Holger Klink - Data Migration Sage 100 to Odoo

Q: Where is Holger based?

Holger is based in Merzalben, 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 (Intermediate) .

Q: How many years of experience does Holger have?

Holger has at least 18 years of experience. During this time, Holger has worked in at least 8 different roles and for 11 different companies . The average length of individual experience is 1 year and 8 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 Data Migration Sage 100 to Odoo at LRT Automotive .

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

In recent years, Holger has worked for LRT Automotive , Aktive-Time , and IF Blueprint AG .

Q: Which industries is Holger most experienced in?

Holger is most experienced in industries like Information Technology (IT) , Manufacturing , and Banking and Finance . Holger also has some experience in Automotive , Agriculture , and Chemical .

Q: Which business areas is Holger most experienced in?

Holger is most experienced in business areas like Information Technology (IT) , Project Management , and Product Development . Holger also has some experience in Business Intelligence , Logistics , and Supply Chain Management .

Q: Which industries has Holger worked in recently?

Holger has recently worked in industries like Information Technology (IT) and Automotive .

Q: Which business areas has Holger worked in recently?

Holger has recently worked in business areas like Information Technology (IT) and Product Development .

Recommended expert

Merzalben, Germany

Experience

Feb 2025 - Apr 2025

3 months

Data Migration Sage 100 to Odoo

LRT Automotive

SQL database development, design, and documentation of procedures, functions, and triggers
Migration of data from Sage Line 100 database to Odoo
Database design with MS-SQL Server and SQL (T-SQL)
Use of Power Query and Excel

Jun 2024 - Feb 2025

9 months

Application and database development

Aktive-Time

Implementation of a general web API for various clients (WPF, ASP.Net Core app)
Design and documentation of database and application architecture
Technologies: C#.Net Core 8.0, SQL, Entity Core 9.0, LINQ, ASP.Net Core Web API (JSON), Docker, Serilog

Aug 2020 - Mar 2024

3 years 8 months

Munich, Germany

ASP.Net application development

IF Blueprint AG

ASP.Net application and database development
Design and documentation of web APIs
Bug fixing in C#, WPF, and unit tests
Adjustments at ADO document level and VSTO add-ins
Development of Office add-ins for Excel, Word, and SLV
Technologies: C#, .Net Framework 4.8, VBA, Python, WPF, VSTO, Windows API, .Net Core, Excel-DNA, SQLite DB, Autofac, ClosedXML, Log4Net, COM interop, ActiveX, custom task pane, WCF, XAML

Jul 2019 - Mar 2020

9 months

Unterschleißheim, Germany

Application development

Alpine

Implementation of a 64-bit legacy wrapper
Implementation of EF Core (context manager, repository, SQLite DB)
Bug fixing with debugging and testing in C#, WPF
Implementation of an ASP.Net Core Web API for data exchange
Technologies: C#.Net, SQL, Entity Core 2.2/3.1, LINQ, ASP.Net Core Web API (JSON), SQLite

Oct 2018 - Mar 2019

6 months

Stuttgart, Germany

Visual Studio application development

MDC Stuttgart

Integration of .Net WinForms and WPF into Sage 100 GUI (MS Access)
Project management, design, planning, and development
Technologies: C#, Entity Framework, LINQ, Access VBA, WPF, WinForms, SQL

Aug 2018 - May 2019

10 months

Stuttgart, Germany

Application Development

MDC Stuttgart

DRACOON cloud integration with Sage Line 100
Project management, concept design, planning, and development
Technologies: C#.Net, Sage add-in (Access, VBA), SQL, Entity Framework 6.2, LINQ, ADO

Oct 2017 - Feb 2018

5 months

Stuttgart, Germany

Application Development

MDC Stuttgart

Revision and further development of the existing Sage Access add-in
Project management, concept design, planning, and development
Technologies: Access, VBA, ADO, SQL, Word, Outlook

Jun 2017 - Oct 2017

5 months

Stuttgart, Germany

Application Development

MDC Stuttgart

Programming of the Sage task center
Project management, concept design, planning, and development
Technologies: C#, Entity Framework 6.2, LINQ, ADO.Net, SQL

Mar 2017 - Apr 2017

2 months

Stuttgart, Germany

Application Development

MDC Stuttgart

Integration of Bonobo Git Server and DRACOON Cloud with JSON REST and version control
Use of Thomson Reuters RFA API and OpenDacs
Project management, concept design, planning, and development
Technologies: IIS, Git

