When a branch office loses its ERP connection, or a VPN tunnel stays up while large file transfers quietly hang, the call goes to a network engineer. This person designs and runs the switches, routers, firewalls and wireless that every other system depends on, and usually gets noticed only when something stops working. Much of the job today sits close to security too: segmenting traffic, writing firewall policy and keeping an accurate record of what talks to what.
Below you will find a network engineer job description ready to copy, with guidance on seniority, screening questions that expose shallow knowledge, the usual ad errors and how to choose a hiring model. We also mark where this role ends and network security, cloud or SOC work begins.
Network engineer job description template
Fill the brackets with your vendors and site count. Engineers read vendor names first, so keep them accurate and leave out anything you do not actually run.
About the role
[Company] is hiring a Network Engineer to design, run and secure our network across [number] sites and [data centre / cloud] environments. You will look after routing, switching, firewalls, VPNs and wireless on [Cisco / Fortinet / Palo Alto] equipment, and resolve the problems that other teams cannot. You will report to [manager title] and be based in [city], with [travel to sites, if any].
Responsibilities
- Configure and maintain LAN, WAN and data centre switching and routing, including VLANs, trunks and link aggregation.
- Run dynamic routing with OSPF internally and BGP towards service providers and [cloud connections].
- Deploy and operate SD-WAN across branches, including application policies and failover between links.
- Manage [Fortinet / Palo Alto] firewalls, with reviewed rule changes and regular clean-up of unused rules.
- Build and support site-to-site and remote access VPNs.
- Design network segmentation between users, servers, guests and sensitive systems.
- Maintain wireless coverage and load balancers for [offices / applications].
- Monitor links and devices, respond to alerts and investigate packet loss, latency and intermittent faults.
- Plan and carry out firmware upgrades and hardware replacements in agreed change windows, with rollback steps.
- Keep diagrams, IP address records and device configuration backups accurate.
Requirements
- [X] years of hands-on network engineering in an enterprise or service provider setting.
- Strong command of Layer 2 and Layer 3 fundamentals, including spanning tree, subnetting, NAT and routing behaviour.
- Working experience of OSPF and BGP in production.
- Configuration experience on Cisco routers and switches, or on equivalent platforms.
- Firewall administration on [Fortinet / Palo Alto], including policy, NAT and VPN.
- Skill with packet captures and structured troubleshooting.
- Willingness to work in change windows, with [on-call or night work details].
Nice to have
- CCNP or a similar professional-level certification.
- Experience with [Cisco / Fortinet] SD-WAN rollouts.
- Network automation using Python or Ansible.
- Knowledge of cloud networking on [AWS / Azure / Google Cloud].
What we offer
- [Pay details] with [allowances for shifts or travel].
- [Site-based / hybrid] arrangement at [location].
- [Lab access and certification support].
How the network engineer role changes by level
Junior or L1 network engineer
Early-career engineers handle tickets, monitor alerts, patch ports, add VLANs and follow escalation paths under guidance. A CCNA or equivalent lab practice is a useful signal here. The ad should focus on subnetting, basic switching and a willingness to learn change discipline.
Mid-level or L2 network engineer
This engineer owns changes end to end, including firewall rules, VPNs and routing adjustments, and solves faults that span several devices. Requirements should include OSPF and BGP in production, one firewall platform in depth and evidence of writing proper change plans.
Senior or L3 network engineer
Seniors design networks and take the hardest escalations. They plan SD-WAN migrations, data centre refreshes and segmentation programmes, set configuration standards and speak to carriers and vendors as equals. CCNP is common at this level, although practical depth should carry more weight.
Network architect
Where the work is mostly multi-year design, vendor selection and budget, with little hands-on change, you are hiring an architect. A post for this role should state the estate size and the decisions the person owns.
Network engineer skills that matter most, and how to check them
- Layer 2 and Layer 3 reasoning. Ask what happens, step by step, when a laptop on one VLAN reaches a server on another. Listen for ARP, the default gateway, routing and the return path, explained without notes.
