UK

United Kingdom · Technology and data · Mid-Level (2-5 years)

Network Security Administrator

Here is the whole job, in plain words. What it is, what you decide, how you're judged, how people get here and where they go next. Then the part no course gives you: twelve AI tutors who learn your work.

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  • Experience bandMid-Level (2-5 years)
  • Direct reportsNo direct reports
  • Reports toSenior Network Security Engineer
  • UK framework levelUsually someone starting out, or keeping a process running

Also advertised as Security Operations Analyst (Level 2) · Cyber Security Engineer (Junior/Mid) · Firewall Administrator · InfoSec Analyst

Built on 43,079 real UK job descriptions we analysed · grounded in qualifications employers recognise

Two short quizzes about you

1From this job to a course

The qualifications matched to this job

Qualifi Level 3 Diploma in Cyber Security Management and Operations Qualifi Ltd · Level 3 · covers 1 of 10 standards
Cambridge OCR Level 3 Cambridge Technical Introductory Diploma in IT Cambridge OCR · Level 3 · covers 1 of 10 standards
Cambridge OCR Level 3 Cambridge Technical Subsidiary Diploma in IT Cambridge OCR · Level 3 · covers 1 of 10 standards
Cambridge OCR Level 3 Cambridge Technical Extended Diploma in IT Cambridge OCR · Level 3 · covers 1 of 10 standards
Cambridge OCR Level 3 Cambridge Technical Certificate in IT Cambridge OCR · Level 3 · covers 1 of 10 standards
Qualifi Level 3 Extended Diploma in IT and Cyber Security Qualifi Ltd · Level 3 · covers 1 of 10 standards

Matched from the standards this job is measured against: a suggestion, not an official ruling.

The units you would start with

Investigations and Incident Response Qualifi Level 3 Diploma in Cyber Security Management and Operations
Networked systems security Cambridge OCR Level 3 Cambridge Technical Introductory Diploma in IT

The future skills this job leans on

Data Fluency turning numbers into a decision
Trust Fluency keeping the digital world safe
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Your Plan Illustration

Built for Network Security Administrator

2 units that map to this job, from the qualifications that cover it.

  1. Investigations and Incident Response Qualifi Ltd · covers 1 of 10 standards Level 3
  2. Networked systems security Cambridge OCR · covers 1 of 10 standards Level 3
These are the real units behind this job, in the order they rank for it. Nothing here is marked done, because this plan has not been started by anyone yet. Yours would fill in as you go.

2AI and this work

Will AI change your work as a Network Security Administrator?

Nobody can say exactly how. Here is what this job is being asked for next, and where to start.

The new skill this role is being asked for

  • Security Storytelling & Risk Communication
Why each one is rising

The future skills this job leans on

We'll only ever tell you what we can actually back up. No hype, no scare tactics.

What happens when you start

Next, a free account. We build your Network Security Administrator plan as you set up, starting with a Future Fluency module on using AI in your job. No card.

Your first Future Fluency module is free. After that, your AI tutor is £70 a month.

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3What this role really is

A network security administrator looks after firewalls, intrusion detection systems, and network traffic, watching for signs of trouble. The work involves checking network activity, spotting oddities, and keeping unauthorised access out.

4What you'd actually use

The tools this job runs on, and how well you'd need to know each one.

Next-Gen Firewalls (Palo Alto PAN-OS, Fortinet FortiGate, Cisco Firepower) Intermediate

Implementing pre-approved rule changes, troubleshooting basic connectivity issues through the firewall, and monitoring traffic logs for policy violations. You'll be in the GUI a lot.

SIEM & Log Management (Splunk, Elastic Stack (ELK), QRadar) Intermediate

Running pre-built queries and dashboards to investigate alerts, performing basic log searches to find specific events (e.g., failed logins, blocked IPs), and escalating complex findings.

IDS/IPS & Network Analysis (Snort/Suricata, Wireshark) Basic

Identifying alerts from IDS/IPS logs. Using Wireshark with guidance to capture and filter traffic for a specific issue, like a suspected malware connection.

