How to get hired
Network engineering has a clear ladder, and most people climb it the same way: a NOC or support job, CCNA, real devices, CCNP, then design and security.
Where the first job comes from
- NOC engineer at a managed-services company or ISP. You monitor routers, switches, firewalls and links for many clients, open tickets when something goes red, run first checks, and escalate. Long shifts, but you learn faster than anywhere else.
- Network support engineer, L1. Handling user and branch connectivity issues for an enterprise, bank or hospital chain: a branch link down, a switch port dead, Wi-Fi access points not joining the controller.
- Telecom and ISP field roles. Fibre, last-mile and enterprise link installation for telecom operators and their vendors. ITI and diploma holders often start here and move to NOC roles.
- System integrators and Cisco partners. Companies that install networks for clients hire freshers with CCNA as implementation engineers: racking, cabling, basic configuration under a senior.
What the CCNA covers, and when it changes
The CCNA (exam 200-301) tests IP addressing and subnetting, switching and VLANs, OSPF, wireless, security basics, and automation basics. Cisco has published a revised CCNA blueprint for early 2027 under the same exam code, so check the exam topics version before you buy a study guide. Most employers treat a valid CCNA as the baseline for an L1 or L2 network role.
Certifications after CCNA
- CCNP Enterprise for L2 and L3 roles: deeper routing (OSPF, BGP, EIGRP), SD-WAN, wireless and automation.
- Firewall certifications for network security work. Palo Alto retired its PCNSA and PCNSE exams in 2025 and moved to new role-based certifications; Fortinet has its own Fortinet Certified Associate and Professional tracks. Ask which vendor your target employers run.
- Juniper JNCIA-Junos for ISP and data centre roles that use Juniper.
- CCIE is the senior credential, with a lab exam; it is a multi-year goal, not a starting point.
Lab practice
You can't learn routing from slides. Cisco Packet Tracer is free with a Cisco Networking Academy account and covers CCNA. GNS3 and EVE-NG run real device images for CCNP-level labs. Build a small office network (VLANs, inter-VLAN routing, DHCP, NAT, an ACL) and a two-site OSPF design, and be ready to describe them.
What interviews ask
- Subnetting on paper. "How many usable hosts in a /27? Split 192.168.10.0/24 into four subnets."
- Packet walk. "What happens when a PC pings a server in another VLAN?" ARP, the default gateway, routing, the return path.
- Switching. VLANs, trunking, STP and why a loop takes a network down, port security.
- Routing. OSPF neighbour states and areas, why a neighbour is stuck in EXSTART, BGP attributes and path selection (for L2 and above).
- Show commands and troubleshooting. "A branch can't reach the data centre. What do you check, in what order?"
- Firewalls and VPNs. Site-to-site IPsec phases, NAT, a rule that should work but doesn't.
First titles
NOC Engineer, Network Support Engineer, Network Engineer L1, Network Administrator, Implementation Engineer, Network Operations Analyst.
Change windows and night calls
Networks are changed when nobody is using them, so maintenance windows run late at night and on weekends. NOCs work 24x7 rotational shifts, and outages pull in whoever is on call. Ask about shift allowance and comp-offs.
Growth runs L1, L2, L3 or Senior Network Engineer, then Network Lead, Network Architect, or a move into network security, cloud networking or SD-WAN design. The biggest pay jumps come with CCNP-level skills plus firewall experience, and with the move from NOC monitoring to an engineering team that designs and changes networks.