Theodor H.-IT Service Provider
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Experience
IT Service Provider
Theodor Heller Greenbyte Solutions
- Infrastructure support: Maintenance and administration of networks, servers and workstations
- Project delivery: Planning and implementation of new systems (e.g. FileServer/SharePoint migration, implementation of a Unified Endpoint Management system)
- Full service: End-to-end support for customer IT, including support, maintenance and strategic advice
Systems Engineer
Taifun Tofu GmbH
- Support and development of the company infrastructure
- Delivery of new projects in production environments, cloud, networking & security
- Responsibility for security & compliance, infrastructure & operations, and automation & configuration
- Technical project management and coordination between departments, support teams and external service providers
System Administrator
Otto Wulff GmbH
- Project lead for introducing a Sophos XDR solution to improve detection rates and speed up incident response
- Implementation of an endpoint management system based on Microsoft Intune
- Planning, piloting, phased rollout to 1000 endpoints and implementation of standard configurations (baselines, compliance checks)
- Development of automated patching and hardening workflows, reducing manual work and standardizing security updates
Apprenticeship as IT Specialist for System Integration
IT-Service Johannsen GmbH
- Vocational training with a practical focus on user support, incident management and customer service
- Early responsibility for on-site customer assignments: independent installation, configuration, troubleshooting and user training
- Contributed to rollouts, system installations, network & server projects, and documentation
- Fundamentals of virtualization (VMware/Hyper-V), backup/restore strategies and IT security
- Experience in customer communication, ticket handling and support process implementation
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Food and Beverage, and Construction.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Customer Service, Project Management, and Operations.
Summary
Systems Engineer with experience in infrastructure, system administration and project delivery.
Self-employed as an IT service provider since August 2024. Supporting customer infrastructure, delivering new projects and providing comprehensive assistance with all IT-related questions.
Skills
- Infrastructure: Administration Of Networks (Routing, Switching, Vpn), Proxmox, Vmware/Hyper-V, Windows And Linux Servers, And Storage Systems.
- Cloud & Collaboration: Microsoft 365 (Exchange, Teams, Sharepoint, Azure Ad), Google Workspace (User And Policy Management), Nextcloud (Open Source).
- Security: Firewall Management (Mikrotik, Sophos, Watchguard, Fortinet), Endpoint Security & Xdr, Backup And Restore Solutions.
- Mdm & Device Management: Intune, Jamf & Miradore For Windows, Macos & Mobile Devices (Policies, Software Distribution, Compliance).
- Project Work & Support: It Project Planning & Rollouts, Coordination With External Partners, User Support (1st–3rd Level), Troubleshooting & Training.
Languages
Education
IT-Service Johannsen GmbH
IT Specialist for System Integration
Statistics
Experience
Expertise
Qualifications
Frequently asked questions
Have questions? Find more information here.
Theodor is based in Denzlingen, Germany and prefers 100% remote projects.
Theodor speaks the following languages: German (Native), English (Advanced).
Theodor has at least 7 years of experience. During this time, Theodor has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 2 years and 10 months. Note that Theodor may not have shared all experience and actually has more experience.
Based on recent experience, Theodor would be well-suited for roles such as: IT Service Provider, Systems Engineer, System Administrator.
Theodor's most recent position is IT Service Provider at Theodor Heller Greenbyte Solutions.
In recent years, Theodor has worked for Theodor Heller Greenbyte Solutions, Taifun Tofu GmbH, Otto Wulff GmbH, and IT-Service Johannsen GmbH.
Theodor is most experienced in industries like Information Technology, Food and Beverage, and Construction.
Theodor is most experienced in business areas like Information Technology, Customer Service, and Project Management. Theodor also has some experience in Operations.
Theodor has recently worked in industries like Information Technology, Food and Beverage, and Construction.
Theodor has recently worked in business areas like Information Technology, Customer Service, and Project Management.
Theodor attended IT-Service Johannsen GmbH for IT Specialist for System Integration.
Theodor is immediately available part-time for suitable projects.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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