Jörg K.-Windows/Linux Consultant - Strengthening Cybersecurity
Check rate
Experience
Windows/Linux Consultant - Strengthening Cybersecurity
- Participation in projects aimed at improving the customer's infrastructure with regard to current threats to IT security.
- Windows Server (from 2008)
- Linux Server (mainly Ubuntu LTS)
- PKI
- VMWare / vSphere
- Red Hat Ansible
- checkmk
Linux Application Manager - Supporting application management for SMART PaaS at the data center of the Raiffeisen banking group
- Participation in the PaaS application management area
- Linux Red Hat 7/8 (Update/Upgrade)
- Red Hat OpenShift (container management)
- Apache Tomcat (installation or Update/Upgrade)
- UrbanCode Deploy (UCD)
- Ansible
- Atlassian Jira
- General application management The project mainly involved maintaining the Linux infrastructure (RedHat) based on Red Hat OpenShift and standardized virtual machines. This included installing patches and updates as well as troubleshooting malfunctions. This was done natively under Linux on the command line and with UrbanCode Deploy. Ansible was used to install and manage the configuration of containers and VMs. Outdated Tomcat and Jira installations in development and production environments were manually upgraded to current versions. Work was managed through Jira tickets, which were prioritized and processed independently. Regular releases of critical business software took place during defined maintenance windows, sometimes in the evenings, at night and on weekends.
Consulting on system monitoring with Icinga2
- Consulting and implementation of system monitoring, including satellites in distributed networks
- Linux (Ubuntu, Debian)
- Windows Server
- Windows 10
- Icinga2 with various extensions
- Graphite
- Grafana
Subproject Manager for User Representation/Rollout within the ALUS project
- Piloting and rollout of the final system for programming digital pagers (ALUS – AlarmierungsUpdateSystem) in the BOS/TETRA network in Bavaria for nPOL
- CA Service Desk Manager (TicketSystem)
- Standard software tools (Office, etc.) As part of the introduction of digital pagers, the rollout of the software solution was organized and coordinated. This included preparing on-site training for users in Bavaria as well as providing and revising documents (manuals, etc.).
Monitoring Consultant
- Revision (migration) and expansion of an existing monitoring system with Icinga2
- Ubuntu 18.04
- Icinga2
- Icingaweb2
- Grafana
- Graphite
Subproject Management: Design / Testing / Implementation of a System for Programming Digital Pagers for
- Design, testing, and implementation of a system for programming digital pagers for nPOL services in Bavaria
- Development of a proprietary protocol for over-the-air (OTA) programming
- Management and coordination of the developers, as well as creating the technical prerequisites for OTA control
- Windows 10
- Windows Server 2016, 2019
- Linux (Ubuntu)
- Icinga2 (including Graphite, Grafana, Nagvis)
- VMware ESXi and ESX; vSphere
- GitHub Server
- Sepura FRT (fixed-mount radios)
Subproject Management Service and Rollout in the Digital Radio Network Bavaria
- Rollout of the final system for device programming in Bavaria (>30 locations)
- Implementation of infrastructure monitoring for the central nPOL digital radio programming system
- Windows 10
- Windows Server 2008 R2, 2012 R2, 2016
- Linux (Ubuntu, Debian etc.)
- Icinga2 (including Graphite, Grafana, PNP, Nagvis)
- VMware ESXi and ESX from 5.5; vSphere
- Sepura Radio Manager from 2.3x
- Motorola ITM from V6.02
- Migration of virtual servers from the interim system to the final system
- GitHub Server
- Linux shell and Windows PowerShell programming
Consulting and Implementation of Monitoring for Autorisierte Stelle Bayern
- Design and implementation of system monitoring based on Nagios / Icinga2
- Linux (Ubuntu, Debian etc.)
- Icinga2 (including Graphite, Grafana, PNP, Nagvis)
- Windows Server 2019 including WSL
Technical Project Management Linux/Windows in the Digital Radio Network Bavaria
- Implementation of a decentralized interim update solution (device programming) for the digital radio network (BOS) in Bavaria
- Development of system monitoring based on Icinga2 for Autorisierte Stelle Bayern
- Support in the development of a final centralized system using VPN
- Windows 7, 8.1, 10
- Windows Server 2008 R2, 2012 R2, 2016
- SCCM
- Linux (Ubuntu, Debian etc.)
- Icinga2 and OMD (including Graphite, Grafana, PNP, Nagvis)
- VMware ESXi and ESX from 5.5; vSphere
- Sepura Radio Manager from 2.3x
- Motorola ITM from V6.02
- Linux shell and Windows PowerShell programming
Monitoring Consulting (Nagios)
- Adaptation of monitoring to specific requirements in Microsoft AD
- Optimization of Nagios checks in connection with MS AD
- Various adjustments to visualization (NagVis) and workflows
- Microsoft Windows AD
- Windows Server from 2003
- Linux (Ubuntu, Debian etc.)
- Nagios (OMD) including various plug-ins
- PowerShell and Bash scripting
- PHP
- Documentation
System Administration with Focus on Windows Servers and VMWare
- General administration and installation of Windows Servers (2003–2012) and migration of physical machines to a virtual environment
- Management of the VMWare environment and running VMs
- Deployment of hotfixes
- Troubleshooting issues
- Creation and customization of virtual machines according to customer requirements
- Migration of virtual machines to newer ESX versions
- Live migration of VMs within NetApp storage
- Documentation
- Windows Server 2003–2012
- VMWare ESX, vSphere, VMWare Web Client
- NetApp
- Symantec NetBackup
Nagios/Icinga Monitoring Upgrade and Data Center Operations System Administration
- Preparation of version upgrades and expansion of the existing monitoring system
- Administration of data center operations
- Nagios / Icinga (OMD) and various plug-ins
- Linux (Debian / Ubuntu)
- Windows Server 2003–2008 R2
- Shell programming
- PowerShell
- VMWare ESX (vSphere etc.)
