Roberto Castro Ortiz

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Hardware Engineer / Cisco Hardware Department

Nov 2016 – Jan 2018

Started as a part-time Hardware Engineer while completing CCNA training. After two months, promoted to full-time due to strong technical performance. Focused on hardware troubleshooting, diagnostics, and system testing.

Later promoted to Team Lead, managing a team of 30 engineers, coordinating workflows, mentoring junior staff, and improving process efficiency.

Key Contributions:

• Led a team of 30 engineers.
• Reduced hardware failure rate by 85%.
• Standardized testing procedures and improved team onboarding.

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Routing Engineer / Cisco Routing Protocols Team

Jan 2018 – Apr 2019

Worked as a TAC Engineer specializing in Layer 3 routing protocols including OSPF, BGP, EIGRP, and static routing. Provided advanced troubleshooting and configuration support for global customers using Cisco routers and multilayer switches.

Key Responsibilities:

• Diagnosed protocol and connectivity issues across large networks.
• Provided configuration assistance for ISR/ASR routers and Catalyst switches.
• Created internal documentation and contributed to the knowledge base.

Technologies: OSPF, BGP, EIGRP, RIP, Static Routes, IOS, IOS-XE, Wireshark, NetFlow

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Switching Engineer / Cisco Switching Team

Apr 2019 – Oct 2024

Transitioned into a Switching Engineer role following team restructuring. Specialized in enterprise Layer 2/3 switching, working with technologies like VLANs, STP, ACLs, and DHCP. Supported customers with configuration, troubleshooting, and performance optimization.

Key Responsibilities:

• Resolved VLAN misconfigurations, loops, and broadcast issues.
• Supported Cisco Catalyst series (2960–9300) and core switches.
• Delivered upgrade guidance and collaborated with global engineering teams.

Technologies: STP, VLANs, ACLs, DHCP, EtherChannel, Port Security, NetFlow

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Wireless Engineer / Cisco Wireless Team

Oct 2024 – Present

Requested transfer to the Wireless Team to expand technical expertise. Currently supporting Cisco wireless infrastructure including WLCs, access points, and enterprise wireless features.

Key Responsibilities:

• Troubleshoot connectivity, roaming, and performance issues.
• Configure AAA security, FlexConnect, and voice over WLAN.
• Perform spectrum analysis and assist in RF design planning.

Technologies: Cisco 5520 WLC, AireOS, FlexConnect, 802.1X, mDNS, Rogue Detection, Mesh, Mobility Anchoring, DNA Center, Prime, Wireshark

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