# Spyros Tselentis

Spyros Tselentis is a remote worker on Himalayas, Network Data Engineer at OTE, based in Greece.

Source: https://himalayas.app/@spyrostselentis

```text
Network Infrastructure Engineer at NETWORK DATA ENGINEEROTE securing hybrid Azure networks and achieving 99.9%+ uptime.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Greece |
| Authorized to work in | Greece |
| Salary expectations | 40k+ EUR |
| Job categories | Network Engineer, Network Infrastructure Engineer, Network Data Engineer, Cloud Network Engineer |
| Skills | Network Infrastructure, Enterprise Networking, network design, Hybrid Cloud Networking, Network Security, Network Automation, Network Monitoring, Cisco Networking, Azure Networking, BGP, MPLS, IPsec VPN, ExpressRoute, DNS, Micro Segmentation |

## About

```text
At NETWORK DATA ENGINEEROTE, I manage enterprise networks across Azure and on-premises environments, including deployments for global organizations like Coca-Cola. I achieved 99.9%+ uptime through proactive monitoring and automated operations.

I implemented zScaler SASE and Guardicore micro-segmentation to improve threat protection and eliminate legacy VPN vulnerabilities. I also automated inventory management and switch configurations to reduce manual work.

Earlier, as a Junior Network Engineer at TITAN, I configured Cisco infrastructure, Azure virtual networks, and secure hybrid connectivity. My experience also includes FTTH installation and splicing optical fibers, as well as deploying network equipment in the field.
```

## Experience

### Network Data Engineer (current)

OTE. Sep 2024 - Present

```text
Managed enterprise-scale networks for global organizations like Coca-Cola, focusing on hybrid cloud environments, security hardening, and automation. Delivered secure, scalable network solutions and achieved 99.9%+ uptime.
```

Skills: Cisco, Azure, Zscaler, Guardicore, Jinja, SNMP, ServiceNow, Grafana, Nagios, DNS, network-design, Automation

### Junior Network Engineer

Titan. Feb 2024 - Sep 2024

```text
Installed and configured Cisco network equipment, utilized Ansible for automation, and managed advanced routing protocols including BGP and MPLS. Designed Azure virtual networks and implemented secure hybrid network solutions.
```

Skills: Cisco, Ansible, BGP, MPLS, VPN, IPSEC, Azure, Firewalls, Cisco-ISE, Network-Security

### FTTH Engineer

Kourassis Electrical Engineering. Jan 2023 - Jan 2024

```text
Installed and spliced optical fibers, ensuring reliable internet connectivity. Collaborated with ISPs to maintain seamless network operations and met project deadlines under adverse conditions.
```

Skills: Fiber-Optics, Network-Infrastructure, Installation, Troubleshooting

### Field Technician

Vision Mavridakis. Sep 2021 - Jan 2023

```text
Installed and configured access points, switches, racks, and routers. Implemented VLANs and RIP protocols, and collaborated on system integration projects including CCTV and fire alarms.
```

Skills: Cisco, VLAN, RIP, Network-Troubleshooting, CCTV, Fire-Alarm-Systems

## Education

### Fortinet

Fortinet Certified Professional Secure Networking, Network Security

```text
Earned the Fortinet Certified Professional Secure Networking certification in 2026.
```

### Check Point

Check Point Certified Security Administrator, Network Security

```text
Earned the Check Point Certified Security Administrator certification in 2026.
```

### Cisco

Implementing and Operating Cisco Enterprise Network Core Technologies, Networking

```text
Earned the Implementing and Operating Cisco Enterprise Network Core Technologies certification in 2025.
```

### Cisco

Implementing and Configuring Cisco Identity Services Engine, Network Security

```text
Earned the Implementing and Configuring Cisco Identity Services Engine certification in 2025.
```

### Microsoft

Azure Administrator Associate (AZ-104), Cloud Computing

```text
Earned the Azure Administrator Associate (AZ-104) certification in 2024.
```

### Microsoft

Azure Fundamentals (AZ-900), Cloud Computing

```text
Earned the Azure Fundamentals (AZ-900) certification in 2024.
```

### Microsoft

Designing and Implementing Microsoft Azure Networking Solutions (AZ-700), Cloud Networking

```text
Earned the Designing and Implementing Microsoft Azure Networking Solutions (AZ-700) certification in 2024.
```

### Cisco

Cisco Certified Network Associate, Networking

```text
Earned the Cisco Certified Network Associate certification in 2022.
```

### Hellenic Mediterranean University

Electronic Engineer, Electronic Engineering. 2015 - 2020

```text
Pursued a degree in Electronic Engineering from 2015 to 2020.
```

## Tech stack

- Grafana
- Nagios
- Ansible
- Jinja
- Azure Firewall
- ServiceNow

To contact Spyros, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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