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Sr. Network Engineer | MSP Owner | Wi‑Fi Design (Ekahau) | Microsoft 365 | VoIP | CCTV I’m a Senior Network Engineer with 15+ years of hands‑on experience installing, configuring, monitoring, and troubleshooting network infrastructure across medical, financial, hospitality, retail, and airline environments. I bring a rare mix of deep technical skill, field experience, and calm, professional communication—especially during high‑pressure cutovers and outages. As the owner of Zorro Link LLC, I support multi‑site businesses across California with enterprise‑grade network engineering, structured cabling, Wi‑Fi design, Microsoft 365 email deployments, VoIP systems, and security camera installations. Core Strengths Network installation, configuration, and troubleshooting Wi‑Fi design & validation using Ekahau Microsoft 365 email setup, migration & administration VoIP deployment (3CX, PBX, SIP, CUCM) System migrations & integrations Reporting, documentation, and client communication Backup, failover, and continuity solutions Calm, patient problem‑solving during critical incidents Network Engineering & Infrastructure Set up and configured routers, switches, firewalls, servers, and workstations Assisted remote teams with successful corporate network cutovers Tested and activated LAN/WAN circuits, broadband, and fiber connections Installed and supported Cisco, HP, Dell, Fortinet, SonicWall, UniFi, Aruba, Juniper Performed structured cabling, cable management, and rack‑and‑stack deployments Wi‑Fi Design & Ekahau Ekahau heatmaps, predictive design, and onsite validation AP placement, RF optimization, and interference mitigation Indoor/outdoor Wi‑Fi for warehouses, hotels, restaurants, and offices Microsoft 365 & Email Services Microsoft 365 tenant setup, domain configuration, DNS, MX/SPF/DKIM/DMARC Email migrations (IMAP, Exchange, Google Workspace → M365) User provisioning, security policies, MFA, and device management VoIP & Telecom 3CX, PBX, SIP trunking, CUCM, and VoIP endpoint configuration Network readiness testing for voice quality VLANs, QoS, and call‑flow optimization CCTV & Security Systems 10+ years installing IP cameras, encoders, DVR/NVR systems, surge protection Running analog/digital cabling, conduit, and structured pathways Camera mounting, NVR setup, and remote monitoring configuration Additional Technical Experience POS installation, PIN pad upgrades, pairing/IP configuration Media player installs, AV setups (100”–120” laser projectors) Gateway controllers, sensor calibration, freezer/restaurant IoT systems Decommissioning outdated equipment and documenting new deployments

Current Certifications: * CCENT ( Cisco Certified Network Technician ) * CCNA (Cisco Certified Network Admin (Routing & Switching)) * CCNP (Cisco Certified Network Professional (Routing & Switching)) * CCNA-SECURITY (Cisco Certified Network Security Admin) * SECURITY+ CE (CompTIA Certified SECURITY) * CEH (Certified Ethical Hacker) I am a Sr. Network and Security Engineer (SME) with expertise in Cisco Network Engineering and Cyber Security Engineering with year of I.T. experience managing private and government enterprise networks and Cyber security Network environments for large and small businesses . I have over 18+ years total experience as a lead Sr. network engineering SME as my foundation , and 9 yrs experience in Cyber Network Security infrastructure , design, configurations, troubleshooting, Cyber threat hunting. Also upgrading enterprise networks and security infrastructures for private companies , government organizations , including large and small business Networks and information systems. These skills include SME experience in Cisco Routing and Switching, ASA Firewalls, Palo Alto, Pfsense , VPNs, F5 Load balancer, WLAN, VoIP, and Cyber Security tools and SIEMS and Network Scanning, Windows Server, and WiFi networks.

I earned my Cisco Certified Network Associate (CCNA) certification by completing extensive hands-on study and practice in networking fundamentals, routing and switching, IP addressing and subnetting, VLANs, trunking, Spanning Tree Protocol, EtherChannel, OSPF, NAT, DHCP, ACLs, IPv4 and IPv6, wireless networking, network security, and network automation. I used Cisco-focused labs, practice exams, and troubleshooting exercises to build practical skills in configuring, analyzing, and troubleshooting network environments. Through this preparation, I developed a strong understanding of how enterprise networks operate and how to identify and resolve common connectivity and configuration issues.

I modernize Cisco UC for mid-enterprise teams: CUCM 8–15 upgrades, Webex Calling migrations (Local Gateway/CUBE), dial-plan redesign, Unity & UCCX. 100% JSS, Top Rated, 90+ projects delivered with low-risk, zero-downtime cutovers. What you get • Webex Calling migrations (Local Gateway on CUBE, SRTP/TLS, E911/RedSky) • CUCM/Unity/UCCX upgrades & health checks (8.x→15.x) • CUBE/SBC setup for SIP trunks (TLS/SRTP, dial-plan/E.164) • Expressway MRA, Jabber → Webex app transitions, site cutovers Selected outcomes • 2,500-phone CUCM→Webex cutover, zero downtime, E911 verified • CUBE hardening + SIP normalization, eliminated 606/47 & one-way audio • CUCM, Unity Connection, UCCX upgrades with little to no down-time How I work 1. 30-min discovery + artifact review (config, call flows, carrier details) 2. Plan: risks, rollback, test matrix, success criteria 3. Implement in waves; validate CDR, media, and E911 Why me Top Rated, 100% JSS, 90+ Upwork jobs. 24+ yrs Cisco UC. CCNP Collaboration. Let’s start Send your current topology + target state. I’ll come back with the migration plan and a fixed-scope quote.

👑 Expert Vetted - Top 1% of talent on Upwork ⭐️ Top Rated - Highly rated for the work provided 🎯 100% Job Success Score 🕒 600+ hours on Upwork ✅ 30+ years of experience ✅ 50+ projects delivered here on Upwork With over three decades of experience under my belt as a network and security engineer, I've traversed the ever-evolving landscape of LAN/WAN network design, network security, firewalls, implementation, and maintenance. My expertise is not merely a testament to time, but also backed by credentials including Cisco CCNP (route/switch), a Cisco CCDP for network design, and a PCNSE for Palo Alto Networks. I am always available for consulting for short-term and long-term projects. Thank you.

Network engineer with 4+ years across enterprise deployment, DoD network operations, and carrier NOC environments. CCNA, CCNA Automation, CCNA Cybersecurity, JNCIA, and Security+ certified, with an active DoD Secret clearance. U.S. military veteran. What I can help you with: Network deployment & migration: Cisco Meraki, VMware VeloCloud SD-WAN, Juniper, and Ciena. Staging, configuration, cutover planning, and validation. I currently run refresh and deployment projects across 6,000+ locations worldwide and have taken site-wide wireless implementations from planning through cutover. Troubleshooting & incident response: enterprise LAN/WAN, wireless, VPN, and carrier backbone networks. SolarWinds monitoring, plus ServiceNow, Jira, and Remedy workflows. Automation & reporting: Python and PowerShell scripting to eliminate manual work. I built internal tooling that pulled data from disconnected network and asset systems into reporting used by executives to scope multi-site projects, with an estimated seven-figure cost avoidance. Documentation & diagramming: Visio network diagrams, architecture documentation, and STIG-compliant documentation. Education: BS in Network Engineering and Security, Cisco track. I also hold Network+, Cloud+, and ITIL 4. No project is too small. Whether you need a single firewall fixed, a network diagram drawn, or a multi-site rollout planned, I'm happy to help. Send me a message with what you're trying to accomplish and I'll tell you honestly whether I'm the right fit.