Network Security Engineer - L1/1.5

ANOTECH ENERGY SINGAPORE PTE. LTD.; Singapore; On-site; SGD 50,000 - 70,000; Full time

Job summary

A global engineering consulting firm in Singapore is currently seeking a Network Security Engineer to provide L1 and L1.5 support for security alerts and assist in incident investigations. The role involves monitoring network infrastructure, performing troubleshooting, and implementing security measures. Candidates should have a diploma or degree in IT or related fields, with a minimum of 2 years of experience in network operations, and a willingness to work shifts. Key knowledge areas include firewalls, TCP/IP, and cybersecurity concepts.

Qualifications

• Minimum 2 years of experience in IT support, network operations, or infrastructure roles.
• Willingness to work in a shift-based or on-call environment.
• Good to have active certifications in CompTIA Network+/Security+, CCNA or any Cisco related certifications.

Responsibilities

• Monitor network and infrastructure systems for availability and security alerts.
• Perform first-level troubleshooting for network and server issues.
• Assist in applying security patches, updates, and configuration changes.

Skills

TCP/IP

DNS

DHCP

Firewalls

VPNs

Network segmentation

Windows/Linux operating systems

Active Directory

Cloud fundamentals

Malware

Phishing

Endpoint security

Access control

Log analysis

Packet analysis

Education

Diploma/Bachelor’s degree in Information Technology

Cybersecurity or related field

Tools

Fortinet

Palo Alto

Cisco

SIEM

Wireshark

Job description

ALTEN Group is a world leader in Engineering and Technology consulting services providing outsourced Engineering, R&D, and IT Services for different industries such as Transportation, Defence, Energy and Security with 55,000 engineers in nearly 35 countries. ANOTECH is the subsidiary of the Group delivering ALTEN's Engineering Services in Singapore.

As a Network Security Engineer, you will provide L1 or L1.5 support for security alerts, support incident investigations, and work closely with the team to protect enterprise network environments.

Responsibilities

Network & Infrastructure Support

• Monitor network and infrastructure systems (servers, firewalls, endpoints) for availability, performance, and security alerts
• Perform first-level troubleshooting for network, server, and connectivity issues
• Escalate incidents to Level 2 / Level 3 engineers with proper documentation and analysis

Security Operations (L1 / L1.5)

• Monitor security alerts from firewalls, endpoint protection, SIEM, and network tools
• Perform initial investigation of security incidents, anomalies, or suspicious activities
• Assist in applying security patches, updates, and configuration changes
• Support vulnerability scanning and basic remediation activities

System Administration Support

• Assist with user access management (AD, VPN, network access)
• Support backups, monitoring, and routine maintenance tasks
• Maintain accurate system and incident documentation

Process & Continuous Improvement

• Follow ITIL-aligned incident, problem, and change processes
• Contribute to knowledge base articles and SOPs
• Learn and adopt security best practices and new technologies

Requirements

• Diploma / Bachelor’s degree in Information Technology, Computer Science, Cybersecurity, or related field
• Minimum 2 years of experience in IT support, network operations, or infrastructure roles
• Willingness to work in a shift-based or on-call environment
• Fundamental knowledge of:
  • TCP/IP, DNS, DHCP, VLANs
  • Firewalls, VPNs, network segmentation
  • Windows/Linux operating systems
  • Active Directory
  • Cloud fundamentals (AWS, Azure, GCP)
• Familiarity with IT security concepts such as:
  • Malware, phishing, endpoint security
  • Access control and authentication
• Exposure to security or network tools such as:
  • Firewalls (Fortinet, Palo Alto, Cisco)
  • Endpoint security tools
  • SIEM or monitoring platforms
• Basic experience with log analysis or packet analysis (e.g. Wireshark)
• Familiarity with automation scripts or security playbooks
• Good to have active certifications in the following:
  • CompTIA Network+ / Security+
  • CCNA or any Cisco related certifications
  • Microsoft or cloud fundamentals