Mark S.-IT Administration, IT Consulting, IT Coordination and Control, Software Distribution, User and Access Management, IT Support
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Experience
Administration / Operations / Configuration / Control / Coordination
HZD
- Administration / configuration / operation / provision / troubleshooting of Windows Server systems (2012 - 2025) in a multi-domain infrastructure according to tiering level
- Operation of Windows systems (VMware, Hyper-V and physical)
- Automated installation and patch management via MECM / WSUS
- Creation of server hardening / operating system hardening according to BSI
- Administration / configuration / operation of Active Directory (AD)
- Administration / configuration / maintenance of GPOs / GPPs / DNS / DHCP
- Administration of cluster systems
- Support in the patch management process
- Support in the backup process
- Support with PKI deployment
- Granting, changing and revoking access permissions and access groups, control and documentation
- Control/coordination between business departments and different service providers
- Change management – review, evaluation and control of change requests
- Implementation of change requests
- Performance analysis to optimize operating systems
- Responsibility for resolving incidents and internal service requests
- Second- and third-level support
- Creation of documentation, operating manuals and presentations
- Working according to ITIL
Administration / Operations / Configuration / Control / Coordination
ITZBund
- Operation of Windows domains via VMware
- Installation, administration and troubleshooting of enterprise/datacenter, application and terminal servers in a multi-domain infrastructure according to tiering level
- Administration, operation and maintenance of Active Directory environments and group policies (GPOs)
- Administration, operation and maintenance of file services and RDSH environments
- Automated installation, software distribution and patch management via MECM and WSUS
- Introduction, operation and maintenance of LAPS and AppLocker
- Monitoring and logging via SCOM, Check-MK and Splunk
- System and browser hardening according to BSI guidelines
- Management of clients and tokens in the RSA console
- Coordination between business departments and service providers
- Granting, changing and revoking access permissions
- Use of Microsoft PowerShell for routine tasks
- Responsibility for resolving incidents and service requests
- Third-level support and migration support
- Implementation of change requests and participation in processes
- Creation of documentation, operating manuals and presentations
- Working according to ITIL and IT-Grundschutz (BSI)
Administration / Configuration / Design
Audi AG / Volkswagen AG
- Development of a System Center Configuration Manager architecture
- Testing of functions and defined processes within SCCM
- Migration testing of client objects using SCCM, task sequences and scripts
- Analysis of applications, packages, collections, OSD and security roles
- Testing and adjustment of group policies (GPOs)
- Object restructuring and migrations in Active Directory
- Reporting and execution of user acceptance tests
- Support with the handover to operations and third-level support
- Creation of documentation and presentations
Architect Technical Desktop Integration Service (TDIS)
Deutsche Apotheker und Ärztebank
- Redesign and development of the IT infrastructure for Windows 10 and Office 2016
- Analysis and evaluation of existing group policies (GPO/GPP)
- Development of new GPO/GPP and LS structures for a security zone concept
- Client and image design as well as client security
- Development of a WaaS strategy (Windows-as-a-Service)
- Provision of Windows 10 OSD scenarios
- Strategy development for Citrix users and ADMX template updates
- Creation of high-level and low-level workplace concepts
- Creation of documentation and presentations, and conducting workshops
Administration / Engineering
HDI Systeme AG (Talanx Systems AG)
- Provision, configuration and administration of the test environment via SCCM, Citrix Studio and VMware
- Analysis, development and provision of the semi-annual Windows 10 feature updates
- Administration and coordination of multi-level test environments, as well as defect processing and error analysis
- Application and implementation of BSI IT-Grundschutz (ISO 27001)
- Error analysis and troubleshooting of applications and software packages on terminal servers, clients and mobile devices
- Creation of task sequences and build-&-capture processes
- Integration of new software packages and coordination with product owners
- Introduction of new technologies and processes (Exchange Online, SharePoint Online, Office 365, Citrix XenDesktop, MS Azure)
- Creation of documentation and presentations
Administration / Control / Coordination / User Management
