Network Security Engineer

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🕒 March 19

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ISTARI

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2020

🔒 Cybersecurity

📚 Education

🤝 B2B

Cybersecurity • Education • B2B

ISTARI is a cyber resilience advisory, education, and innovation firm that helps critical organizations identify, manage, and recover from digital risk. It offers hands-on advisory services (including cloud, OT, supply chain, M&A cybersecurity, cyber crisis preparedness, and board governance programs), executive education through the ISTARI Academy in partnership with Cambridge Judge Business School, and curates/invests in a portfolio of cutting-edge cybersecurity companies. Part of Temasek, ISTARI works with enterprise clients globally to build durable, risk-based cyber resilience.

📋 Description

• Delivers Network Security architecture and engineering support for Zscaler ZIA/ZPA • Firewall policy management, and segmentation across on-prem, remote, and cloud environments • Administer Zscaler ZIA and ZPA environments, including policy configuration, rule tuning, and SSL inspection • Manage firewall and proxy rules across enterprise infrastructure, ensuring alignment with Zero Trust segmentation principles • Investigate anomalous network traffic and support SOC incident response by analysing packet flows, proxy logs, and threat intelligence • Collaborate with architects and SOC teams to integrate Zscaler telemetry into Microsoft Sentinel • Design secure connectivity patterns for on-prem, remote, and cloud users with policy-based routing and segmentation • Provide escalation support for complex network security incidents

🎯 Requirements

• Bachelor’s degree in science or engineering • 8-10 years of experience in Network Design & Architecture with in-depth knowledge of firewalls, VPNs, VLANs, DMZs, SD-WAN, SASE, and remote access technologies • Expertise in designing secure network topologies, network segmentation (micro and macro), Zero Trust models, and data center architecture • Strong knowledge of IT/OT Network Segmentation, Zero Trust, and industry standards for network security architecture and governance • Security certifications (e.g., CISSP, Cisco Network Security certifications like CCNP, CCIE) • Excellent architect skills with effective communication with ability to create client deliverables • Strong analytical skills to identify risks, develop design blueprints, and solve complex network security challenges