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Information Technology

Network and Security Engineer

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Network and Security Engineers design, implement, and maintain the infrastructure that keeps enterprise networks running and protected from threats. They are responsible for both the physical and logical layers of connectivity — routing, switching, firewalls, VPNs, and intrusion detection — and for the security policies that govern how data moves across them. This dual scope makes them one of the more technical and consistently in-demand roles in IT operations.

Role at a glance

Typical education
Bachelor's degree in CS, IT, or Network Engineering, or Associate degree with significant lab experience
Typical experience
1-8+ years (Entry to Senior)
Key certifications
CCNA/CCNP, CompTIA Security+, CISSP, AWS Certified Advanced Networking
Top employer types
Enterprise companies, MSPs, Cloud providers, Government contractors, Manufacturing, Healthcare
Growth outlook
32% growth for security analyst roles through 2032 (BLS)
AI impact (through 2030)
Augmentation — AI enhances threat detection and monitoring capabilities, but the increasing complexity of hybrid cloud and zero-trust architectures expands the need for human expertise in architecture and incident command.

Duties and responsibilities

  • Design and implement enterprise LAN/WAN topologies including routed and switched infrastructure across physical and virtual environments
  • Configure and manage next-generation firewalls (Palo Alto, Fortinet, Cisco ASA) including security policy, NAT, and application-layer inspection
  • Deploy and maintain VPN solutions — IPSec site-to-site, SSL/TLS remote access — for internal users and third-party partners
  • Monitor network and security events using SIEM platforms (Splunk, Microsoft Sentinel) and investigate anomalies or confirmed incidents
  • Perform vulnerability assessments using tools such as Nessus or Qualys; prioritize findings and track remediation with system owners
  • Manage network access control (NAC), 802.1X authentication, and endpoint segmentation to enforce least-privilege access policies
  • Support cloud network security in AWS, Azure, or GCP — security groups, VPC peering, transit gateways, and cloud-native WAF configurations
  • Respond to security incidents: contain affected systems, preserve forensic evidence, coordinate with SOC teams, and document timelines
  • Develop and maintain network diagrams, runbooks, firewall rule documentation, and change management records in accordance with audit requirements
  • Evaluate new security tools and network hardware through proof-of-concept testing, vendor review, and TCO analysis before recommending procurement

Overview

Network and Security Engineers sit at the intersection of two disciplines that have been converging for over a decade. They keep the organization's data moving — reliably, quickly, and within a security posture that satisfies both internal policy and external compliance requirements. At most companies, that means touching everything from physical switching in the data center to cloud security group configurations in AWS, often in the same week.

A typical week involves a mix of operational work and project work. On the operational side: reviewing firewall change requests, investigating a SIEM alert that turned out to be a misconfigured backup agent, updating VPN certificates ahead of expiration, and running a patch cycle on the perimeter devices. On the project side: standing up a new network segment for a recently acquired business unit, evaluating a new EDR platform against existing stack integrations, or designing the network architecture for a cloud migration.

The security half of the role has grown substantially in scope and urgency over the past five years. Ransomware, supply chain attacks, and cloud misconfigurations have all moved from theoretical concerns to operational realities at companies of every size. Network and Security Engineers are often first responders when something goes wrong — isolating affected VLANs, pulling packet captures, and coordinating with leadership while simultaneously trying to understand what happened and stop it from spreading.

Documentation is a consistent pain point in this role. Network environments accumulate technical debt fast — firewall rules that were added for a project three years ago and never reviewed, VLANs that nobody can explain, shadow IT devices that appeared on the switching fabric without a change ticket. Engineers who build the discipline to document as they go rather than planning to 'clean it up later' are the ones whose environments stay manageable under audit pressure.

The job requires comfort with ambiguity. Most real-world network security incidents don't arrive with a clear diagnosis. The engineer's value is in methodical troubleshooting — working through the OSI stack, checking the right logs in sequence, forming and testing hypotheses rather than escalating immediately or thrashing through random configuration changes.

Qualifications

Education:

  • Bachelor's degree in computer science, information systems, or network engineering (most common at enterprise employers)
  • Associate degree plus significant hands-on lab experience and strong certifications (viable path at MSPs and smaller companies)
  • Self-taught engineers with home lab backgrounds and a CCNP or equivalent are regularly hired; the certification validates knowledge the degree would otherwise signal

Certifications — in rough priority order:

  • CompTIA Security+ (entry-level security baseline; often required for government contractor roles)
  • Cisco CCNA → CCNP Enterprise or Security (networking depth; CCNP is the common bar for senior roles)
  • CISSP (senior security positions; requires 5 years of experience to hold)
  • Palo Alto PCNSE or Fortinet NSE 4/7 (platform-specific; valuable if the employer runs those firewalls)
  • AWS Certified Advanced Networking or Azure Network Engineer Associate (required in cloud-heavy shops)
  • CEH or OSCP for roles with penetration testing or red team responsibilities

Technical skills:

  • Routing protocols: OSPF, BGP, EIGRP — configuration and troubleshooting in multi-vendor environments
  • Switching: VLANs, STP/RSTP, LACP, port security, 802.1X
  • Firewalls and UTM: policy management, zone-based architecture, application identification, SSL inspection
  • Network security monitoring: Splunk, Microsoft Sentinel, Sumo Logic — SPL or KQL query proficiency
  • Endpoint and identity integration: CrowdStrike, Okta, Azure AD Conditional Access, CyberArk PAM
  • Cloud networking: VPC design, transit gateways, security groups, AWS Network Firewall, Azure Firewall
  • Network automation: Ansible for config management, Python (Netmiko/Nornir), Terraform for cloud infrastructure
  • Packet analysis: Wireshark, tcpdump — comfortable working through a capture to diagnose an application or security issue

Experience benchmarks:

  • Entry-level: 1–3 years in helpdesk, sysadmin, or NOC with clear progression toward network/security work
  • Mid-level: 4–7 years with hands-on ownership of firewall policy, VPN infrastructure, and network monitoring
  • Senior: 8+ years with architecture ownership, incident command experience, and cross-team project leadership

Career outlook

Network and Security Engineers are among the more consistently employed technical professionals in IT. The Bureau of Labor Statistics projects information security analyst roles growing around 32% through 2032, and networking roles remain foundational — every organization with an IT footprint needs someone who can keep the pipes working and secured.

