Heriberto Muñoz

WORK EXPERIENCE

Owner / Founder 2021 – Present

Systemius LLC | Puerto Rico

Helped clients expand operations and improve efficiency by delivering cost‑effective infrastructure and technology solutions.
Provided strategic recommendations that increased partner ROI through optimized systems and smart product selection.
Strengthened customer cybersecurity posture by hardening networks and reducing exposure to cyber threats.
Enhanced network and VoIP stability for clients, resolving and preventing issues with an average 85% reduction in recurring problems.
Improved customer infrastructure by optimizing server and virtual environment performance and implementing resilience‑focused hardening to reduce vulnerabilities, minimize downtime, and support scalable growth.

IT/Network Specialist 2018 – 2021

Allied Technology Group | Puerto Rico

Managed and maintained Linux and Windows server environments, ensuring stable and reliable customer operations.
Supported and administered IP telephony systems, including PBXs and call managers, delivering effective diagnostics and resolving complex VoIP issues.
Performed WISP‑related tasks such as spectrum analysis, antenna alignment, and customer provisioning to optimize wireless performance.
Conducted systematic diagnostics and root‑cause analysis to resolve network, server, and telephony issues across diverse environments.

Network Administrator 2015 – 2018

Ednet | Puerto Rico

Configured switches, routers, and network equipment across diverse customer environments.
Managed Incident Response activities, isolating faults and restoring service efficiently.
Implemented perimeter security policies through firewall rules and access controls.
Performed RF and spectrum analysis to identify interference and improve wireless coverage.
Supported WISP operations by deploying wireless links, validating signal paths, and ensuring reliable customer onboarding.

UNIX Administrator 2006 – 2015

Dreyfous & Associates | San Juan, Puerto Rico

Administration of file servers, mail servers, web servers, DNS servers, FTP servers, and backup servers
Installation of Cisco switches and routers
Implementation of Linux servers (mail, web, file)
Configuration of Linux firewalls and proxies

System Administrator 2004 – 2006

Wisemedia | San Juan, Puerto Rico

Administered PHP-based web applications and LAMP stack environments, deploying custom scripts and maintaining server-side logic for digital media platforms.
Managed MySQL databases including schema design, query optimization, routine backups, and performance tuning for high-traffic content delivery systems.
Configured and maintained network infrastructure including DNS zones, FTP file transfer services, firewall rules, and load balancing across web server clusters.
Implemented comprehensive backup and disaster recovery procedures for file servers, mail servers, and application databases ensuring business continuity.

IT Specialist 2000 – 2004

MACisland Consulting Inc. | Levittown, Puerto Rico

Additional references available upon request.

Category	Tools/Technologies
Scripting	Shell scripting, Python
Databases	MySQL, PostgreSQL
Operating Systems	RHEL, Debian, FreeBSD/NetBSD, Windows Server, macOS
Servers & Infrastructure	Physical/virtual servers, storage systems, backup solutions, Apache/NGINX, Nagios, Cacti, Zabbix, MySQL
Security	Palo Alto, Fortigate, Linux iptables, Cisco PIX, Sophos, pfSense, OpenSense
Networking	Juniper, Cisco, Mikrotik, HP, Aruba, Ubiquiti, FiberStore, Tmarc, Accedian
Advanced Networking & Routing	iBGP, eBGP, OSPF, OSPFv3, EIGRP, VRF, VPLS, MPLS, VPNs, QnQ
Containers	Docker
Virtualization	VMware ESXi, Proxmox, Xen Server
Cloud	AWS (Amazon Web Services)
VoIP/Telephony	PBX systems (FreePBX 3CX), SIP, call routing, QoS optimization
Incident Response	Metasploit, Nmap, Wireshark, Threat detection, Security monitoring
Testing & Validation Tools	Viavi test platforms, iPerf performance testing, RFC 2544 service validation
WiFi & RF Technologies	Wireless network design, RF optimization, spectrum analysis, access point deployment