Senior Data Communications Administrator

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Data Communications Administrator based in Brazil. This role offers the opportunity to provide senior-level technical leadership across complex enterprise network and communications environments. You will help design, implement, maintain, and optimize highly reliable connectivity across distributed LAN, MAN, and WAN infrastructures. The position combines hands-on network administration, advanced troubleshooting, security, monitoring, and modernization initiatives. You will work with technologies spanning routing, switching, wireless, firewalls, content filtering, and network monitoring platforms. A key focus will be maintaining secure, high-performance connectivity across geographically distributed and bandwidth-constrained environments. You will also contribute to technical documentation, incident resolution, infrastructure improvements, and knowledge sharing across technical teams. This is a strong opportunity for an experienced networking professional who thrives in complex environments and takes ownership of critical infrastructure. Provide advanced technical support for network planning, maintenance, implementation, and optimization across enterprise WAN environments. Install, configure, maintain, and troubleshoot network hardware including Cisco ISR, Nexus, Catalyst, ASA, and wireless controller platforms. Maintain the stability, availability, security, and performance of distributed LAN, MAN, and WAN environments. Support connectivity across diverse last-mile technologies, including satellite and other network service solutions. Configure and optimize routing, switching, wireless, firewall, and related network services. Support the deployment, administration, and optimization of network monitoring platforms such as Cisco Prime, Cisco DNA, ACS, ISE, and LiveAction. Maintain and support network security and content-filtering technologies, including Cisco Firepower, Palo Alto, Zscaler, and BlueCoat. Perform advanced troubleshooting, incident investigation, and root-cause analysis for complex network issues. Provide Tier 3 technical support for escalated incidents and critical connectivity problems across the enterprise. Mentor and provide technical guidance to regional technicians and other network support staff. Create and maintain accurate technical documentation covering network configurations, architecture, procedures, and troubleshooting processes. Contribute to network modernization, optimization, capacity planning, and continuous improvement initiatives. Produce incident resolution reports, performance assessments, security configurations, and recommendations for infrastructure improvements. Requirements Bachelor’s degree in Computer Science, Information Technology, Networking, or a related discipline is considered an asset. Proven experience configuring, deploying, administering, and supporting large-scale enterprise network environments. Strong hands-on experience with Cisco networking platforms, including ISR, Nexus, Catalyst, ASA, and wireless technologies. Solid knowledge of enterprise routing, switching, wireless networking, firewalls, WAN connectivity, and network security. Demonstrated experience supporting distributed LAN, MAN, and WAN environments, including geographically dispersed or bandwidth-constrained locations. Experience with network monitoring and management platforms such as Cisco Prime, Cisco DNA, ISE, ACS, and LiveAction. Experience supporting network security and content-filtering solutions such as Cisco Firepower, Palo Alto, Zscaler, and BlueCoat. Strong troubleshooting and root-cause analysis capabilities, with the ability to diagnose complex infrastructure issues under pressure. Ability to work independently, prioritize competing technical issues, and maintain service continuity in high-pressure environments. Strong organizational, documentation, analytica