Holger Grittner

Q: Where is Holger based?

Holger is based in Hilden, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Holger speak?

Holger speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Holger have?

Holger has at least 57 years of experience. During this time, Holger has worked in at least 4 different roles and for 4 different companies . The average length of individual experience is 10 years and 6 months . Note that Holger may not have shared all experience and actually has more experience.

Q: What is Holger's latest experience?

Holger's most recent position is IT at Holger Grittner Consulting .

Q: What companies has Holger worked for in recent years?

In recent years, Holger has worked for Holger Grittner Consulting .

Q: Which industries is Holger most experienced in?

Holger is most experienced in industries like Education , Professional Services , and Information Technology . Holger also has some experience in Construction .

Q: Which business areas is Holger most experienced in?

Holger is most experienced in business areas like Information Technology , Operations , and Strategy .

Q: Which industries has Holger worked in recently?

Holger has recently worked in industries like Professional Services .

Q: Which business areas has Holger worked in recently?

Holger has recently worked in business areas like Information Technology .

Recommended expert

Hilden, Germany

Experience

Jan 2009 - Present

17 years 3 months

IT

Holger Grittner Consulting

Jan 2001 - Dec 2009

9 years

Managing Director and Partner

Polygon GmbH

Jan 1989 - Dec 2001

13 years

IT

Freelancer and Lecturer

Jan 1985 - Dec 1989

5 years

IT

Frank Neul und Holger Grittner GbR

Jan 1981 - Dec 1984

4 years

Apprenticeship as Central Heating and Ventilation Technician

Jan 1969 - Dec 1981

13 years

School education, intermediate school leaving certificate

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Education, Professional Services, Information Technology, and Construction.

Education

Professional Services

Information Technology

Construction

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Operations, and Strategy.

Information Technology

Operations

Strategy

Summary

My focus is on application development with VBA (macros) for Microsoft Access, Microsoft Excel and Microsoft Word. This includes process analysis, creating data models, designing the GUI, ribbon-based user guidance, as well as producing meaningful data outputs (lists, pivots and charts).

Microsoft Teams is also increasingly used as a collaboration tool, using many of its features: calling/video, calendar, Planner (Kanban), To Do, Lists, Forms, Whiteboard, Visio, topic-specific channels, etc.

Consulting and development according to IT baseline protection (BSI Standard) and ISO/IEC 27001, government experience (information security management) and General Data Protection Regulation (GDPR).

Skills

Areas Of Expertise

Software Development
Process Analysis And Data Modeling
Network And Desktop Administration
Remote And On-site Support
Training
Sales Of Hardware (Wortmann Ag), Components, Software And Accessories

Industries

Law Firms
Medical Practices
Government Agencies
Service Providers
Retail
Manufacturing
Logistics
Media
Associations

Operating Systems

Windows 98 To Windows 11
Windows Server From Nt4.0 To Windows Server 2019

Programming & Scripting Languages

Vba
Batch Scripting

Databases

Microsoft Access
Microsoft Sql Server
Mysql
Sql/400
Postgresql

Applications

Microsoft Office Products/applications (Word, Excel, Powerpoint, Outlook), All Versions (Microsoft 365, Office, Published App (Citrix))
Microsoft Sharepoint
Various Tools

Collaboration & Tools

Microsoft Teams (Calling/video, Calendar, Planner (Kanban), To Do, Lists, Forms, Whiteboard, Visio, Topic-specific Channels)
Active In Topic-specific User Forums (E.g. On Xing)

It Security & Standards

Consulting And Development According To It Baseline Protection (Bsi Standard)
Iso/iec 27001
Government Experience In Information Security Management
General Data Protection Regulation (Gdpr)
Protection Requirements Assessment According To Bsi Standard 200-2 Of The It Baseline Protection

Vba & Office Development

Macro Automation
Event-driven Programming
Userform Design
Ribbon Customization
Error Handling
Data Manipulation
Dynamic Arrays
Ado (Activex Data Objects)
Data Access Objects (Dao)
Adodb (Microsoft Activex Data Objects Database)
Com Add-ins
Api Integration
Custom Functions
Excel Object Model
Access Object Model
Word Object Model
Database Connectivity
Data Import/export
Pivottable Automation
Chart Automation
Report Generation
Template Management
Document Automation
Cross-application Scripting
Performance Optimization
Code Refactoring
Debugging Techniques
Version Control With Vba
Semantic Versioning
Reddick Naming Convention / General Coding Conventions

Buzzwords

User Experience (Ux)
Usability & User Experience (Uux) Design
Agile Methodologies
Devops
Continuous Integration/continuous Deployment
Stakeholder Management
Risk Management
Change Management
Project Scheduling
Government Experience
Hands-on Mentality

Languages

German

Native

English

Advanced

Education

Aug 1981 - Jul 1984

Apprenticeship as Central Heating and Ventilation Technician · Central Heating and Ventilation Technician · Germany

Aug 1969 - Jun 1981

Secondary School Certificate · School Education · Germany

Statistics

Experience

Total positions 6

Experience in Education 26 y

Avg length 10 y 2 m

Longest experience 17 y 2 m

Expertise

Recent roles IT, Managing Director and Partner, Apprenticeship as Central Heating and Ventilation Technician

Main industries Education, Professional Services, Information Technology

Main business areas Information Technology, Operations, Strategy

Qualifications

Profile

Created

August 2025

Last Update

November 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Holger based?

Holger is based in Hilden, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Holger speak?

Holger speaks the following languages: German (Native), English (Advanced).

How many years of experience does Holger have?

Holger has at least 57 years of experience. During this time, Holger has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 10 years and 6 months. Note that Holger may not have shared all experience and actually has more experience.

What roles would Holger be best suited for?

Based on recent experience, Holger would be well-suited for roles such as: IT, Managing Director and Partner, Apprenticeship as Central Heating and Ventilation Technician.

What is Holger's latest experience?

Holger's most recent position is IT at Holger Grittner Consulting.

What companies has Holger worked for in recent years?

In recent years, Holger has worked for Holger Grittner Consulting.

Which industries is Holger most experienced in?

Holger is most experienced in industries like Education, Professional Services, and Information Technology. Holger also has some experience in Construction.

Which business areas is Holger most experienced in?

Holger is most experienced in business areas like Information Technology, Operations, and Strategy.

Which industries has Holger worked in recently?

Holger has recently worked in industries like Professional Services.

Which business areas has Holger worked in recently?

Holger has recently worked in business areas like Information Technology.

What is Holger's education?

Holger attended education in Central Heating and Ventilation Technician.

What is the availability of Holger?

Holger is immediately available for suitable projects.

What is the rate of Holger?

Holger's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.