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Professional profile / Luis Cisneros

Networks, systems, and the discipline to troubleshoot both.

Junior Network Engineer with more than five years of hands-on IT experience across network infrastructure, technical support, and precision electronics repair.

Tampa, FloridaContact Luis ↗

01 / Profile

I support and troubleshoot Cisco switching environments, firewalls, VPNs, and LAN/WAN connectivity. My foundation includes TCP/IP, DNS, DHCP, VLANs, NAT, routing, network segmentation, packet analysis, monitoring, and IDS/IPS security concepts. I approach infrastructure the same way I approach motherboard repair: isolate the fault, validate the path, document the change, and verify the complete system.

02 / Core skills

01

Cisco switches, routers, ACI, and APIC

02

Firewall configuration and troubleshooting with pfSense

03

Network security policies, NAT, and segmentation

04

Site-to-site and remote-access VPNs

05

TCP/IP, DNS, DHCP, VLANs, and LAN/WAN troubleshooting

06

Packet analysis, monitoring, and log analysis

07

Windows 10/11 endpoint deployment and support

08

Motherboard diagnostics and advanced microsoldering

03 / Professional experience

March 2023 to present

IT Support Specialist

Phone Repair & More LLC · Tampa, Florida

  • Support Cisco environments using ACI and APIC, including configuration validation, policy management, and connectivity troubleshooting across switching and fabric components.
  • Deploy Layer 2 and Layer 3 switches, wireless access points, and firewall appliances for secure connectivity across segmented environments.
  • Maintain firewall rules, NAT policies, VPNs, VLANs, and segmentation while using packet captures, monitoring, and IDS/IPS concepts to investigate anomalies.
  • Provide hands-on and remote support for more than 100 Windows devices each month, covering operating systems, applications, hardware, peripherals, and network incidents.
  • Document incidents, resolutions, configuration changes, assets, and device lifecycle events, and train users and junior technicians.
May 2020 to August 2021

Computer Repair Technician

Boss Electronics · Trinidad and Tobago

  • Diagnosed desktop and laptop hardware, operating-system, and connectivity failures for residential and small-business clients.
  • Configured routers and small LANs, resolved wired and wireless issues, and installed Windows systems and applications.
  • Performed system restoration and data recovery while protecting data integrity and minimizing downtime.
  • Documented repairs and explained findings and options clearly to nontechnical users.
March 2018 to March 2020

IT Consultant

ETECSA Telecommunications · Cuba

  • Supported telecommunications and network infrastructure, service availability, connectivity, and end-user access in production.
  • Troubleshot wired networks, voice and data communication, and service interruptions.
  • Trained users on communication systems, best practices, and basic troubleshooting while documenting incidents and resolutions.

04 / Education

Master of Science in Computer Science, in progress

University of Colorado Boulder

Boulder, Colorado

Bachelor of Arts in Liberal Studies, 2025

Thomas Edison State University

Summa Cum Laude · 4.0 GPA · President's List, September 2025

Doctor of Medicine Studies, 2015 to 2020

University of Medical Sciences

Camagüey, Cuba

05 / Certifications and training

Earned

CompTIA A+

Earned

CompTIA Network+

Earned

CompTIA Security+

Earned

Microsoft Azure Fundamentals, AZ-900

Earned

Google IT Support Professional Certificate

Earned

Cisco Network Support and Security

Earned

Cisco Introduction to Cybersecurity

Earned

Cisco Python Essentials 1

Earned

Advanced Microsoldering Certification

Exam pending

Cisco CCNA