Network Engineer – LAN/WAN (Senior / Level 3)
Role Overview
We are seeking an experienced Senior Network Engineer (LAN/WAN) to join our global infrastructure team. In this role, you will design, deploy, and maintain complex network environments while providing advanced Level 3 support for critical incidents. You will work closely with cross‑functional teams, vendors, and internal stakeholders to ensure high availability, security, and performance across enterprise network systems.
Key Responsibilities
* Design, develop, and deploy LAN/WAN network infrastructure across enterprise environments.
* Provide 3rd level troubleshooting for all LAN/WAN issues, alerts, and escalations.
* Maintain and support all network monitoring and reporting systems.
* Produce and maintain detailed technical documentation for all deployed systems and solutions.
* Participate in on‑call rotations and provide after‑hours support as required.
* Perform administrative tasks including time reporting and status updates.
* Configure and install a wide range of network components (routers, switches, firewalls, load balancers, VPN, QoS).
* Execute network maintenance, upgrades, patches, hotfixes, and security configurations.
* Monitor network performance, ensuring system availability, reliability, and capacity planning.
* Follow established change and configuration management processes for all network modifications.
* Work with the security team to implement security tools, policies, and best practices.
* Collaborate with vendors and internal IT teams to resolve complex issues.
* Deliver technical training to internal teams.
Technical Qualifications
* Strong networking background with CCNP certification (required).
* Excellent troubleshooting skills with the ability to quickly diagnose and repair network issues.
* Ability to communicate with customers, gather requirements, and collaborate with offshore teams.
* Experience with SD‑WAN (Silver Peak preferred).
* Experience with Next‑Gen Firewalls (Cisco Firepower preferred).
* Hands-on experience troubleshooting routing loops, asymmetric routing, and STP loop issues.
* Expertise configuring/troubleshooting:
* Cisco ASA, IPS
* Cisco ISE
* Cisco WLC (wireless)
* Routing protocols: EIGRP, OSPF, BGP
* LAN switching: VLAN, VTP, STP, EtherChannel
* Quality of Service (QoS)
* TCP/IP stack
* Application protocols: HTTP, HTTPS, FTP, SMTP, SNMP, SSL, etc.
* Network security: IPSec/SSL VPN, Cisco AnyConnect, AAA, TACACS+, RADIUS, 802.1x
* Experience with Cisco Catalyst and Nexus 7K/9K switches.
* Skilled in Cisco IOS and NX‑OS configuration and troubleshooting.
* Experience with application load balancers and firewall cloud services (Zscaler preferred).
* Data Center networking experience (Nexus / ACI preferred).
* Ability to support enterprise apps such as SAP, Citrix, Portal, etc.
* Ability to analyze monitoring outputs and recommend actions (e.g., CPU spikes on core devices).
* Cloud experience in AWS, GCP, or Azure is a plus.
* Hands-on experience with Citrix NetScaler, Cisco FTD, Aruba SD‑WAN, and Azure Cloud considered a strong advantage.
General Qualifications
* Strong team player with excellent collaboration skills.
* Ability to interact directly with end users to troubleshoot and resolve issues.
* Excellent documentation and reporting skills.
* Self‑starter with strong initiative and problem‑solving mindset.
* Exceptional communication and presentation abilities.
* Ability to learn new technologies quickly in a dynamic environment.
Education Requirements
* CCNP Certification (required)
* Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field.
* Advanced English.
Igualdade & Oportunidade para Todos
Representando 165 nacionalidades em todo o mundo, nos orgulhamos de ser um empregador que oferece igualdade de oportunidades, comprometido em fornecer oportunidades iguais de emprego a todos os candidatos e funcionários, independentemente de raça, religião, sexo, cor, idade, nacionalidade, gravidez, orientação sexual, deficiência física ou informações genéticas, ou qualquer outra classificação protegida, de acordo com as leis federais, estaduais e/ou locais.