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Open nowPosted 14 hours ago

Senior Security Network Engineer

TMA

Where
Centurion, Gauteng, South Africa
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Your applicationOpen nowSenior Security Network EngineerTMA · Centurion, Gauteng, South Africa

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The clock on this job

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Share of postings closed within
  1. 2.2%1 day
  2. 4.5%3 days
  3. 12.7%7 days
  4. 20.4%14 days
  5. 35.6%30 days
  6. 58.7%60 days
This job: posted 14 hours ago

The posting

Purpose of the Role

The Senior Network Security Engineer (L3) is the highest tier of technical escalation within a SOCaaS network security function, responsible for the design, optimisation, and senior-level management of network firewall infrastructure and complex client network environments.

Operating on a rotational shift basis to support extended international timezone coverage, the incumbent leads incident response for high-severity network events, mentors L2 engineers, drives continuous improvement across network security tooling and processes, and serves as the primary technical authority for client network security engagements.

This is a hands-on senior role requiring both deep technical mastery and the leadership capability to maintain operational excellence across a 24/7 shift environment. You will be required to be available after hours when needed.

Requirements

Senior Network Security Operations & Incident Leadership

  • Lead the investigation, containment, and resolution of complex and high-severity network security incidents escalated from L2 during shift and on-call periods.
  • Lead network security projects.
  • Configure, optimise, and maintain network firewalls at an advanced level, including policy architecture, zone design, and threat prevention profiles.
  • Implement and manage next-generation firewall features, VPN architectures, and advanced network security policies across multi-client environments.
  • Conduct root cause analysis on network-related security incidents and produce structured post-incident reports with actionable remediation recommendations.
  • Familiarity with Azure environments will be advantageous.

Team Leadership & L2 Development

  • Provide technical leadership, guidance, and structured mentorship to L2 Network Security Engineers during shift operations and day-to-day work.
  • Review and quality-assure L2 escalation documentation, incident reports, and configuration changes before client communication or implementation.
  • Lead shift handovers, technical stand-ups, and post-incident reviews with clear, actionable outputs for the team.
  • Identify skills gaps within the network security team and recommend or deliver targeted development interventions.

Compliance, Documentation & Client Engagement

  • Maintain comprehensive, accurate documentation for network architecture, security policies, runbooks, and client-specific configurations.
  • Conduct security assessments, contribute to audit processes, and ensure client environments adhere to NIST, ISO 27001, and CIS standards.
  • Engage directly with client technical stakeholders on network security matters, providing credible, expert guidance and clear communication of risk and remediation.

Education & Certification

  • Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent demonstrated experience.
  • Palo Alto Networks PCNSE required; PCNSA as a minimum with active pursuit of PCNSE.
  • Additional networking certifications strongly advantageous: CCNP Security, CCNA, or equivalent senior-level qualification.

Experience

  • 5+ years of hands-on experience in network security or network engineering, with a minimum of 2 years at senior/L3 level.
  • Expert-level experience designing, configuring, and troubleshooting Palo Alto Networks firewalls (PA-Series, Panorama) in complex, multi-client production environments.
  • Proven experience leading network security incident response and conducting root cause analysis on high-severity events.
  • Demonstrated experience mentoring or providing technical leadership to junior or intermediate engineers in an operational environment.
  • Comfortable operating as the senior technical authority during extended or non-standard shift hours with full accountability for escalation decisions.

Technical Skills

  • Advanced knowledge of network protocols: TCP/IP, DNS, DHCP, VPN, BGP, OSPF, EIGRP, and SD-WAN concepts.
  • Proficiency with network monitoring and diagnostic tools: Wireshark, SolarWinds, SNMP, and equivalent platforms.
  • Cloud networking experience in AWS and/or Azure hybrid environments.
  • Scripting and automation capability: Python, Ansible, or equivalent for network operations and configuration management.
  • Familiarity with additional security appliance platforms advantageous: Cisco ASA, Fortinet.

Key Performance Indicators

  • SLA adherence and resolution quality for high-severity network incidents across shift coverage periods.
  • Client environment stability and reduction in repeat incidents through proactive architecture improvements and detection tuning.
  • L2 engineer development progress and reduction in unnecessary L3 escalations through effective mentorship.
  • Quality, accuracy, and completeness of technical documentation, post-incident reports, and client-facing communications.
  • Automation and process improvement contribution, measurable reduction in manual operational tasks across the network security function.
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