Systems administrator with 10+ years of hands-on experience supporting mixed Linux/Windows infrastructure.
Aktualisiert am 01.10.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 01.10.2026
Verfügbar zu: 100%
davon vor Ort: 80%
Linux Administration
Remote Trouble Shooting
Netzwerkadministration
nginx
Linux Professional Institute
Firewall
Domain Name Server
SSL
VPN
pfSense
Hyper-V
VMware
Aruba
Instandhaltung
Fehlersuche
Windows Server
Exchange Server
Mailserver
English
Fluent
German
Fluent
Russian
Muttersprache

Einsatzorte

Einsatzorte

Berlin (+20km)
Deutschland
möglich

Projekte

Projekte

3 years 1 month
2022-03 - 2025-03

Maintained Linux-based server and client environments

System Administrator
System Administrator
  • Performed troubleshooting, recovery, and migration tasks across mixed Windows/Linux environments
  • Supported firewall, VPN, and monitoring infrastructure (Sophos UTM, SecurePoint, pfSense, CheckMk)
  • Managed SSL certificate integration, tunneling, and related security tasks
  • Performed hardware deployments and emergency on-site support
  • Continued remote administration of legacy customer infrastructure
Insight-IT GmbH
Blankenfelde-Mahlow
3 years
2020-01 - 2022-12

Maintained Windows and Linux server systems

System Administrator
System Administrator
  • Managed Active Directory services and Exchange 2016 hybrid migration
  • Supported storage, backup, and NAS systems
  • Troubleshot physical and virtual server environments
  • Supported AWS services (VPC, EC2, S3, Route53)
  • Migrated firewall infrastructure from Sophos UTM to pfSense
  • Automated SSL certificate deployment and maintained web services and domains
tmc Content Group GmbH
Berlin
8 years
2013-01 - 2020-12

Hardware and software diagnostics, repair, and deployment

Freelance IT Technician
Freelance IT Technician
Rollout and deplyment projects for clients including Bombardier, Vodafone, BMW
various
5 months
2018-02 - 2018-06

End-user support and workstation setup

IT Service Technician
IT Service Technician
  • Hardware and software troubleshooting
  • Support for Windows and Apple client systems
Jacobs Douwe Egberts (JDE)
Berlin
4 months
2017-09 - 2017-12

Hardware installation and setup

IT Rollout Technician
IT Rollout Technician
  • Software deployment and workstation configuration using AD and SCCM
  • Technical support and troubleshooting
Rolls-Royce Deutschland
Dahlewitz
11 months
2016-10 - 2017-08

Network administration and troubleshooting

System Administrator KVM Hyper-V MikroTik
System Administrator
  • Administration of Linux-based domain and infrastructure services
  • Deployment and maintenance of physical and virtual servers (KVM, Hyper-V)
  • Network administration and troubleshooting (MikroTik)
  • Backup management with Veeam
  • Infrastructure support and technical documentation
KVM Hyper-V MikroTik
Autodoc GmbH
Berlin
2 months
2016-02 - 2016-03

Software troubleshooting and user support

IT Service Technician
IT Service Technician
Remote and on-site technical support in Windows enterprise environments
Shire PLC
Berlin

Aus- und Weiterbildung

Aus- und Weiterbildung

Bachelor studies in Electronics and Communication Engineering (unfinished)


Certifications

  • Linux Administrator - Currently in progress
  • Linux Engineer - Currently studying

Position

Position

  • System Administrator
  • Infrastructure & Network Operations

Kompetenzen

Kompetenzen

Top-Skills

Linux Administration Remote Trouble Shooting Netzwerkadministration nginx Linux Professional Institute Firewall Domain Name Server SSL VPN pfSense Hyper-V VMware Aruba Instandhaltung Fehlersuche Windows Server Exchange Server Mailserver

Produkte / Standards / Erfahrungen / Methoden

Profile

System administrator with 10+ years of hands-on experience in Linux systems, networking, hardware diagnostics and repair, and infrastructure operations. Experienced in mixed Linux/Windows environments, troubleshooting, and practical day-to-day IT operations.


