Designs and automates LAN, WAN, data centre and cloud network architectures.
Entry
Senior
Coding
Medium
Key skills
What is a Network Engineer?
A Network Engineer designs, configures, operates and troubleshoots the networks that connect an organisation’s sites, users, servers and cloud. They work with routers, switches, firewalls, wireless controllers, VPN concentrators and increasingly SD-WAN and cloud networking. The role demands a deep understanding of TCP/IP, routing protocols, switching, security and performance — because when the network is down, everything is down. It is a foundational IT role that opens doors to network architecture, cloud networking, network security and operations leadership.
Career overview
The Network Engineer designs the paths data takes. Routing policies, redundancy, SD-WAN, data centre fabrics, cloud interconnections, segmentation for security. Automation with Python and Ansible has become a core part of the job rather than a bonus.
Main responsibilities
- Design LAN, WAN and interconnection architectures
- Configure switches, routers, VLANs and Wi-Fi
- Manage firewall rules, VPN and network segmentation
- Troubleshoot latency, packet loss and routing issues
- Describe infrastructure as code and version it
- Follow capacity, performance and resource usage
- Prepare and execute change requests in production
- Keep technical documentation up to date
- Mentor junior team members and review their work
- Coordinate with software vendors and third parties
Technical skills
Technologies
Education level
Education requirements vary depending on the company, country and experience. Professional experience, certifications and technical skills can sometimes compensate for formal education.
High School / Bac
Less common
Bac+2 (2-year degree)
Less common
Bac+3 (Bachelor)
Common entry point
Bac+5 (Master / Engineering)
Common entry point
Experience & coding level
Experience level
Coding level
Useful certifications
Certifications are never mandatory. They are one way among others to prove a skill.
- CCNP Enterprise
- AWS Advanced Networking
- Juniper JNCIS
Where can this career take you?
Multiple paths are possible. Click a role to open its profile.
Direct progression
Possible branches
Common trajectories
Where can you go next?
Realistic next career moves, with compatibility and a transition roadmap for each.
Overlap: 54% · Difficulty: Medium
Skills to learn: Terraform, Hybrid connectivity, Troubleshooting
View roadmapOverlap: 24% · Difficulty: Medium
Skills to learn: Firewalls (Fortinet/Palo Alto), VPN / ZTNA, IPS / IDS
View roadmapOverlap: 23% · Difficulty: Medium
Skills to learn: AWS / Azure / GCP, Terraform, Identity & access management
View roadmapOverlap: 33% · Difficulty: Easy
Skills to learn: LAN/WAN design, Firewall & segmentation, Troubleshooting
View roadmapWhere can you go from here?
A typical progression built from real career relationships. Click any role to open its profile.
Soft skills
- Rigour and attention to detail
- Big-picture thinking
- Problem solving
- Clear communication
- Autonomy
- Documentation writing
Common previous careers
Roles that frequently lead into this career.
Overlap: 56% · Difficulty: Medium
Skills to learn: SD-WAN, Cloud networking, Load balancing
View roadmapOverlap: 24% · Difficulty: Medium
Skills to learn: Routing (BGP/OSPF), Switching & data centre fabric, Network security
View roadmapOverlap: 59% · Difficulty: Medium
Skills to learn: SD-WAN, Cloud networking, Load balancing
View roadmapOverlap: 12% · Difficulty: Medium
Skills to learn: Routing (BGP/OSPF), Switching & data centre fabric, Network security
View roadmapOverlap: 48% · Difficulty: Medium
Skills to learn: Switching & data centre fabric, SD-WAN, Load balancing
View roadmapHow to become a Network Engineer
- 1
Master networking fundamentals
Learn the OSI model, TCP/IP, subnetting, DNS, DHCP and common ports. These fundamentals never change and underpin everything else you will do.
- 2
Learn routing and switching
Study routing protocols (OSPF, BGP), VLANs, trunking, spanning tree and switching concepts. Configure them on real or simulated equipment (GNS3, Packet Tracer, EVE-NG).
- 3
Add security and wireless
Learn firewall rules, NAT, VPN (IPsec, SSL), network segmentation and wireless (Wi-Fi standards, controllers, RF basics). Modern networks are security-first.
- 4
Earn a first certification
Cisco CCNA or Juniper JNCIA proves your fundamentals and is often a hiring requirement. Certifications are not a substitute for hands-on skill, but they open doors.
- 5
Grow toward architecture or cloud networking
Add SD-WAN, cloud networking (VPCs, transit gateways, Direct Connect/ExpressRoute) and network automation (Python, Ansible) to move toward Network Architect or Cloud Network Engineer.
Network Engineer compared with adjacent roles
How this role differs from neighbouring IT jobs.
Network Engineer vs Network Administrator
Network Engineer vs Network Architect
Network Engineer vs Cloud Network Engineer
Network Engineer vs Network Security Engineer
Frequently asked questions
What is a Network Engineer?
A Network Engineer designs, configures, operates and troubleshoots the networks that connect an organisation’s sites, users, servers and cloud. They work with routers, switches, firewalls, VPN, Wi-Fi and SD-WAN.
What does a Network Engineer do?
They design and configure network topology, implement routing and switching, manage firewalls and VPNs, operate wireless networks, troubleshoot connectivity and performance issues, and plan capacity and redundancy.
Which tools and certifications does a Network Engineer need?
Vendors include Cisco, Juniper, Fortinet, Palo Alto and Aruba. Tools: Wireshark, Nmap, SNMP monitoring. Key certifications: CCNA and CCNP (Cisco), JNCIA/JNCIS (Juniper), and Fortinet NSE.
How do I become a Network Engineer?
Master TCP/IP and subnetting, learn routing and switching on real or simulated equipment, add security and wireless, earn a CCNA, and practise troubleshooting. Common paths in are from network technician or network administrator roles.
What is the career progression of a Network Engineer?
The typical path is Network Engineer → Senior Network Engineer → Network Architect, with branches into Cloud Networking, Network Security or Network Operations Management. Each step adds design, automation and architecture skills.
Continue your career exploration
Keep moving: compare roles, follow a roadmap, read a guide or prepare for an interview.
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Network EngineerSenior Network Engineer
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