Open to opportunities

Gabriel Stroeher

@gabrielstroeher

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Network, security, and IT infrastructure professional delivering reliable systems.

Brazil

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What I'm looking for

I am seeking hands-on roles in network, security, or infrastructure engineering where I can improve reliability, automate operations, and strengthen security within collaborative teams.

I am a dedicated Network, Security, and I.T. Infrastructure professional with hands-on experience as a System Administrator and IT Service Support, previously serving as a Network, Security, and I.T. Infrastructure Administrator and Network Technician. I focus on ensuring high availability, performance, and security across Linux and Windows environments, cloud platforms, and on-prem infrastructure.

I have led infrastructure migrations, monitoring platform modernizations, and security monitoring deployments — including migrations to Zabbix, integrations with Grafana, Wazuh deployments, and large-scale user and tenant migrations between Google Workspace and Microsoft 365. I routinely manage firewalls, WAFs, switches, servers, backup routines, and HA implementations while following ISO 9001:2015 and LGPD compliance practices.

I bring practical vendor and vendor-relations experience (MSPs, MSSPs), strong incident and NOC experience, and a commitment to continual improvement through automation, documentation, and security-focused operations. I hold multiple Fortinet certifications and Linux Foundation cybersecurity coursework, and I seek roles where I can scale resilient, secure infrastructure and improve operational excellence.

Experience

Work history, roles, and key accomplishments

Current

System Administrator

Current

T-Systems do Brasil

Feb 2025 - Present (1 year)

Configure, manage, and monitor Linux and Windows systems for HPC and PLM environments, improving availability and security through monitoring, automation, and incident remediation. Migrated monitoring to Zabbix, integrated Grafana dashboards, and deployed Wazuh for security monitoring.

Linux Windows Server Open Telekom Cloud Docker Kubernetes Zabbix Grafana Wazuh Active Directory

Network and I.T. Administrator

Grupo Coobrastur

Jan 2024 - Feb 2025 (1 year 1 month)

Administered cloud and on-premises infrastructure (Microsoft 365, Azure, AWS, GCP) and network/security appliances, led large-scale user and tenant migrations between Google Workspace and Microsoft 365, and implemented HA and WAF solutions. Planned and deployed IT infrastructure for new branches.

Azure AWS Google Workspace Active Directory Fortinet WAF Networking

NOC Technician

Aprimorar

Jun 2022 - Jan 2024 (1 year 7 months)

Provided Level 2 NOC support and 24x7 network monitoring using Zabbix, Grafana, PRTG and Nagios, conducted network mapping and implemented DDoS protection and security policies to improve network resilience. Performed preventive and corrective maintenance for servers and network equipment.

Zabbix Grafana PRTG Nagios Network Monitoring DDoS Protection Linux Windows VoIP

Help Desk Representative

Aprimorar

Jun 2021 - May 2022 (11 months)

Provided Level 1 technical support and first-contact resolution for ISP customers via phone and chat, troubleshooting connectivity and device issues while adhering to provider best practices. Focused on clear communication and reducing repeat incidents.

Help Desk Customer Support Troubleshooting VoIP TCP IP Ticketing Systems First Contact Resolutions

Education

Degrees, certifications, and relevant coursework

UniCesumar (Cesumar University)

Bachelor's Degree, Computer Networks

2024 -

Pursuing a Bachelor's Degree in Computer Networks with expected completion in June 2026, focusing on network design, security, and infrastructure administration.

Federal Institute of Education, Science, and Technology of Rio Grande do Sul (IFRS) - Feliz Campus

Technical Degree, Informatics

2018 - 2022

Completed a Technical Degree in Informatics integrated with High School, covering practical and theoretical foundations in computing and IT infrastructure.