- KVM (virtualization)
Web Services Administration
- Administration of internal web servers under Windows (IIS) and Linux (Apache, Tomcat)
- Windows Server 2003–2008 R2
- Linux (Debian, SUSE)
- IIS
- Apache
- Tomcat
- Nagios
- Shell scripting
- PowerShell
Consulting and Development of a Monitoring Project (“Self-Service” Monitoring)
- Development of a self-service monitoring tool based on Nagios/Icinga
- Linux (Debian)
- Nagios / Icinga and various plug-ins
- Shell scripting
- Windows (Server from 2003), clients from XP
- SNMP
- VPN, OpenVPN
- Firewalling with iptables
- Project management with JIRA
- Citrix XenServer 5.x
- JasperReports Server
- Tomcat and GlassFish as development tools
Upgrade from Enteo Netinstall V6.x to DSM7
- Upgrade of the Frontrange Enteo 6.x environment to DSM 7
- Setup of Windows patch management with WSUS
- Windows Server 2008 R2
- Windows SQL Server
- Frontrange Enteo Netinstall 6.x
- Frontrange DSM 7.x
- Microsoft WSUS Server
- Microsoft Windows XP, 7
- Microsoft MSI
Administration of the existing environment and subsequent migration
- System administration of the environment and planning/implementation of migrations
- Windows Server 2000–2008 R2
- Windows XP–7
- Microsoft SQL Server
- Microsoft WSUS
- Microsoft Exchange (2003, 2007, 2010)
- Lotus Domino and Notes
- Linux (Debian, RedHat, CentOS, SUSE)
- Samba
System Integration and Administration
- Setup and administration of the infrastructure (servers and render farm) for up to 150 employees for the film project ‘Lissi und der Wilde Kaiser’
- Linux (SUSE, RedHat, Debian)
- Database and file servers under SLES 9.x
- VMWare Server
- Windows 2000, XP
- Samba as AD DC server
Hardware Assembly Storage (SAN/FC)
- Setup of several SAN/FC storage systems for:
- Leibniz Rechenzentrum München
- GFS München
- Max-Planck-Institut für Plasmaphysik
- Max-Planck-Institut für Biochemie Martinsried / München
System Administration of Internal Systems
- System administration and user support for internal systems
- Microsoft Server NT–2003
- Windows 95–XP
- Terminal Server NT / Metaframe - 2003
- Novell NetWare 3.x / 4.x
- Linux (Debian)
- AIX 4.3.3–5.2
- Monitoring with Netsaint / Nagios
- Trend Micro SMB / Interscan VirusWall
- Windows Update Server
- Checkpoint Firewalling
- Tivoli TSM Backup
- Microsoft Office from 95 onwards
Self-employed IT Service Provider
Mostly small IT projects in office environments (networks). Windows / Linux / Monitoring
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Government and Administration, Telecommunication, Aerospace and Defense, Insurance, and Media and Entertainment.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Operations, Project Management, Customer Service, and Product Development.
Summary
I have had IT experience in a professional environment since 1991 (and have been working with computers in general since 1982). After several years as an employed System Engineer at an IT systems company, I have been working full-time as a freelancer/self-employed professional since 2004.
I have very extensive knowledge of Windows (from Windows 3.1 onward) and Linux (in recent years, with a focus on Debian and Ubuntu and their derivatives, but also RedHat, CentOS, and, to a lesser extent, SLES). In various data centers, I mainly built the server and client infrastructure and provided the associated user support when needed. I was also able to gain extensive experience with various tools (e.g. ticket systems) and methods (e.g. ITIL) used in modern IT.
Other areas of focus are monitoring (including visualizations; since 1999) of system environments, usually with Nagios, checkmk and Icinga (1 or 2), as well as virtualization (various vendors and solutions – including VMWare and Proxmox). I enjoy working with alternative, possibly unfamiliar, heterogeneous environments.
Skills
- Public Sector
- Banks
- It Systems Company
- Film And Media
- Healthcare
- Insurance
- Call Centers
- Software Development
- It Consulting
Languages
Education
Grammar school
none
Certifications & licenses
Prince Foundation
Prince Practionier
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Jörg is based in Siegsdorf, Germany and can operate in on-site, hybrid, and remote work models.
Jörg speaks the following languages: German (Native), English (Advanced).
Jörg has at least 33 years of experience. During this time, Jörg has worked in at least 20 different roles. The average length of individual experience is 2 years and 8 months. Note that Jörg may not have shared all experience and actually has more experience.
Based on recent experience, Jörg would be well-suited for roles such as: Windows/Linux Consultant - Strengthening Cybersecurity, Linux Application Manager - Supporting application management for SMART PaaS at the data center of the Raiffeisen banking group, Consulting on system monitoring with Icinga2.
Jörg's most recent position is Windows/Linux Consultant - Strengthening Cybersecurity.
Jörg is most experienced in industries like Information Technology, Government and Administration, and Telecommunication. Jörg also has some experience in Aerospace and Defense, Insurance, and Media and Entertainment.
Jörg is most experienced in business areas like Information Technology, Operations, and Project Management. Jörg also has some experience in Customer Service and Product Development.
Jörg has recently worked in industries like Government and Administration, Information Technology, and Banking and Finance.
Jörg has recently worked in business areas like Information Technology, Operations, and Customer Service.
Jörg attended Grammar school for none.
Jörg has 2 certificates. These include: Prince Foundation and Prince Practionier.
Jörg is immediately available part-time for suitable projects.
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Calculated based on our freelancers’ daily rates as of 17 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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