Vulnerability Management (Tenable.sc/Nessus, Qualys, Rapid7 InsightVM) Intermediate

Configuring and running credentialed/uncredentialed scans. Interpreting scan reports and assigning remediation tickets based on pre-defined severity levels.

Endpoint Detection & Response (EDR) (CrowdStrike Falcon, SentinelOne, Microsoft Defender for Endpoint) Basic

Monitoring the EDR console for alerts, performing basic host containment actions (like network isolation), and collecting forensic data using pre-built scripts.

Cloud Security Posture (AWS Security Hub/GuardDuty, Prisma Cloud) Basic

Monitoring cloud security dashboards for high-severity alerts (e.g., public S3 buckets). Following runbooks to remediate common misconfigurations in our cloud environments.

5What you get to decide, and how that grows

Power in a job isn't your title. It's what you're allowed to decide. Here's how it grows as you move up.

The choiceComing in Where you are nowThe step above
Firewall Rule Changes Proposes changes, requires full review and approval by Senior Engineer. Independently implements pre-approved, routine changes after peer review. Escalates complex or high-risk changes for Senior Engineer approval. Designs and approves complex firewall policies. Defines the review process for junior team members. Can override or approve urgent changes with justification.
Security Incident Response (L1/L2) Identifies and escalates incidents, follows strict runbooks for initial containment steps. Independently investigates routine alerts, performs initial containment and eradication based on established playbooks. Escalates complex incidents or those requiring executive communication. Leads incident response for major incidents. Makes critical decisions on containment strategies, recovery plans, and communication during an active breach.
Tool Configuration & Tuning Monitors dashboards and reports on anomalies. Cannot modify tool configurations. Configures and tunes specific security tools (e.g., SIEM alerts, vulnerability scanner settings) within defined parameters. Proposes improvements to configurations. Architects and implements new tool deployments. Defines tuning strategies to reduce false positives and improve detection efficacy across the security stack.
Vendor Interaction No direct vendor interaction. Escalates support issues to supervisor. Opens support tickets with vendors for technical issues. Follows up on resolutions. Can participate in vendor calls with a senior team member. Leads technical discussions with vendors. Evaluates new features or products. Manages vendor relationships for specific security tools.

6How you'll be judged

The scoreboard, and what is not on it. The hard targets, how often each is actually looked at, and the quiet signals that never reach a dashboard.

Firewall Rule Implementation Accuracy
The percentage of firewall rule changes that are implemented correctly the first time, without requiring rework or causing unintended outages.
Target · 99.5%+

You've made 20 rule changes this month, and only one needed a tweak after deployment because of a typo. That's a 95% accuracy, so we'd look at why that one slipped through.

Mean Time to Acknowledge (MTTA) for Critical Alerts
How quickly you acknowledge and begin investigating high-priority security alerts from our SIEM or EDR systems.
Target · < 15 minutes

A critical alert for a potential ransomware attack came in at 09:00, and you were on it, isolating the host by 09:08. That's well within target, good job.

Vulnerability Scan Completion Rate
The percentage of scheduled vulnerability scans (e.g., Nessus scans) that are completed on time across our network segments.
Target · 98% of planned scans

We planned 50 network scans this quarter, and you managed to run 49 of them as scheduled, with one delayed due to a server outage. That's 98%.

Security Incident Remediation Time (L1/L2)
The average time it takes you to resolve and close out routine, low-to-medium severity security incidents you're assigned.
Target · < 2 hours

You handled 10 phishing reports this month, and the average time from receiving the report to blocking the sender and deleting the email was 1.5 hours. That's spot on.