Jan 2017 - Apr 2017

4 months

Stuttgart, Germany

Application Development

MDC Stuttgart

Creation of reports in SSMS (Reporting Services) and Excel
Project management, concept design, planning, and development
Technologies: VBA, SQL, ADO

Oct 2016 - Feb 2019

2 years 5 months

Schwaig, Germany

Application development

1stVision

Retrieval of currency, foreign exchange and precious metal rates via Reuters RFA API
Development of Windows services for scheduled processing of export and import interfaces
Technologies: C#.Net, SQL, XML

Sep 2016 - Jan 2017

5 months

Stuttgart, Germany

Application development

MDC Stuttgart

Revision of auditor assignment and server certificate management in a Windows domain (AC)
Creating new Word documents and coding text blocks
Project management, concept, planning and development
Technologies: MS-SQL Server, Sage Add-In (VBA), SQL

Sep 2016 - Oct 2016

2 months

Application development

O & S EDV Weingarten

Updating legacy systems
Project management, concept, planning and development
Technologies: VB.Net, Sage Add-In (VBA), SQL

Development of SQL database triggers for table synchronization of different Sage databases
Project management, concept, planning and development
Technologies: SQL

Jan 2015 - Sep 2015

9 months

Munich, Germany

Application development

Smeg Hausgeräte GmbH

Development of a logistics interface between Sage OfficeLine and Rhenus
Setup of a transfer database and a Windows service
Implementation of an SFTP interface and MS SQL report server
Technologies: VB.Net, Sage Add-In (VBA), SQL

Jul 2014 - Jul 2015

1 year 1 month

Dahn, Germany

Application development

SLS Kunststoffverarbeitungs GmbH & Co. KG

Preliminary costing with quote creation for AktiveTime manufacturing
Development of quantity-dependent quote creation based on a resource list
Technologies: PowerBuilder application, VBA

Jun 2013 - Aug 2013

3 months

Munich, Germany

Application Development

Smeg Hausgeräte GmbH

Development of a purchase disposition in Excel with document workflow
Project management, design, planning and development
Technologies: VBA, SQL

Oct 2012 - Nov 2012

2 months

Munich, Germany

Application Development

Smeg Hausgeräte GmbH

Extension of the ServiceTool software to include a reminder system for technicians
Project management, design, planning and development
Technologies: Powerbuilder .Net Win Form Application

May 2012 - Jul 2016

4 years 3 months

Dahn, Germany

Database Development

SLS Kunststoffverarbeitungs GmbH & Co. KG

Development and delivery of reports with MS-SQL Reporting Services
Project management, design, planning and development
Technologies: SQL (T-SQL), stored procedures and functions

Mar 2012 - Dec 2012

10 months

Munich, Germany

Application Development

Smeg Hausgeräte GmbH

Development of a logistics interface from Sage OfficeLine to COGLAS GmbH Logistic Solutions
Project management, design, planning and development
Technologies: Sage Add-In (VBA Access), SQL

Jan 2012 - May 2012

5 months

Munich, Germany

Application Development

Smeg Hausgeräte GmbH

Development of a .Net WCF service to connect the service software and web client
Project management, design, planning and development
Technologies: Powerbuilder .Net Winform Application, VB.Net WCF service, TAPI interface

Jan 2010 - Jul 2010

7 months

Munich, Germany

Application Development

Smeg Hausgeräte GmbH

Development of a service center web client for field staff
Features for reports, customer lists, online orders and bonus calculation
Technologies: Powerbuilder .Net Web Form Application

Mar 2009 - Mar 2016

7 years 1 month

Munich, Germany

System Administrator

Smeg Hausgeräte GmbH

Administration of servers, networks, devices and software
Support of Windows Server domains (DNS, DHCP, AD), SQL Server, Exchange Server, ESXi Server
Use of Symantec Backup Exec, time tracking systems and telephone systems

Sep 2004 - Oct 2005

1 year 2 months

Dortmund, Germany

Application Development

Hadley Profiltechnik GmbH

Customization of the AktiveTime manufacturing for coils in roll production
Project management, concept, planning and development
Technologies: Powerbuilder Application, Sage Add-In (VBA), VBA

Mar 2003 - May 2006

3 years 3 months

Application Development

Aktive-Time Software

Development of a PPS production management system as an add-in for Sage OfficeLine
Project management, concept, planning and development
Technologies: Powerbuilder Application, Sage Add-In (VBA), VBA

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (10.5 years), Manufacturing (8.5 years), Banking and Finance (2.5 years), and Automotive (1 year).

