Freelance WAN engineers use their expertise in IT to interconnect network systems. They check WAN performance, capacity, security settings, and approvals. Typically, a WAN has at least two LAN’s and covers big geographical areas. Network flow maintenance is important for WAN engineers.
A degree in computer science, information science, or networking is desirable. Some of the mandatory certificates are CCNA (Cisco Certified Network Associate), CompTIA Network+, Juniper, Microsoft Certified Solutions Expert (MCSE), and Wireshark Certified Network Analyst (WCNA).