Senior Infrastructure, Security Specialist (Contract)

ARGYLL SCOTT CONSULTING PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

ARGYLL SCOTT CONSULTING PTE. LTD. is seeking a Senior Infrastructure, Security Specialist for a 12‑month contract in Singapore. You will blend hands‑on infrastructure operations with cloud security, incident response, and vendor coordination, supporting a hybrid environment.

The role requires 5+ years in IT infrastructure and at least 3 years in security engineering/operations, with strong knowledge of Zero Trust, SIEM and enterprise firewalls.

Qualifications

• Degree in Information Technology or Engineering or equivalent professional experience.
• 5+ years in IT infrastructure, networks, security administration and/or cloud support.
• At least 3 years in infrastructure security or security engineering/operations.
• Experience in hybrid on‑premise and public cloud environments.
• Hands-on knowledge of enterprise networking and security tech including firewalls and Zero Trust.
• Experience with SIEM, vulnerability management and cloud security tools.
• Experience in at least one incident-response exercise or security audit.

Responsibilities

• Manage day‑to‑day network, cloud and workplace infrastructure operations while ensuring availability and security.
• Design and secure network infrastructure including firewalls, VPNs, IDS/IPS, and network segmentation.
• Administer Zero Trust and secure remote access for users and sites.
• Secure cloud environments with identity controls, encryption, logging, and hardening.
• Monitor alerts, investigate incidents and support timely resolution.
• Support vulnerability management, penetration testing, and compliance reviews.
• Develop incident‑response procedures and participate in security drills.
• Coordinate internal tech teams and external service providers; maintain docs.

Skills

IT Infrastructure

Network Security

Zero Trust

Cloud Security

SIEM

Vulnerability Management

Incident Response

Firewalls

M365

Vendor Management

Education

Degree in Information Technology or Engineering

Job description

Senior Infrastructure, Security Specialist (Contract)

Location: Singapore
Contract Type: 12 months contract (Extendable & Convertible)
Keywords: IT Infrastructure, Infrastructure Security, Network Security,Zero Trust, ZTNA, Cloud Security, SIEM, Vulnerability Management, IncidentResponse, Firewalls, M365, Vendor Management

Company /Role Overview

An established multinational organisation is seeking a Senior Infrastructure & Security Specialist to join its technology team. The position sits within alean internal technology function supported by external consultants and serviceproviders. The role combines hands-on infrastructure operations with networkand cloud security, cybersecurity initiatives, incident management and vendorcoordination. The successful candidate will be expected to take ownership of ahybrid on-premise and cloud environment while ensuring infrastructure remainssecure, resilient and operationally effective.

Key Responsibilities

• Manage and support day-to-day network, cloud and workplace infrastructure operations, maintaining system availability, performance and security.
• Design, maintain and secure network infrastructure, including enterprise firewalls, VPN connectivity, intrusion detection/prevention controls, network segmentation and wireless/network access infrastructure.
• Administer Zero Trust and secure remote-access solutions supporting users, branch locations, internet and SaaS connectivity, data-centre access and private applications.
• Secure cloud environments through appropriate identity and access controls, encryption, logging, monitoring and infrastructure hardening practices.
• Monitor infrastructure, network, cloud and security alerts; investigate incidents, perform root-cause analysis and support timely resolution of operational and security issues.
• Support cybersecurity initiatives including vulnerability management, penetration testing, infrastructure security assessments, compliance reviews, data-loss prevention and incident-response readiness.
• Develop and maintain incident-response procedures, participate in security exercises and contribute to broader infrastructure, cybersecurity and emerging-technology security planning.
• Coordinate internal technology, security and external service providers, tracking service levels, managing escalations and maintaining appropriate technical and operational documentation.

Job Requirements

• Degree in Information Technology, Engineering or a related discipline, or equivalent professional experience.
• Minimum 5 years of experience in IT infrastructure, covering areas such as systems, networks, security administration and/or cloud support.
• At least 3 years of hands-on experience in infrastructure security or security engineering/operations.
• Strong experience supporting hybrid environments spanning on-premise infrastructure and public cloud platforms.
• Hands-on knowledge across enterprise networking and security technologies, including switches, wireless access points, next-generation firewalls, advanced threat protection and Zero Trust network access.
• Practical experience with SIEM, vulnerability-management/scanning tools and cloud security technologies, together with exposure to identity management, encryption, logging and monitoring controls.
• Previous involvement in at least one incident-response exercise, infrastructure/security audit or penetration-testing engagement, with an understanding of vulnerability remediation and security compliance.
• Able to work independently, manage multiple priorities and take ownership of issues, with strong analytical, problem-solving, stakeholder-management and communication skills. Flexibility to occasionally support activities outside standard working hours may be required due to operational, vendor or time-zone requirements.