Network Engineer Operational Excellence
Resume:
Fort Woth, TX *****
*****.*******.*@*****.***
Colin Berrios
Professional Summary
Highly skilled Network Engineer with extensive experience in designing, configuring, and troubleshooting complex network infrastructures. Adept at ensuring optimal network performance, security, and reliability. Proven ability to manage high-priority changes, execute migrations, and implement network enhancements with minimal downtime. Strong collaboration and communication skills, with a focus on problem-solving and driving operational excellence. Committed to continuous professional development, staying current with the latest networking technologies and methodologies.
Core Competencies
•Network Configuration & Troubleshooting
•Load Balancing & WAP Management
•Site-to-Site VPN & IPsec/GRE Tunnels
•IP Prefix List & ACL Configuration
•Incident Management & Change Control (ITIL)
•Device Lockdown & Compliance
•Cross-Functional Team Collaboration
•Network Automation & Monitoring Tools
•ServiceNow, TCPWave, Cisco vManage, Cisco Prime
•HPNA & Net Info for Device Configuration
•Network Optimization & Performance Monitoring
•TACACS & AAA
•Spanning Tree Protocol (STP)
TECHNICAL SKILLS
Routing & Switching: Cisco IOS, Arista OS, Junos OS
•Network Protocols: OSPF, EIGRP, BGP, STP
•VPN & Security: IPsec, GRE, DMVPN, AAA, IPSec Tunnels, TACACS
•Monitoring & Automation Tools: ServiceNow, TCPWave, Cisco vManage, Cisco Prime, Spectrum Broadcom, Sedona, HPNA, Net Info
•Device Configuration: Router on Stick, VRF Configuration EXPERIENCE
Citi Bank, Irving,Texas (contract,Hybrid — Network Analyst May 2023 - November 2024
● Contributed to the NSS Change Implementation Team, executing over 589 network changes, including Load Balancing, Wireless Access Points (WAPs), Wireless Controllers, Routers, Switches, and P1 Bridges, ensuring minimal disruption and full alignment with business requirements.
● Led network migration efforts to optimize infrastructure, implementing secure, reliable, and scalable solutions with minimal downtime.
● Utilized industry-standard tools such as ServiceNow, TCPWave, Cisco vManage, Cisco Prime, Spectrum Broadcom, and Sedona for device monitoring, configuration, and troubleshooting, improving operational uptime and efficiency.
● Automated configurations and routine tasks using Sedona, reducing manual intervention and enhancing deployment accuracy.
● Applied IP Prefix Lists and ACLs to ensure secure, efficient routing and control over network traffic.
● Designed and deployed Crypto Mapping for site-to-site VPNs, ensuring secure communication across multiple locations.
● Conducted configuration backouts when necessary, ensuring zero impact on production systems during troubleshooting or failed changes.
● Managed ServiceNow incidents, coordinating with cross-functional teams to resolve critical network issues quickly and efficiently.
● Performed network traffic analysis to identify bottlenecks and optimize performance, improving overall user experience and operational efficiency.
● Implemented device lockdown policies to maintain compliance with security standards, ensuring proper access control across network devices.
● Used HPNA for device snapshots and Net Info for seamless deployment and integration of new devices into the network infrastructure.
● Leveraged TFTP servers to store and retrieve configuration files for SNMP-enabled devices, supporting provisioning and recovery processes.
● Assisted with the deployment of FlexConnect solutions to support remote locations, ensuring continued wireless service even during WAN outages. AT&T, Charlotte, NC (Contact, Hybrid)— Network Engineer November 2021 - November 2022
● Part of the MER Tier 2 Acceptance Team for AT&T Dark Fiber, managing over 800 dark fiber connections across the U.S. and ensuring their successful integration into client networks.
● Conducted OTDR testing for fiber connections to identify reflection or connectivity issues, coordinating with field teams for corrective actions.
● Managed RTs and COTs connectivity checks using AT&T DaFi Futsubishi application to verify and ensure seamless network connectivity for all clients.
United States Marine Corps, Various Locations (Hybrid)— Network Engineer
September 2017 - August 2021
● Configured and maintained Cisco routers and switches for VoIP and user services, ensuring high availability and reliability across the network for over 500 personnel.
● Troubleshoot access and trunk ports to support VLANs, ensuring secure and efficient communication for VoIP services and end-user devices.
● Managed EIGRP routing protocols to ensure dynamic neighbor relationships, enhancing the network’s flexibility and reliability.
● Enabled secure remote access to networking gear using SSH, resolving offsite issues and supporting global network operations.
● Configured and maintained VRF and DMVPN for dynamic routing, expanding network capabilities across multiple sites.
● Implemented AAA policies and SSH key management for enhanced device security and streamlined access control across the network.
● Deployed and maintained IPSec and GRE Tunnels, ensuring secure communication between remote sites.
EDUCATION
Ocean County Vocational Technical School — Computer Science (2 years) Graduated: 2017
Toms River High School North
High School Diploma
Graduated: 2017
Certifications
•CompTIA Network+ (Expired: October 2023)
•Cisco Certified Network Associate (CCNA) – Expired: October 2022 AWARDS
Eagle Scout
Corporal E-4 Marine Corps
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