Network Security Infrastructure Engineer

St Engineering; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

ST Engineering is seeking a Network Security Infrastructure Engineer in Singapore to support and manage cybersecurity, endpoint security, server infrastructure, and network environments. You will oversee PAM, Windows Server, AD, and network administration, while ensuring security compliance and efficient operations.

The role emphasizes Active Directory, group policy, DNS/DHCP, and Power Automate automation, with a focus on incident handling, troubleshooting, and cross-team collaboration.

Qualifications

• Minimum 2 years of experience in IT Infrastructure, System Administration, or Cybersecurity roles.
• Hands-on experience with Privileged Access Management (PAM) solutions.
• Experience in Symantec Endpoint Protection deployment, administration, and troubleshooting.
• Knowledge of SecureAge security solutions and data protection technologies.
• Strong experience with Windows Server administration and Windows 11 support.
• Proficiency in Active Directory, Group Policy, DNS, DHCP, CA, and account management.
• Good understanding of network switching and routing, including VLANs, TCP/IP, and network troubleshooting.
• Experience in IT ticket handling and service management processes.
• Knowledge of Microsoft Power Automate for workflow automation.
• Familiarity with cybersecurity concepts, endpoint security, and access control management.

Responsibilities

• Administer and maintain PAM solutions to secure privileged accounts.
• Manage, configure, and support Symantec security products and endpoint protection.
• Administer SecureAge security solutions and data protection controls.
• Manage Windows Server, WSUS, and Windows 11 environments - deployment, patching, monitoring.
• Perform Active Directory administration, including user/group management and GPOs.
• Manage network infrastructure: switching, routing, VLANs, TCP/IP, troubleshooting.
• Handle IT security incidents, service requests, and tickets within SLAs.
• Monitor system and network performance and implement fixes.
• Develop automation workflows using Power Automate to improve efficiency.
• Implement security best practices and maintain documentation.

Skills

IT Infrastructure

Troubleshooting

Ticket handling

Cybersecurity basics

Tools

PAM

Symantec SEP

SecureAge

Windows Server

Windows 11

Active Directory

Group Policy

DNS

DHCP

CA

Power Automate

Job description

Job Title: Network Security Infrastructure Engineer

Req ID: 23108

Job Location Region: North East

About ST Engineering

ST Engineering is a global technology, defence, and engineering group with offices across Asia, Europe, the Middle East, and the U.S., serving customers in more than 100 countries. The Group uses technology and innovation to solve real-world problems and improve lives through its diverse portfolio of businesses across the aerospace, smart city, defence, and public security segments. Headquartered in Singapore, ST Engineering ranks among the largest companies listed on the Singapore Exchange.

Our history spans more than 50 years, and our strategy is underpinned by our core values – Integrity, Value Creation, Courage, Commitment and Compassion. These 5 core values guide every aspect of our business and are embedded in our ST Engineering culture – from the people we hire, to working with each other, to our partners and customers.

About our Line of Business – Mission Software & Services

Our Mission Software & Services business provides leading-edge mission critical command, control, and communications (C3) systems with secured IT infrastructure and managed services. We support our client’s innovation journey through design thinking, analytics, and AI-enabled decision support with our full suite of cloud computing solutions. We provide intelligent, actionable insights and sustainable solutions to our valued partners in diverse industries including defence, government, and commercial sectors.

Together, We Can Make A Significant Impact

We are seeking a proactive and technically skilled Network Security Infrastructure Engineer to support and manage our cybersecurity, endpoint security, server infrastructure, and network environment. The successful candidate will be responsible for Privileged Access Management (PAM), endpoint security solutions, Active Directory administration, Windows server management, network administration, and IT support operations. This role requires strong troubleshooting skills, security awareness, and the ability to manage multiple priorities effectively.

Be Part of Our Success

• Administer and maintain Privileged Access Management (PAM) solutions to ensure secure management of privileged accounts.
• Manage, configure, and support Symantec security products and related endpoint protection solutions.
• Administer and maintain SecureAge security solutions and data protection controls.
• Manage and support Windows Server, Windows WSUS and Windows 11 environments, including deployment, patching, monitoring, and troubleshooting.
• Perform Active Directory administration, including user account management, group policies, access controls, and security configurations.
• Manage network infrastructure, including switching, routing, VLAN configuration, and network troubleshooting.
• Handle IT security and infrastructure incidents, service requests, and support tickets within established SLAs.
• Monitor system and network performance, identify issues, and implement corrective actions.
• Develop and maintain automation workflows using Microsoft Power Automate to improve operational efficiency.
• Implement security best practices and ensure compliance with organizational security policies.
• Maintain technical documentation, configuration records, and operational procedures.
• Collaborate with internal teams and vendors to support infrastructure projects and security initiatives

Qualities We Value

• Minimum 2 years of experience in IT Infrastructure, System Administration, or Cybersecurity roles.
• Hands-on experience with Privileged Access Management (PAM) solutions.
• Experience in Symantec Endpoint Protection deployment, administration, and troubleshooting.
• Knowledge of SecureAge security solutions and data protection technologies.
• Strong experience with Windows Server administration and Windows 11 support.
• Proficiency in Active Directory, Group Policy, DNS, DHCP, CA, and account management.
• Good understanding of network switching and routing, including VLANs, TCP/IP, and network troubleshooting.
• Experience in IT ticket handling and service management processes.
• Knowledge of Microsoft Power Automate for workflow automation.
• Familiarity with cybersecurity concepts, endpoint security, and access control management.

Our Commitment That Goes Beyond the Norm

• An environment where you will be working on cutting-edge technologies and architectures.
• Safe space where diverse perspectives are valued, and everyone’s unique contributions are celebrated.
• Meaningful work and projects that make a difference in people’s lives.
• A fun, passionate and collaborative workplace.
• Competitive remuneration and comprehensive benefits.

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