Network Security Engineer (Contract)

Company / Role Overview
This role sits within the regional production security function of a large, globally established financial services organization operating across Asia Pacific. The team is responsible for safeguarding critical production environments by designing, implementing, and operating enterprise-grade cybersecurity controls. The Network Security Consultant Engineer will focus on securing network infrastructure and applications, supporting both day-to-day operations and strategic security initiatives in a highly regulated, fast-paced environment, while collaborating closely with regional and global stakeholders.

Key Responsibilities

• Oversee and execute network security operations to ensure governance standards, controls, and procedures are consistently applied across production environments.
• Design, validate, implement, and document end-to-end network security workflows covering firewall management, segmentation, and zero-trust architectures.
• Provide technical consultation and troubleshooting support for internal stakeholders on firewall rules, network access, and security incidents.
• Deliver security components for regional and global projects, ensuring alignment with production security scope and timelines.
• Implement and maintain network segmentation and zero-trust solutions, including micro-segmentation policies for enhanced threat containment.
• Manage firewall configurations, rule changes, upgrades, and migrations, and support incident response activities when security events occur.
• Monitor and respond to web-based security threats, including zero-day vulnerabilities, policy updates, and risk assessments for business applications.
• Coordinate with external vendors for advanced technical support, solution enhancements, and new security implementations.

Job Requirements

Must-have:

• Bachelor’s degree in Computer Science, Information Security, or a related discipline.
• Minimum 5 years of hands-on experience in IT security, with strong specialization in network security.
• Solid understanding of network security fundamentals, zero-trust principles, and micro-segmentation concepts applied in real-world environments.
• Proven experience configuring and analyzing firewall rules, including enterprise-grade firewall management platforms.
• Hands-on exposure to web application security operations, including policy enforcement, signature updates, and incident analysis.
• Experience supporting production environments, managing security incidents, and collaborating with cross-functional operational teams.
• Strong written and verbal communication skills, with the ability to explain complex technical issues clearly to non-technical stakeholders.

Nice-to-have:

• Experience with micro-segmentation platforms and label-based policy implementations.
• Exposure to enterprise WAF and load-balancing technologies.
• Scripting or programming experience (e.g., Python or similar) to support automation and reporting initiatives.
• Relevant industry certifications in firewall technologies, network access control, web application security, or cybersecurity domains.
• Willingness to provide after-hours support for critical production security incidents when required.

If this role aligns with your experience and career goals, please send your application to AviralBhargava@argyllscott.sg.

Argyll Scott Asia is acting as an Employment Business in relation to this vacancy.