Senior IT & OT Infrastructure Specialist

Seatrium Ltd; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

Seatrium Ltd. is seeking an experienced OT security professional to design, implement, and manage security solutions for industrial environments in Singapore.

You will conduct risk assessments, define service offerings, and advise clients on best practices to improve security posture. You will collaborate with pre-sales and IT teams, maintain detailed documentation, and ensure system reliability across Windows servers, virtualization platforms, and network infrastructure.

Qualifications

• Bachelor’s degree in Cybersecurity, Information Technology, or related field.
• Certifications such as CISSP, GICSP, or IEC 62443 are advantageous.
• Minimum 3 years of OT security or network security experience in manufacturing/energy/utilities.

Responsibilities

• Designs, implements, and manages OT security solutions aligned with NIST, IEC 62443, and IACS UR 26/27.
• Conducts security assessments and audits of OT environments and recommends remediation.
• Develops OT Security as a Service offerings including packages, pricing, and delivery models.
• Engages customers with expert technical consultation on OT security best practices.
• Supports pre-sales activities with presentations, demos, and proposals.
• Maintains comprehensive security documentation and SOPs.
• Manages Windows servers, virtualization platforms (VMware/Hyper-V), and endpoints.
• Administers network infrastructure and performs segmentation, firewall management.
• Supports hybrid cloud deployments (AWS/Azure) across on‑prem, cloud, edge.
• Monitors systems, troubleshoots issues, ensures high availability and SLA-based resolution.
• Handles incident management and root-cause analysis.
• Collaborates with IT and other departments on projects.

Skills

OT security

NIST standards

IEC 62443

ICS/SCADA

Firewall config

Vulnerability scanning

Incident management

TCP/IP DNS DHCP

Windows Server

VMware/Hyper-V

Hybrid Cloud

Education

Bachelor's degree in Cybersecurity or related field

CISSP

GICSP

IEC 62443 certifications

Tools

VMware

Hyper-V

Firewall technologies

IDS/IPS

Vulnerability scanning tools

Job description

Designs, implements, and manages OT security solutions in compliance with NIST, IEC 62443, and IACS UR 26/27 standards.

Conducts security assessments and audits of OT environments to identify vulnerabilities and recommend remediation strategies.

Develops and establishes OT Security as a Service offerings, including service packages, pricing structures, and delivery models.

Engages customers and provides expert technical consultation on OT security best practices to enhance overall security posture.

Collaborates with internal teams to provide technical expertise during pre-sales activities, including presentations, demonstrations, and proposal development.

Creates and maintains comprehensive security documentation, including policies, procedures, and system configurations.

Manages and supports Windows servers, virtualization platforms (VMware / Hyper-V), and endpoint systems.

Administers network infrastructure, including switches, routers, firewalls, and network segmentation.

Supports hybrid cloud environments, including AWS and Azure, across on-premise, cloud, and edge deployments.

Monitors systems, troubleshoots technical issues, and ensures high availability and system reliability.

Handles incident management, performs root cause analysis, and ensures SLA-based resolution.

Maintains up-to-date technical documentation, including architecture diagrams, configurations, and SOPs.

Works closely with IT team members and other departments to support ongoing projects and initiatives.

Possesses a Bachelor's degree in Cybersecurity, Information Technology, or a related field.

Relevant professional certifications such as CISSP, GICSP, or IEC 62443 are an added advantage.

Minimum of 3 years of experience in Operational Technology (OT) security or network security, preferably in the manufacturing, energy, or utilities sectors.

Strong understanding of NIST, IEC 62443, and IACS UR 26/27 standards and guidelines.

Solid knowledge of industrial control systems (ICS) and SCADA systems.

In-depth understanding of OT security risks, vulnerabilities, and mitigation strategies.

Hands-on experience managing OT security technologies, including firewalls, IDS/IPS, and vulnerability scanning tools in industrial environments.

Strong knowledge of firewall technologies, configurations, and best practices.

Experience with risk management and compliance requirements in OT environments.

Proficiency in network protocols such as TCP/IP, DNS, and DHCP.

Experience with Windows Server and Windows operating systems.

Hands-on experience working with virtualization platforms such as VMware and Hyper-V.

Location

Pioneer Yard

50 Gul Road, Singapore 629351

(Islandwide transport provided)

WorkingHours

Monday - Thursday: 8:00am - 5.15pm

Friday: 8:00am - 4.30pm

We regret that only shortlisted candidates will be notified.

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