Senior Specialist Network Security Engineer (Firewall)

Job Purpose:

• As a Senior Network Security Engineer (Firewall), you will work within a team responsible for secure, stable and compliant network-security services. The role remains strongly technical, with increased ownership for complex implementations, troubleshooting and operational quality.
• You will implement and operate firewall, VPN, SSL interception and network micro-segmentation services together with the team. Responsibilities include security policy implementation, lifecycle management, upgrades, infrastructure changes and resolution of complex incidents.
• You will provide technical guidance to engineers, contribute to technical reviews and help improve documentation, standards and operational procedures. The role does not include direct people-management responsibility.

Key Activities:

• Administration and operation of firewall, Site-to-Site VPN, Remote Access/SSL VPN and SSL Interception environments
• Evaluation, technical validation and configuration of firewall policy requests in accordance with security standards and least-privilege principles
• Handling of complex Requests, Incidents, Changes and Problems, including root-cause analysis and coordination of corrective actions
• Planning and implementation of firewall upgrades, lifecycle activities and infrastructure changes with appropriate testing, rollback and documentation
• Advising customers and application teams on secure connectivity, traffic flows and firewall rule design
• Setup and troubleshooting of traffic flows and segmentation policies using Guardicore or equivalent micro-segmentation technology.
• Setup, troubleshooting and maintenance of Site-to-Site VPN connections, including IPSec-related issues
• Performing packet-flow analysis and end-to-end troubleshooting across firewall, routing, proxy, DNS and application dependencies
• Supporting high-availability platforms and participating in service restoration for priority incidents when required
• Reviewing technical implementations and providing practical guidance to less-experienced engineers without formal line-management responsibility
• Communicating with internal departments, global network/security counterparts, external companies and vendors
• Coordinating software maintenance, upgrades and agent rollouts with vendors, server administrators and relevant stakeholders
• Contributing to continuous improvement, automation opportunities, operational controls and reduction of recurring incidents
• Ensuring company guidelines, internal requirements, security standards and change-management controls are followed
• Maintaining accurate technical documentation, operational procedures, knowledge articles and configuration records

Main Skills Requirement:

• Understanding Network Security principles and best practices
• Experience with tools for network-micro segmentation, policy-Settings to regulate traffic flows based on labels (preferred with Guardicore)
• Experience with firewall technology
• Network theory and services (TCP/IP, UDP/IP, 7 layers of OSI, DNS, DHCP)
• Experience running and supporting high availability infrastructure
• Experience in x86 Server Operating Systems, Windows and Linux (RHEL)
• Experience in Virtualization VMware
• Experience with Office 365, especially performing and analyzing pivots in Excel
• Experience working with IPSec/SSL

Alternative Skills Requirement:

• Experience with large network integration with Public Cloud (Azure and/or GCP)
• Packet capture analysis as required during incident resolution using various tools such as Wireshark, and network protocol analyzers
• Ability to demonstrate analytical end to end troubleshooting and problem-solving skills
• Experience in organizational tasks, such as Agent-Rollout in a large company with foreign branches.
• Basic knowledge in SIEM aspects and the corresponding tools such as ArcSight.
• Experience with SSL Interception technologies

Personal Skills:

• 6 to 8 years of hands-on experience in enterprise firewall or network-security operations
• Demonstrated experience handling complex incidents, infrastructure changes, upgrades and high-availability environments
• Strong analytical troubleshooting and stakeholder communication skills
• Ability to work independently, take technical ownership and provide guidance within the team
• Experience in a regulated, global or large-scale enterprise environment is an advantage

Formal Education:

• Bachelor’s degree in Information Technology, Computer Science, Network Engineering or a related discipline; equivalent relevant professional experience may be considered
• Relevant firewall or network-security certification is an advantage (for example, Fortinet, Cisco or equivalent)