- Routing protocols. Present a scenario: two OSPF neighbours are stuck in ExStart, or a BGP session keeps flapping. Experienced engineers suggest an MTU mismatch for the first, and will check timers, reachability and logs for the second.
- Firewall behaviour. Ask why traffic might fail through a stateful firewall when return packets take a different path. Understanding asymmetric routing and session tables separates firewall engineers from people who only add rules.
- Troubleshooting method. Ask about the VPN that passes small pings while file transfers stall. Good candidates go to MTU and MSS quickly, then explain how they would prove it with a capture.
- Change discipline. Ask to see a redacted change plan, or ask them to walk through one. Pre-checks, rollback steps and a post-change test should all be present.
A practical lab is very revealing. Give the candidate a virtual topology with a broken route and a mistaken firewall rule, then ask them to explain each command as they go. Keep certifications as supporting evidence and weigh the hands-on work first.
Common network engineer job description mistakes
- Blending network and security analyst work. Asking one person to run routing, triage SIEM alerts and also perform penetration tests leads to shallow coverage. Fix: keep firewall policy with the network engineer and write separate posts for SOC and VAPT work.
- Naming no vendors. A Cisco campus engineer and a Palo Alto firewall specialist have different strengths. Fix: list your actual platforms and mark which are essential.
- Omitting site and shift details. Change windows, branch visits and night work affect who applies. Fix: state them clearly, including how often travel is expected.
- Using a CCNP as a hard filter. It removes capable engineers and lets through people who have passed exams without running a production network. Fix: list it as preferred and test real configuration skills.
- Confusing network engineering with desktop support. Adding printers and laptop issues to the role sends strong candidates away. Fix: move those tasks to a service desk post.
Contract, contract-to-hire or permanent: which suits a network engineer
Contract engineers fit well-defined network projects, such as an SD-WAN rollout, a firewall migration from one vendor to another, a new office or a data centre move. Experience on that specific migration is worth paying for, because rule conversion and cutover planning are easy to get wrong. Ask for updated diagrams and configuration records at handover.
Contract-to-hire is useful for operational roles where you want to see change discipline over a period. One careless change during a live window shows you more than any interview, and a steady record gives you confidence to make an offer.
Permanent hiring suits the engineer who will own your network for the long term, since knowledge of your sites, carriers and old exceptions takes time to build. Zilo AI supports all three routes, and can hire network engineers in India on contract, contract-to-hire or permanent terms. Our cybersecurity hiring, including SOC analysts and penetration testers, sits on the IT talent page.
Frequently asked questions
What should a network engineer job description include?
List your vendors, the number of sites, your WAN approach, firewall platforms and any cloud connectivity. Add change window expectations, travel and on-call. Then describe the biggest current project so candidates can tell whether the role is mainly build or run.
What is the difference between a network engineer and a network security engineer?
A network engineer focuses on connectivity, performance and availability, while a network security engineer focuses on policy, inspection and segmentation. Many companies combine them because firewalls sit on both sides. If you do, say how the time splits.
How is a network engineer different from a SOC analyst?
The network engineer builds and changes the infrastructure. A SOC analyst monitors alerts from a SIEM, investigates suspicious activity and escalates incidents. They work together during a containment, for example when a firewall rule must isolate an affected segment.
Do network engineers need to know cloud networking?
Increasingly, yes. Most businesses connect offices to AWS, Azure or Google Cloud, so a working grasp of virtual networks and private links helps. Designing the whole cloud network, however, is closer to a cloud architect’s work.
Is a CCNP required for a network engineer?
No. It is a helpful sign for mid-level and senior roles, but it should support practical experience and never replace it. A short lab exercise will tell you more about day-to-day ability.
If you would rather have someone else run the search, Zilo AI can help. Tell our team about your sites, vendors and the network project you have coming up.