Commerzbank AG
- Administration and coordination of multi-level test environments and locations as well as user administration
- Provision and administration of a VMware test environment for online banking
- Administration of mobile devices and tablets
- MSI software packaging
- Preparation, review and assessment of firewall requests and approvals
- Implementation of BSI IT Baseline Protection (ISO 27001)
- Error analysis and troubleshooting of clients, network, firewall and apps
- Central point of contact for users, clients and mobile devices
- VPN and firewall configuration
- Role, group and user administration as well as access management
- Coordination of external locations
- Introduction of new products, procedures and test automation
- Introduction of cloud technologies
- Creation of documentation and presentations
Administration / Control / Coordination / User Management
Commerzbank AG
- Provision of Windows 7 VDIs for testing new software packages and error analysis
- Provision, configuration and administration of Citrix VDIs for package testing and acceptance
- Preparation, review and assessment of firewall requests and approvals
- Implementation of BSI IT Baseline Protection (ISO 27001)
- Error analysis and troubleshooting of servers, clients, network and firewall
- Role, group and user administration as well as access management
- Central point of contact for users and clients
- Network connections, VPN and firewall configuration
- Creation of documentation and presentations
Administration / Control / Coordination / Operations and User Management
Commerzbank AG
- Administration, analysis, provision and operation of the production reference environment for servers, clients and users
- Installation, configuration and administration of HP servers and blades
- Administration of physical HP clients and VMware clients
- Administration of HP enclosures and blades
- Role, group and user administration as well as access management
- Preparation, review and assessment of firewall requests
- Implementation of BSI IT Baseline Protection (ISO 27001)
- Error analysis and troubleshooting of servers, clients, network and firewall
- Analysis of the NetInstall package structure with AppDNA
- Restructuring of the server-client environment
- Creation of documentation and presentations
Administration / Control / Coordination / Operator
Commerzbank AG
- Administration and coordination of the installation, delivery, setup and commissioning of branch servers
- Installation and configuration of HP infrastructure servers
- Coordination of the rollout in cooperation with Commerzbank and HP
- Commissioning and monitoring of firewall approvals, switch and port configuration
- Network and DNS configuration as well as troubleshooting
- Maintenance of the HP database (ESL)
- Creation of documentation and presentations
Administration / User Management
Commerzbank AG
- Administration, configuration and operation of a multi-level test environment for the merger of Commerzbank and Dresdner Bank
- Installation, configuration and operation of HP servers and blades
- Operation of physical and virtual test clients with VMware
- Administration and error analysis of servers, clients, network and firewall
- Role, group and user administration as well as access management
- First-, second- and third-level support for over 15.000 test users
- Maintenance of the HP database (ESL)
- Creation of documentation and presentations
Administration / Coordination
Henkel KGaA
- Administration of several hundred Windows servers
- Installation and configuration of servers (OS and HP tools)
- Administration of HP enclosures and blades
- Troubleshooting of servers, network, firewall and DNS
- Change Supervisor in OVSD (HP ticket system)
- Risk assessment and coordination of the helpdesk (e.g. India)
- Coordination of various specialist groups (email, Citrix, VMware, storage, etc.)
- Monitoring of MS software updates (Patch Day)
- Maintenance of the HP database (ESL)
- Creation of documentation
Administration
Deutsche Post / DHL
- Carrying out and supporting software rollouts
- Data backup and data recovery
- Installation via software distribution and configuration
- Carrying out functional tests
- First- and second-level support
- Creation of documentation
Trainer
Training provider
- Conducting MOC courses and workshops for Windows Server and Windows Client
- User training for MS Office
- Security and networking courses for CompTIA Security+ and Network+
- Creation and use of training manuals and course materials
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Banking and Finance, Information Technology, Government and Administration, Education, Chemical, and Automotive.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Operations, Customer Service, Quality Assurance, Human Resources, and Project Management.