Technical Skills

Infrastructure

  • NAS systems (QNAP, Unraid)
  • Samba/CIFS
  • backup & recovery
  • virtualization (Proxmox VE, VMware ESXi)
  • AWS (VPC, EC2, S3, Route53)
  • monitoring (CheckMk)


Services

  • nginx
  • Apache
  • Microsoft Exchange

Betriebssysteme

Linux
Fedora, Ubuntu, CentOS, troubleshooting, Bash
Windows
Windows Server
Active Directory
hybrid Windows
Azure AD

Hardware

diagnostics and repair
deployments
migrations
on-site support

Einsatzorte

Einsatzorte

Berlin (+20km)
Deutschland
möglich

Projekte

Projekte

3 years 1 month
2022-03 - 2025-03

Maintained Linux-based server and client environments

System Administrator
System Administrator
  • Performed troubleshooting, recovery, and migration tasks across mixed Windows/Linux environments
  • Supported firewall, VPN, and monitoring infrastructure (Sophos UTM, SecurePoint, pfSense, CheckMk)
  • Managed SSL certificate integration, tunneling, and related security tasks
  • Performed hardware deployments and emergency on-site support
  • Continued remote administration of legacy customer infrastructure
Insight-IT GmbH
Blankenfelde-Mahlow
3 years
2020-01 - 2022-12

Maintained Windows and Linux server systems

System Administrator
System Administrator
  • Managed Active Directory services and Exchange 2016 hybrid migration
  • Supported storage, backup, and NAS systems
  • Troubleshot physical and virtual server environments
  • Supported AWS services (VPC, EC2, S3, Route53)
  • Migrated firewall infrastructure from Sophos UTM to pfSense
  • Automated SSL certificate deployment and maintained web services and domains
tmc Content Group GmbH
Berlin
8 years
2013-01 - 2020-12

Hardware and software diagnostics, repair, and deployment

Freelance IT Technician
Freelance IT Technician
Rollout and deplyment projects for clients including Bombardier, Vodafone, BMW
various
5 months
2018-02 - 2018-06

End-user support and workstation setup

IT Service Technician
IT Service Technician
  • Hardware and software troubleshooting
  • Support for Windows and Apple client systems
Jacobs Douwe Egberts (JDE)
Berlin
4 months
2017-09 - 2017-12

Hardware installation and setup

IT Rollout Technician
IT Rollout Technician
  • Software deployment and workstation configuration using AD and SCCM
  • Technical support and troubleshooting
Rolls-Royce Deutschland
Dahlewitz
11 months
2016-10 - 2017-08

Network administration and troubleshooting

System Administrator KVM Hyper-V MikroTik
System Administrator
  • Administration of Linux-based domain and infrastructure services
  • Deployment and maintenance of physical and virtual servers (KVM, Hyper-V)
  • Network administration and troubleshooting (MikroTik)
  • Backup management with Veeam
  • Infrastructure support and technical documentation
KVM Hyper-V MikroTik
Autodoc GmbH
Berlin
2 months
2016-02 - 2016-03

Software troubleshooting and user support

IT Service Technician
IT Service Technician
Remote and on-site technical support in Windows enterprise environments
Shire PLC
Berlin

Aus- und Weiterbildung

Aus- und Weiterbildung

Bachelor studies in Electronics and Communication Engineering (unfinished)


Certifications

  • Linux Administrator - Currently in progress
  • Linux Engineer - Currently studying

Position

Position

  • System Administrator
  • Infrastructure & Network Operations

Kompetenzen

Kompetenzen

Top-Skills

Linux Administration Remote Trouble Shooting Netzwerkadministration nginx Linux Professional Institute Firewall Domain Name Server SSL VPN pfSense Hyper-V VMware Aruba Instandhaltung Fehlersuche Windows Server Exchange Server Mailserver

Produkte / Standards / Erfahrungen / Methoden

Profile

System administrator with 10+ years of hands-on experience in Linux systems, networking, hardware diagnostics and repair, and infrastructure operations. Experienced in mixed Linux/Windows environments, troubleshooting, and practical day-to-day IT operations.


Technical Skills

Infrastructure

  • NAS systems (QNAP, Unraid)
  • Samba/CIFS
  • backup & recovery
  • virtualization (Proxmox VE, VMware ESXi)
  • AWS (VPC, EC2, S3, Route53)
  • monitoring (CheckMk)


Services

  • nginx
  • Apache
  • Microsoft Exchange

Betriebssysteme

Linux
Fedora, Ubuntu, CentOS, troubleshooting, Bash
Windows
Windows Server
Active Directory
hybrid Windows
Azure AD

Hardware

diagnostics and repair
deployments
migrations
on-site support

Vertrauen Sie auf Randstad

Im Bereich Freelancing
Im Bereich Arbeitnehmerüberlassung / Personalvermittlung

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Rufen Sie uns an +49 89 500316-300 oder schreiben Sie uns:

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