The threat environment has been a persistent demand driver. Ransomware incidents cost businesses billions annually, regulatory frameworks like CMMC, HIPAA, and PCI DSS require demonstrable security controls, and cyber liability insurance carriers are increasingly requiring specific security architecture evidence before underwriting policies. That compliance and insurance pressure translates directly into headcount — companies are hiring engineers they previously treated as optional.

Cloud adoption has expanded rather than replaced the role. Hybrid environments — on-premises data centers connected to AWS or Azure workloads over Direct Connect or ExpressRoute — are now the norm rather than the exception, and the security surface area is larger and more complex than a purely on-premises network. Engineers who can work fluently in both environments are in shorter supply than those who specialize in only one.

The shift toward zero trust architecture is reshaping what the day-to-day work looks like. Traditional perimeter defense (firewall at the edge, trust everything inside) is being replaced by identity-verified, microsegmented access models. Engineers who understand how to implement zero trust using tools like Zscaler, Prisma Access, or Microsoft Entra are being hired to lead migrations at organizations where the transformation is still incomplete — which, in 2026, is most of them.

There is meaningful demand in sectors that don't always top the headlines: manufacturing (OT/IT convergence and industrial network security), healthcare (medical device security and EHR infrastructure), and state and local government (CISA-mandated security improvements). These sectors often pay less than finance or tech but offer strong job stability and less competitive hiring processes.

For engineers who invest in cloud networking credentials, develop scripting skills, and stay current with zero trust tooling, the 10-year demand picture is strong. The ceiling on total compensation — base plus bonus plus equity at tech companies or cleared-contractor premiums in defense — is meaningfully higher than it was five years ago, and that reflects real market scarcity.

Sample cover letter

Dear Hiring Manager,

I'm applying for the Network and Security Engineer position at [Company]. I've spent six years in network and security infrastructure roles, most recently as the lead network engineer at [Company] — a 2,000-seat manufacturer with a hybrid environment spanning three on-premises data centers and AWS workloads connected over Direct Connect.

The security side of that role expanded significantly after we experienced a phishing-initiated intrusion in 2023. I was part of the incident response team that contained it, and afterward I led the architecture work that followed: deploying Palo Alto NGFWs to replace aging ASA hardware, implementing 802.1X across the switching fabric using Cisco ISE, and building out a Splunk environment to give us visibility we hadn't had. None of that was in my original job description, but it's the work I found most valuable and want to do more of.

I hold CCNP Enterprise and CompTIA Security+ certifications and I'm currently studying for the Palo Alto PCNSE. On the automation side, I've written Python scripts using Netmiko for configuration audits and backup tasks across our 60-device switching and routing environment — the kind of work that used to take a full day manually now runs overnight and emails me a diff report.

What draws me to [Company] specifically is the scope of the cloud migration on your roadmap. I've done AWS VPC design and security group management at smaller scale, and I'm looking for an environment where that work is central rather than incidental.

I'd welcome the chance to discuss the role.

[Your Name]

Frequently asked questions

What certifications matter most for a Network and Security Engineer?
Cisco's CCNP (Enterprise or Security track) and CompTIA Security+ are the most commonly required credentials at the mid-level. For senior roles, CISSP is near-universal in enterprise and government environments. Cloud-specific certs — AWS Certified Advanced Networking, Azure Network Engineer Associate — are increasingly required or strongly preferred for hybrid and cloud-heavy shops.
Is this a combined role or two separate specializations?
It depends on organization size. At smaller companies, a single engineer owns both network infrastructure and security — the roles are merged by necessity. At large enterprises, networking and security are separate teams that collaborate closely; a 'Network and Security Engineer' title usually signals either a hybrid shop or a mid-market company expecting cross-functional depth. Job seekers should read the duty list carefully rather than relying on the title alone.
How is AI changing the day-to-day work of Network and Security Engineers?
AI-assisted SIEM correlation and network anomaly detection are reducing the time engineers spend manually reviewing logs, but they're generating more alerts that require human triage — the volume problem hasn't gone away, it's shifted. Network automation tools using intent-based networking (Cisco DNA Center, Juniper Apstra) are reducing manual config work on large switching fabrics. Engineers who treat automation as a career threat rather than a tool to learn are falling behind peers who can write Ansible playbooks and Python scripts to provision and audit infrastructure at scale.
Do Network and Security Engineers need programming skills?
Not at a software-developer level, but scripting proficiency is increasingly a real differentiator. Python is the dominant language for network automation (Netmiko, Nornir, NAPALM libraries), and familiarity with REST APIs matters for integrating security tools and cloud platforms. Engineers who can automate routine tasks — config backup, compliance checks, firewall rule audits — free themselves from toil and get assigned to higher-value work.
What is the career path beyond Network and Security Engineer?
The most common tracks are: senior or principal engineer (deeper technical ownership, architecture input), network architect (design authority, vendor strategy, infrastructure roadmap), or security-focused paths like security architect or SOC manager. Some engineers move into pre-sales engineering at vendors or into consulting, where client variety accelerates exposure. Leadership paths exist but typically require engineers to deliberately build management skills — they don't happen automatically from technical seniority.

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