Quality of Incident Documentation
How clearly and comprehensively you document security incidents, including steps taken, findings, and remediation actions.
  • Your incident reports are easy for others to understand, even if they weren't involved. They include clear timelines, relevant log snippets, and a concise summary of the issue and resolution. Colleagues can pick up your documentation and know exactly what happened and why.
Proactive Issue Identification
Your ability to spot potential security issues or misconfigurations before they become critical problems, rather than just reacting to alerts.
  • You flag an unusual traffic pattern in the firewall logs during a routine check, which turns out to be a misconfigured application trying to talk to the internet. You notice a default password still active on a new device during a health check. Basically, you're looking for trouble (in a good way).
Collaboration and Knowledge Sharing
How well you work with the wider IT team, sharing your security insights and helping others understand network security best practices.
  • You're the person the Network Ops team comes to when they have a weird connectivity issue they suspect might be security-related. You contribute to our internal knowledge base with useful troubleshooting guides. You don't hoard information, you share it.
Adherence to Security Policies
Your consistent application of our established security policies and procedures in all your network security activities.
  • You always follow the change management process for firewall rules, even for small tweaks. You ensure all new devices meet our baseline security configurations before they go live. You push back (politely, of course) when someone asks for a shortcut that would bypass a security control.

7Would you like it

Both sides. What people enjoy, and what grinds them down.

What people enjoy
Protecting the Organisation

You get a real kick out of closing a security gap, spotting a suspicious log entry, or successfully blocking a phishing attempt. Knowing you've kept the company safe is a genuine source of satisfaction.

You find an old, unused firewall rule that was too permissive and you get it removed. That's one less potential entry point for attackers, and you feel good about that.

Solving Complex Puzzles

You enjoy the challenge of digging through logs, tracing network traffic, and figuring out why a security alert fired (or didn't fire). It's like being a detective for the network.

An application isn't connecting to a database, and everyone thinks it's the firewall. You use Wireshark to prove it's actually a DNS issue, saving hours of pointless troubleshooting.

Continuous Learning and Skill Development

You're always keen to learn about new attack techniques, security tools, and how to better defend our systems. You see every incident or new vulnerability as a chance to grow your expertise.

After reading about a new type of malware, you spend some time in your lab environment trying to understand how it works and how our existing controls would (or wouldn't) detect it.

What frustrates people
  • The Firewall Blame Game: Always being the first suspect when anything network-related goes wrong.
  • Alert Fatigue: Sifting through hundreds of benign alerts to find the one real threat.
  • The 'Business Needs' Exception: Having to implement a risky security workaround because 'the business needs it'.
  • Legacy Nightmares: Being stuck securing ancient systems that can't be patched or properly updated.
  • The On-Call Pager: Knowing that any critical P1 security incident will probably happen at 2 AM on a bank holiday weekend.
  • The Thankless Job: When you do your job perfectly, nothing happens, and no one notices. You only get attention when something goes wrong.
What this role does not give you
  • A quiet, predictable 9-to-5 schedule – security incidents don't respect office hours.
  • Immediate recognition for preventing problems – success often means nothing happens.
  • Complete control over all security decisions – sometimes business needs override security best practices.
  • A role focused solely on building new things – a lot of it is maintaining and defending existing infrastructure.
  • An environment free from legacy technology – you'll definitely encounter old, creaky systems.

8Who you work with

This role directly impacts our organisation's ability to operate securely and maintain business continuity. Your work ensures that our network infrastructure is resilient against cyber-attacks, protecting sensitive data and intellectual property. A solid Network Security Administrator helps us avoid costly downtime, reputational damage, and regulatory penalties, which, frankly, nobody wants to deal with. You're a key part of keeping the lights on and the bad guys out.

Inside the business
  • Network Operations Team
  • Infrastructure Team
  • IT Service Desk
  • Application Development Teams
  • Internal Audit and Compliance
Outside the business
  • Security Vendors (e.g., Palo Alto, Splunk)
  • Managed Security Service Providers (MSSP)
  • External Auditors (occasionally)

9What you need before you start

Not a wish list. The things you would be expected to already have.

  • A solid grasp of networking fundamentals (TCP/IP, routing, switching, DNS) – you won't be taught this from scratch.
  • Some hands-on experience with at least one enterprise-grade firewall (e.g., Palo Alto, Fortinet) in a professional setting.
  • Experience investigating security alerts using a SIEM or log management platform.
  • Familiarity with vulnerability scanning tools and the concept of patching/remediation.
  • Basic understanding of common cyber security threats and attack methodologies.
  • Ability to follow detailed technical instructions and runbooks accurately.
  • A genuine curiosity about how things work and how they can be broken (and then fixed).