Summary
I have more than 20 years of experience in demanding, large and complex IT environments. Through many tasks and projects, I have built up extensive knowledge in various areas. In enterprise environments with high security requirements, the BSI IT-Grundschutz (ISO 27001) forms the basis of IT security and was part of my daily work. My areas of responsibility include IT administration and IT coordination/control, software distribution via MECM, as well as user and access management. A key focus is acting as the link between business and IT departments, third-party or connected systems, IT infrastructure, different locations, external service providers and suppliers. MECM software distribution, developing solutions in cooperation with product owners and package developers for the provision and error analysis of MECM software packages are part of my responsibilities. Administration of permissions according to role concepts, as well as user and account management in complex and diverse environments. Helpdesk and support tasks – error analysis, request, incident and change management/processing in test, reference and production environments, as well as defect management and processing in multiforest environments. My skills are complemented by experience in customer support, strong communication skills and working according to ITIL and internal processes. Many years of experience as a certified Microsoft and CompTia trainer.
Skills
Roles: Administration / Operations / Support / Control / Coordination / Consulting / Consulting Deputy Project Management / It Coordination / Organization Testing / Coaching / Instruction / Training
Areas Of Responsibility / Focus Areas: Administration And Operation Of Enterprise Environments, Multi-Domain Infrastructure According To Tiering Level Under Windows Server And Clients (Active Directory, Gpos / Gpps / Dns / Dhcp) Administration And Operation Of Users And Access Rights According To Rights And Role Concepts Administration And Operation Of Data Centers Operation Of Multi-Domain Infrastructure Using Hyper-V, Vmware And Citrix Operation Of Remote Desktop Services, Windows Terminal Server Software Distribution And Patch Management With Mecm And Wsus Change And Incident Management, Control And Processing Of Requests, Incidents And Changes In Different Itsm Suites It Control And Coordination Between Business And It Departments As Well As External Service Providers Control And Administration Of Firewall Requests And Approvals 2- And 3-Level Support And Helpdesk Creation Of Documentation, Operating Manuals And Presentations
It Skills: Server Systems - Server 2025 / 2022 / 2019 / 2016 (Active Directory / Gpo / Dns / Dhcp) Client Systems - Win11 / Win10 / Win7 Office - 365 / 2021 / 2019 / 2016 Etc. Software Distribution + Patch Management – Mecm / Wsus Vmware / Vsphere / Hyper-V / View Administrator Citrix - Citrix Studio (Vdi Deployment) And Push Applications Ticketing Tools - Bmc-Remedy / Itsm-Framework / Service-Now / Hpsm Account And User Administration (Management) - Active Directory / Sam Enterprise / Servicenow Security - Server Hardening / It-Grundschutz / Microsoft Endpoint Protection
Industries: Public Sector Federal + State Automotive Finance Insurance Chemicals Logistics Telecommunications
Languages
Education
Training
IT Specialist · Systems Integration
Certifications & licenses
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Mark is based in Andernach, Germany and prefers 100% remote projects.
Mark speaks the following languages: German (Native), English (Elementary).
Mark has at least 21 years of experience. During this time, Mark has worked in at least 11 different roles and for 9 different companies. The average length of individual experience is 2 years and 7 months. Note that Mark may not have shared all experience and actually has more experience.
Based on recent experience, Mark would be well-suited for roles such as: Administration / Operations / Configuration / Control / Coordination, Administration / Configuration / Design, Architect Technical Desktop Integration Service (TDIS).
Mark's most recent position is Administration / Operations / Configuration / Control / Coordination at HZD.
In recent years, Mark has worked for HZD and ITZBund.
Mark is most experienced in industries like Banking and Finance, Information Technology, and Government and Administration. Mark also has some experience in Education, Chemical, and Automotive.
Mark is most experienced in business areas like Information Technology, Operations, and Customer Service. Mark also has some experience in Quality Assurance, Human Resources, and Project Management.
Mark has recently worked in industries like Information Technology and Government and Administration.
Mark has recently worked in business areas like Customer Service and Information Technology.
Mark attended Training for Systems Integration.
Mark has 10 certificates. Among them, these include: Microsoft Certified IT Professional (MCITP), Microsoft Certified Technology Specialist (MCTS), and Microsoft Certified Trainer (MCT).
Mark is immediately available part-time for suitable projects.
Daily rate distribution
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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 17 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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