Proxmox cluster + PBS
- What I did: deployed a Proxmox cluster with 7+ nodes across production and development.
- Result: automated hot backups with Proxmox Backup Server.
- Proxmox VE
- Proxmox Backup Server
Alejandro Páez
Sysadmin & ISP Network Specialist
Mar del Plata, Buenos Aires, Argentina
Linux systems administration, ISP networking, and automation. More than 14 years of experience with infrastructure and critical 24/7 services.
- ISP with 5,000+ users
- Proxmox cluster, 7+ nodes
- 50+ VMs in production
- MTTR: 90 to 30 minutes
Featured case studies
Real ISP implementations, focused on operational stability, automation, and measurable results.
BGP peering and ISP routing
- What I did: operated multi-homed BGP with routing policies, RPKI/IRR filters, and CDN prioritization.
- Result: 2 IPT upstreams, 2 external CDNs, 3 local CDNs, and 2 peerings to external customers.
- BGP
- RPKI
Real-time observability and alerting
- What I did: deployed Zabbix + Nagios + Grafana with alerts via Telegram bot.
- Result: real-time alerting for core infrastructure and services.
- Zabbix
- Nagios
- Grafana
- Telegram Bot
Managing 50+ VMs in production
- What I did: deployed and managed more than 50 VMs for critical services.
- Result: sustained operation of email, VoIP, monitoring, collaboration, and internal management.
- Proxmox
- Linux
- Open Source
Professional Experience
I started in 2011 as Help Desk at Cooperativa Batán and grew within ISP operations to supervising technology at Ecolan, an ISP with 5,000+ users. I combine networking, Linux systems, and automation so services run 24/7 without surprises: observability with alerts, hot backups, and reviewed, documented changes. I use AI as technical support; a person validates the final decision.
Languages: native Spanish · English self-assessed B1, currently learning
Technology and Innovation Supervisor — Ecolan Internet - Soluciones Tecnológicas
February 2024 — Present
- Standardized observability with Zabbix + Grafana and Telegram bot alerts: core-incident MTTR dropped from 90 to 30 minutes and overnight incidents by 80%.
- Automated operational processes and consolidated corporate services (email and VoIP) with 24/7 continuity.
- Defined continuity and scalability practices backed by hot backups with PBS (RPO 1 h · RTO 30-60 min).
Technical Support and Customer Service Coordinator — Ecolan Internet - Soluciones Tecnológicas
June 2020 — January 2024
- Coordinated L2/L3 support and the handoff with NOC and field teams.
- Managed incidents on passive on-call duty, sustaining 99.5%-99.9% uptime for critical services.
- Trained the team and improved support processes to escalate and document cases consistently.
Head of IT Operations — Ecolan Internet - Soluciones Tecnológicas
November 2017 — May 2020
- Maintained network and systems infrastructure in 24/7 high-availability environments.
Help Desk L1/L2/L3 — Cooperativa Batán
July 2011 — October 2017
- Resolved connectivity and service incidents at L1, L2, and L3 across more than 6 years of ISP operations.
Skills
Linux · Proxmox · PBS
Operation of 50+ VMs, corporate services, and hot backups.
See applied experienceBGP · RPKI/IRR · VPNs
ISP routing, BGP policies, and operation of upstreams, CDNs, and peerings.
See applied experienceZabbix · Grafana · Nagios
Observability and Telegram alerts for core infrastructure.
See applied experiencePython · Git · Ollama
Custom automation and local AI applied to network threats in Centinela.
See applied experienceTraining and lab work: Advanced IPv6 (LACNIC). Not presented as a production deployment.
More tools and technologies
Networking
BGP
OSPF
MikroTik
Ubiquiti
Juniper
Huawei
WireGuard
OpenVPN
phpIPAMSystems & Infrastructure
Proxmox
Linux
Windows Server
Nginx
Apache
Postfix
Dovecot
Asterisk
Issabel
Virtualmin / WebminObservability & BI
Zabbix
Grafana
Nagios
MetabaseSecurity & Access
Fail2ban
FreeRADIUS
Let's Encrypt
PassboltCollaboration & Management
Nextcloud
Odoo
Roundcube
WordPress
GitHub
KanboardVideo & Surveillance
Shinobi
Agent DVRProjects
Tools, automations, and dashboards built for real operations.
Centinela
PythonReal-time automatic detection and blocking of network threats for ISPs. Monitors MikroTik router connections via API and blocks malicious IPs with multi-layer threat intelligence.
- MikroTik API
- AbuseIPDB
- Ollama
- GeoIP
More projects: dashboards, APIs, and CLI tools
BCRA Dashboard
Local dashboard to track Argentine Central Bank (BCRA) indicators from a single screen. Combines a Python HTTP proxy, local cache with stale fallback, and a static frontend with no external dependencies.
HTTP proxy · Stale cache · Static frontend · BCRA API
Private repositoryCycling Dashboard
Cycling data analysis dashboard. Imports, consolidates, and visualizes training sessions with decoupled ingestion, DuckDB storage, and interactive charts with Dash + Plotly.
DuckDB · Dash · Plotly · Pandas
Private repositoryMeta Ads Toolkit
CLI toolkit to review, create, and monitor Meta Ads campaigns. Validates Marketing API access, lists campaigns, creates variants, and spins up a local metrics dashboard.
Meta API · Python CLI · Dashboard · Reporting
Private repositoryalejandropaez.ar
Professional portfolio. Next.js 16, TypeScript, Tailwind CSS, static export. Case studies, projects, certifications, and contact.
Next.js 16 · TypeScript · Tailwind CSS · Static Export
Private repositoryAI-assisted automation with human review
I use coding agents for diagnosis, scripts, and documentation. Ollama and Open WebUI support sensitive context on self-hosted infrastructure. Every change goes through local validation and Git diff review.
Certifications & Training
Contact
If your team is looking to add a Linux systems, ISP networking, or infrastructure operations profile, let’s talk. I’m looking for a full-time, on-site role and I’m based in Mar del Plata, Buenos Aires. Tell me about the role and the team.
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