10What to practise next

Where the job is going, and what to do about it starting this week.

Advanced SIEM Querying & Alert Tuning

As our environment grows, the volume of logs and alerts will explode. You'll need to move beyond basic queries to write complex ones that correlate events across multiple sources, and then tune those alerts to reduce noise and false positives. This is driven by the sheer scale of data and the need to find the 'signal in the noise'.

Correlation rules across different log types · Regular expressions (Regex) for pattern matching · Baseline deviation detection · Optimising query performance

  • This week: Pick one recurring false positive alert in our SIEM and try to figure out why it's firing. Can you make it smarter?
  • This month: Spend an hour each week diving deeper into the SIEM's query language documentation. Try to write one new, more complex query.
  • Next quarter: Look for online tutorials or a short course specifically on advanced Splunk SPL or Elastic KQL (depending on what we use).
  • Month 3-6: Work with a Senior Engineer to tune an existing alert, focusing on reducing false positives without missing real threats.

Quick win: Set up a dashboard that tracks the number of alerts by type. This helps you identify which alerts are generating the most noise and need tuning.

Scripting for Automation (Python/PowerShell basics)

Many routine network security tasks, like pulling specific firewall logs, checking configurations, or even automating simple incident response steps, can be made much faster with scripting. This is about working smarter, not harder, and is driven by the need for efficiency and faster response times in a resource-constrained environment.

Basic syntax and data structures (variables, lists, dictionaries) · Interacting with APIs (Application Programming Interfaces) · Automating repetitive tasks · Error handling and logging in scripts

  • This week: Find one repetitive task you do daily or weekly. Think about how a simple script could automate it (even if you can't write it yet).
  • This month: Start an online Python or PowerShell basics course. Focus on network-related modules or cmdlets.
  • Next quarter: Try to write a very simple script to pull a specific piece of information from one of our security tools (e.g., list all firewall rules).
  • Month 3-6: Work with a Senior Engineer to get feedback on your scripts and learn best practices for security automation.

Quick win: Use ChatGPT or Claude to help you draft simple Python or PowerShell scripts for tasks like parsing log files or querying IP addresses. Just remember to validate the output!

11Staying current once you are in

What people here do to keep up
  • Regularly read industry blogs, security news sites (e.g., KrebsOnSecurity, The Hacker News), and threat intelligence reports to stay current.
  • Participate in online security communities or forums to learn from peers and share knowledge.
  • Set up a home lab environment to experiment with new security tools, practice configurations, and simulate attacks (ethically, of course).
  • Attend webinars or virtual conferences on network security topics.
  • Take advantage of any internal training programmes or vendor-specific courses we offer.

12The rising capability

The rising capability

Zavmo analysis

What's rising in its place

This is where the work is heading, and the higher pay with it. Get fluent here and the shift stops being a threat and starts being your edge.

Security Storytelling & Risk Communication

It's no longer enough to just find a vulnerability; you need to explain why it matters to the business. Leadership needs to understand the actual risk, not just the technical details. This is driven by increased board-level scrutiny on cyber risk and the need for security to be seen as a business enabler, not just a cost centre.

  • Translating technical jargon into business impact
  • Framing risk in terms of likelihood and impact
  • Audience-specific communication
  • Using data visualisation to convey risk

13What you’ll use

What you’ll use

Skills this role draws on

Technical

  • Incident Response Frameworks (NIST/SANS)
  • Defense in Depth Principles
  • Network Segmentation Concepts
  • TCP/IP & Basic Packet Analysis
  • Vulnerability Management Lifecycle (Basic)

14The pathway

The pathway

How you actually get there, here

How you become one varies far more by country than what one does. This is the UK route. Most people take one of these ways in; the right one depends on where you're starting from.