Information Technology

Manufacturing

Banking and Finance

Automotive

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (18.5 years), Project Management (10 years), Product Development (5.5 years), Business Intelligence (4.5 years), Logistics (1 year), and Supply Chain Management (0.5 years).

Information Technology

Project Management

Product Development

Business Intelligence

Logistics

Supply Chain Management

Summary

Creative professional with extensive project experience. My strengths include analytical thinking, creativity, perfectionism, passion, patience, and teamwork.

As a self-employed database and software developer, I have spent the last years designing and developing projects for mid-sized industrial companies, banks, government agencies, and automotive suppliers. My main areas include ERP systems (Sage 100), production planning (PPS), PowerBuilder applications, interfaces, as well as standalone solutions for government agencies.

Besides project work, I'm open to new challenges and can well imagine bringing my experience in a temporary assignment (ANÜ) or in a permanent position.

Skills

Project Management And Consulting
Legacy System Migration
Digitization Of Government Authorities And Offices
Analysis, Planning, Programming, Implementation, Documentation, And Training

Programming And Development

Backend And Frontend Programming In C#/vb.net (Framework, Core), Vba (Winforms, Wpf, Wcf, Soap, Json/rest, Asp.net Web Service, Services, Interfaces)
Database Programming (Ms-sql Server, Sqlite, Transact-sql)
Erp Application Development, Especially Sage Line 100 (Officeline), In C#, Powerbuilder, Vb.net, And Access (Vba)
Customizations In Sage Line 100 (Documents, Dcm, Add-in, App Designer, Task Center)
Interface Programming For Logistics, Pps, Shop Floor Data Acquisition (Bde), Time Tracking, Cloud Integration
Ms Office Programming (Vba, Vsto, Com Interop)

Programming Focus Areas

C#
Vb.net
Vba
Sql
Ms Office
Powerbuilder

Databases

Ms-sql Server (Ssms, T-sql, Procedures, Functions, Triggers, Db Design, Reporting Services)
Sqlite
Sybase Ase

Frameworks And Technologies

Entity Framework / Core
Asp.net Web Api
Linq
Ado / Ado.net
Winforms
Wpf
Wcf

Data Formats

Xml
Json
Xaml

Tools

Visual Studio
Git
Docker
Jira
Vs Code

Special Skills

Thomson Reuters Api Rfa (Robust Foundation Api), Opendacs
Dracoon Cloud (Json Rest, Swagger-codegen)
Sage Task Center (Logisoft)

Administration

Exchange
Windows Domain (Ac), Networks
Windows Server
Ms-sql Server
Vmware Esxi
Hyper-v
Linux Server
Iis
Core Ftp

Ms Office

Word
Excel
Access
Powerpoint

Languages

German

Native

English

Intermediate

Education

Sep 2000 - Jul 2002

Commercial School Donaueschingen

Secondary school leaving certificate · Secondary school leaving certificate · Donaueschingen, Germany

Sep 2000 - Jul 2002

IT Consulting Weiss Schiltach

IT Specialist for Application Development · IT Specialist for Application Development · Schiltach, Germany

Profile

Created

August 2025

Last Update

August 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 Merzalben, 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 (Intermediate).

How many years of experience does Holger have?

Holger has at least 18 years of experience. During this time, Holger has worked in at least 8 different roles and for 11 different companies. The average length of individual experience is 1 year and 8 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: Data Migration Sage 100 to Odoo, Application and database development, ASP.Net application development.

What is Holger's latest experience?

Holger's most recent position is Data Migration Sage 100 to Odoo at LRT Automotive.

What companies has Holger worked for in recent years?

In recent years, Holger has worked for LRT Automotive, Aktive-Time, and IF Blueprint AG.

Which industries is Holger most experienced in?

Holger is most experienced in industries like Information Technology (IT), Manufacturing, and Banking and Finance. Holger also has some experience in Automotive, Agriculture, and Chemical.

Which business areas is Holger most experienced in?

Holger is most experienced in business areas like Information Technology (IT), Project Management, and Product Development. Holger also has some experience in Business Intelligence, Logistics, and Supply Chain Management.

Which industries has Holger worked in recently?

Holger has recently worked in industries like Information Technology (IT) and Automotive.

Which business areas has Holger worked in recently?

Holger has recently worked in business areas like Information Technology (IT) and Product Development.

What is Holger's education?

Holger attended Commercial School Donaueschingen for Secondary school leaving certificate.

What is the availability of Holger?

Holger is immediately available part-time 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.