), including provisioning, patching, and backups.
  • Coordinate with vendors for hardware and storage health.

7. Cloud Security

  • Enforce cloud security policies and troubleshoot hybrid connectivity issues.

8. Documentation & Compliance

  • Maintain accurate network and system documentation.
  • Ensure compliance with HSSE, ISO standards, and cybersecurity frameworks.
  • Support audits and assessments.

Job Requirements
  • Expertise in network design, deployment, and troubleshooting.
  • Hands-on experience with switches, firewalls, and ELV systems.
  • Knowledge of IT/OT architecture, industrial protocols, and security principles.
  • Familiarity with monitoring tools, Microsoft Entra ID, and virtualization platforms.
  • Understanding of VLANs, STP, OSPF, DHCP, DNS, and QoS.
  • Degree in IT, Networking, or Computer Engineering.
  • Minimum 5 years of experience in IT infrastructure/networking (industrial environment preferred).
  • Exposure to ELV projects; certifications (e.g., CCNP) are an advantage.
  • Strong analytical and troubleshooting ability.
  • Effective communication and coordination with cross-functional teams.
  • High responsibility and safety awareness in operational environments.

Top Skills

Cloud Security
Cybersecurity Frameworks
Firewalls
Hyper-V
Industrial Protocols
Layer 2/3 Switches
Microsoft Entra Id
Solaris
Vlans
VMware
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The Company
Hong Kong
311 Employees

What We Do

EcoCeres, Inc. (“EcoCeres”) is a biofuel and bioproducts platform that turns waste into wonders with strong R&D capability. The company includes businesses of Bio-Grease Utilization and Agricultural Waste Utilization.

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