  1. 1

    IT Support / Helpdesk Specialist

    1-3 years

    Skills to master

    • Troubleshooting basic network connectivity, understanding user issues, exposure to Active Directory, and a foundational grasp of IT systems. You’d have seen a lot of 'layer 8' problems.

    You're ready to move on when

    • Consistently resolving network-related tickets efficiently.
    • Showing a keen interest in security aspects of IT support (e.g., phishing reports, malware alerts).
    • Proactively learning about firewalls or security tools in your own time.
    • Asking 'why' things are configured a certain way, not just 'how' to fix them.
  2. 2

    Junior Network Administrator / Network Operations Centre (NOC) Engineer

    1-2 years

    Skills to master

    • Deep understanding of network infrastructure (routers, switches), monitoring network performance, initial incident response for network outages, and basic firewall concepts.

    You're ready to move on when

    • Successfully managing and monitoring network devices.
    • Demonstrating strong troubleshooting skills for network issues.
    • Actively participating in network change management processes.
    • Expressing a desire to specialise in network security and take on more security-focused tasks.
  3. 3

    Associate Security Operations Analyst

    0-2 years

    Skills to master

    • Monitoring security dashboards, following runbooks for low-level alerts, basic log analysis, and understanding common threat types. This is often the direct feeder role.

    You're ready to move on when

    • Consistently meeting MTTA targets for alerts.
    • Producing high-quality initial incident reports.
    • Showing initiative in investigating alerts beyond the basic runbook.
    • Developing a strong understanding of network-specific security events and logs.

15Where this role leads

The long view: This work can lead to a lead security engineer role, focused on technical depth, or a principal security architect role, shaping security strategy across systems.

The ten Future Fluencies

Zavmo analysis

The credential is what you can do today. These are what keep you valuable.

A qualification proves you can do the job as it's defined today. These ten are what decide whether you're still the obvious person for it in five years. They're the capabilities employers are now writing into senior roles faster than people are learning them. Zavmo weaves them through whatever you study, so you come out with both: the credential and the fluency.

The highlighted ones are the Fluencies your role leans on hardest, from how Network Security Administrator is actually changing.

Where it leads

Roles this leads to

How you would learn this

One to one, on the work you already do

A tutor sets the task against your own job and marks the reasoning, at your pace. There is no cohort to fall behind.

A lesson from Investigations and Incident Response, worked against Network Security Administrator.

Investigations and Incident Response Level 3

Applied to your work in Network Security Administrator

The objective of this unit is to provide learners with a comprehensive understanding of incident response, including its core phases, tools, and processes. Learners will explore the creation of a Computer Emergency Response Team (CERT) and the role of Disaster Recovery (DR) and Business Continuity Management (BCM) in supporting cyber incident response.

How the thinking builds
  1. 1 Remember
  2. 2 Understand
  3. 3 Apply
  4. 4 Analyse
  5. 5 Evaluate
  6. 6 Create
An illustration of a Zavmo lesson, built from this role’s own route. The unit, its objective and every criterion above are the awarding body’s own words, not an example.

It is £70 a month, billed monthly. Your free first module is Future Fluency, and you can cancel any time.

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See Your Progress Grow Illustration
Network Security Administrator
  • Incident Response Frameworks (NIST/SANS)
  • Defense in Depth Principles
  • Network Segmentation Concepts
  • TCP/IP & Basic Packet Analysis
  • Vulnerability Management Lifecycle (Basic)
This is your Mind Palace on learn.zavmo.ai. Every skill above comes from this role's own record, not an example borrowed from another job. A node lights up when you evidence it, and what you build stays yours between jobs. That is the part a course cannot do.

16The detail, folded away

Everything else the record holds

The career branches in full, how AI is already showing up in the day-to-day, and the questions people ask about this job. Here when you want them, out of the way while you decide.

Where it leads next, rung by rung

Where it leads

The career path, and where it branches

Network Security Administrator is a start, not a ceiling. Each step below asks for new skills and hands back more autonomy.

  1. Senior Network Security Engineer (L3)

    3-5 years in current role

    From owning devices to leading incidents and mentoring others.

