YV-001

Yohel Velazquez

Network Administrator — 15+ Years of Enterprise Infrastructure

About

SPEC-00

I have over 15 years of extensive experience in networking infrastructure and ISP services. Currently, I work as a network specialist at Evertec INC, where I manage Next-Generation Firewalls and related projects.

Work Experience

Network Specialist / Evertec

2021 — Present

CURRENT ASSIGNMENT

  • Managed Next-Generation Firewalls (NGFWs): access control lists (ACLs), security policy implementation, web filtering, DNS filtering, application filtering, and other threat-prevention measures to ensure robust network protection.
  • Troubleshooting network issues: diagnosing and resolving network problems and outages, ensuring minimal disruption to network services and maintaining optimal performance.
  • Security policy management for audits: generating and managing security policy reports to facilitate auditing processes and ensure compliance with regulatory requirements and organizational standards.
  • Auditing and enhancing network security policies: regularly reviewing and improving security policies to bolster network defenses, identifying vulnerabilities, and implementing necessary updates.
  • Support and troubleshooting of VPN services: site-to-site VPNs, SSL-VPNs, and related services, ensuring secure and reliable remote connectivity.
  • Firewall maintenance and patching: software updates and security patches on firewalls in line with scheduled maintenance windows.

Specialist Network Support / AT&T

2011 — 2021
  • Tier 2 support for Tier 1 engineers: advanced technical assistance across network, VoIP, security, and other services to resolve complex issues.
  • Layer 3 configuration in MPLS and BGP networks: set up and managed Layer 3 protocols within MPLS environments and BGP internet networks for efficient data routing.
  • Redundant router services and security configurations: configured routers for redundancy and virtual gateways, and implemented BGP configurations and security measures.
  • Router configuration for various services: customized router settings for customers using VoIP, MPLS, and Internet services for seamless connectivity.
  • Troubleshooting routers and VoIP services: diagnosed and resolved router-configuration and VoIP issues, maintaining network stability and performance.
  • Documentation and process maintenance: maintained accurate documentation of network configurations and processes for consistent operations and compliance.

Provisioning Engineer / Neptuno Networks

2011
  • Provisioned antenna WIMAX for Layer 2 transport (last mile).
  • Provisioned Layer 2 and Layer 3 circuits in an MPLS network.
  • Configured routers for customers using VoIP, data, Internet, and other services.
  • Configured MPLS routers and aggregation switches for network infrastructure expansion.
  • Supported NOC technicians on outage and trouble-ticket resolution.
  • Built and maintained a Visio documentation database of customer network designs.
  • Developed a network equipment configuration guide.

Network Operation Center / Evertec

2007 — 2011
  • Monitored transactions for credit-card, ATM, and POS systems.
  • Monitored communications across T1, ethernet, and fiber networks.
  • Assisted clients with host-to-host communications.
  • Provided 2nd-level support for customer issues with server-based applications.
  • Escalated hardware issues and failures to the appropriate on-call system administrator.
  • Coordinated with engineers, application owners, and outside support teams.
  • Monitored calls and email according to NOC procedures; initiated, tracked, and closed trouble tickets.
  • Maintained daily activity and incident logs, and reported outages affecting mission-critical applications.

Certifications

MANIFEST

Education

1 RECORD

Inter American University — Bayamón, PR
BBA in Computer Sciences for Installation and Repair of Computerized Systems and Networks· 2005–2007

Other Experience & Skills

Linux

M-01

Command-line administration across free, open operating systems.

command-line-interface · Linux-Administration · Troubleshooting · Debian · Ubuntu · Alpine

Proxmox VE

M-02

Virtualization platform for hyper-converged infrastructure.

KVM · LXC-containers · Virtualization · Virtual-Networks

Network Attached Storage

M-03

Networked storage serving data to a group of clients.

NFS · SMB · RAID · rsync · TrueNAS · OpenMediaVault · Synology

Docker

M-04

OS-level virtualization delivering software as containers.

Self-Hosting · OS-Level-Virtualization · Containers · Dockerfile · Docker-Compose · Volumes · Images

Overlay Network

M-05

Software-defined networking over encrypted internet tunnels.

Cloudflare · Secure-Access · Zero-Trust · Tailscale · ZeroTier · WireGuard · Encryption

Cloud Services

M-06

Internet-hosted compute, storage, and infrastructure.

Azure · AWS · Digital-Ocean · Linode · Networking · Redundancy · Availability · Monitoring · API