    • Designing and implementing complex security policies (e.g., App-ID, User-ID on NGFW).
    • Writing advanced SIEM queries and building custom dashboards/alerts.
    • Leading incident response from start to finish for medium-to-high severity events.
    • Performing deep packet inspection with Wireshark to identify malicious traffic patterns.
    • Proactively tuning security tools to reduce false positives and improve detection.
Working with AI on the job

Working with AI

Where AI is starting to help

Let's be real, a lot of network security work is about sifting through logs, triaging alerts, and drafting reports. It's essential, but it can be a massive time sink. What if you could get back 10-15 hours a week to focus on actual threat hunting or designing better defences? That's where AI comes in.

We're not talking about replacing you; we're talking about giving you a serious superpower. Imagine AI handling the grunt work, freeing you up to be the strategic, proactive security expert you want to be. Our internal AI Productivity Hub is packed with tools and guides to help you do just that. Here’s a sneak peek at how AI can transform your day-to-day as a Network Security Administrator:

Automated Alert Triage (SOAR)

Use an AI-powered Security Orchestration, Automation, and Response (SOAR) platform to automatically investigate common, low-level alerts. The AI can enrich alerts with threat intelligence, check for related activity across systems, and even close out obvious false positives. This means you only see the alerts that genuinely need your human brain, saving you hours of sifting through noise.

Anomaly Detection (UEBA)

Leverage User and Entity Behavior Analytics (UEBA) to spot subtle deviations from normal network and user activity. AI can pick up on a compromised account logging in at an unusual time, accessing strange files, or making connections it shouldn't. It flags threats that traditional, signature-based tools would completely miss, helping you discover threats much faster than before.

CVE & Threat Intel Summarisation

Instead of spending an hour every morning reading through endless threat intelligence feeds and newly published Common Vulnerabilities and Exposures (CVEs), use an AI assistant. It can quickly read and summarise the key points, highlighting which vulnerabilities are most relevant to our specific tech stack and what you need to prioritise. Get the gist in minutes, not hours.

Incident Report Generation

After you've contained and eradicated an incident, the last thing you want to do is spend hours writing a report. Feed the technical logs, timelines, and your notes into an AI model. It can generate a clear, concise first draft of the incident report for management, translating technical jargon into business-impact language. This saves you significant time and mental energy post-incident.

Common questions

Common questions

How do you become a Network Security Administrator?

Common routes in include IT Support / Helpdesk Specialist (1-3 years), Junior Network Administrator / Network Operations Centre (NOC) Engineer (1-2 years) and Associate Security Operations Analyst (0-2 years). Times vary with prior experience.

Where can a Network Security Administrator progress to?

This role can lead on to Senior Network Security Engineer (3-5 years in current role), depending on the skills you build.

What new skills matter most for a Network Security Administrator?

Increasingly, Security Storytelling & Risk Communication. These are the skills our record of this role lists as growing.

Free tools

Want a read on where you stand?

Three free tools, no account needed. Each one ends with a role, a level and a way in.

Read the Zavmo manifesto to understand how you will be taught Meet your tutors

Or try another one

17Where to go from here

Other roles at Level 2

Same depth of qualification, different job. Useful if the work appeals but this particular role does not.

 More jobs in technology and data

Stay in the field you know and move sideways rather than up.
If you leave this industry

The skills built in this role transfer to wider cyber security work. Roles such as security architect, incident response lead, and cloud security engineer draw on similar skills. Specialisms such as IoT security or industrial control system security are also open, given the ongoing demand for security professionals.

This role profile is © 2026 Growth Engineering Technologies Ltd. Built from UK occupational standards and regulated qualification data, and written for Zavmo.

You're not behind. You're right on time. The shift is only just beginning. Your role won't look the same in two years. Be the one who leads the change, not the one it happens to. Start my Network Security Administrator plan, free What happens next: a free account, then we build your plan as you set up. No card. Build your plan, see your roadmap and meet the twelve tutors matched to you. All free. When you're ready to start learning, it's £70 a month, billed monthly. Cancel any time and billing stops.