Martin Schaefer - Measurement Data Provision via LoRa

Q: Where is Martin based?

Martin is based in Hanover, Germany .

Q: What languages does Martin speak?

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

Q: How many years of experience does Martin have?

Martin has at least 19 years of experience. During this time, Martin has worked in at least 25 different roles and for 17 different companies . The average length of individual experience is 1 year and 7 months . Note that Martin may not have shared all experience and actually has more experience.

Q: What is Martin's latest experience?

Martin's most recent position is Measurement Data Provision via LoRa at End Customer Project .

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

In recent years, Martin has worked for End Customer Project , KfW , End customer - migration project , Savings Banks Financial IT , and End Customer Projects .

Q: Which industries is Martin most experienced in?

Martin is most experienced in industries like Agriculture , Banking and Finance , and Automotive . Martin also has some experience in Information Technology , Healthcare , and Government and Administration .

Q: Which business areas is Martin most experienced in?

Martin is most experienced in business areas like Information Technology , Business Intelligence , and Research and Development . Martin also has some experience in Quality Assurance , Accounting , and Finance .

Q: Which industries has Martin worked in recently?

Martin has recently worked in industries like Banking and Finance , Information Technology , and Insurance .

Q: Which business areas has Martin worked in recently?

Martin has recently worked in business areas like Information Technology , Quality Assurance , and Business Intelligence .

Recommended expert

Hanover, Germany

Experience

Sep 2025 - Sep 2025

1 month

Measurement Data Provision via LoRa

End Customer Project

Measurement data provisioning via LoRa Things Network to PC.
Technologies: Python, PostGres, C#, Eagle

Jun 2025 - Aug 2025

3 months

Frankfurt, Germany

Quality Assurance, Code Review

KfW

Quality assurance and code review in SAS, DB2, and VBA and R.
Internal review of compliance with documentation and source code standards regarding BaFin regulations.
Keywords: ISTBQ, MS Office, NIS, Dora, Idgart, Git.

May 2025 - May 2025

1 month

Training: PostGres SQL

Instructor-led training.
EDB PostgreSQL administration & performance tuning.
Setting up backup and failover scenarios.

Feb 2025 - Apr 2025

3 months

Software Developer

End customer - migration project

Migrated a Delphi MS-SQL Windows application to a C# Wisej .NET Azure web application.

Oct 2024 - Dec 2024

3 months

Training

ISTBQ Foundation certificate – study and exam.
Python update.

Apr 2024 - Sep 2024

6 months

Frankfurt, Germany

Regulatory Reporting

Savings Banks Financial IT

Working in the CCR III domain.
Participated in two production go-live packages/events.
Agile development in direct contact with the business department.
Programming according to specifications.
Code review of source code from the team.
Answering tickets for customers (branches) under the guidance of subject matter experts.
Netting packages and risk allocation: Consolidation of individual instruments into netting packages under an existing netting framework agreement (go-live: July 2024).
Calculation of RWA (risk-weighted assets) for credit risk using the internal approach based on probability of default (PD), loss given default (LGD), and exposure at default (EAD) (go-live: Sept. 2024).
Tools: Unix shell, SAS 9.4, MS SQL, DB2, testing with OpenText ALM / OpenText QC, IBM code pipeline, WinSCP, Confluence, and MS Office.

Jan 2024 - Mar 2024

3 months

Software Developer

End Customer Projects

Recreated Docker files and Hyper-V for development environments.
Initial familiarization with Kubernetes.
Maintenance work in the Delphi UniGui area.
Office renovation.

Feb 2023 - Dec 2023

11 months

Frankfurt, Germany

DevOps Engineer and Tester

Deutsche Bank

Assigned to the infrastructure area.
Mainframe job monitoring / ad-hoc error analysis.
Code review.
Documenting Oracle, VBA, and SAS source code.
Version control with Git.
Time-shifted working model with colleagues in Bangalore.
Trainings: Risk Awareness, Anti-Financial Crime, Compliance, Market Participation & Banking Rules, Sanctions Essentials, Market Abuse & Antitrust, Data Protection & Privacy.
Technologies: SAS 9.4 z/OS / SAS PC / PL/I / ISPF / B92 / SFDF / TSO / VBA, Confluence / Office 365 (MS Access / MS Excel / MS Word).

Feb 2022 - Dec 2022

11 months

Munich, Germany

Data Analyst / Data Engineer

Bavarian Insurance Chamber

SAS mainframe to SAS BI migration for the mathematics and controlling departments.
Conversion of Host SAS, REX, and PL/I programs into SAS BI stored processes.
Collaboration on the analysis of existing reports on insurance contracts and cost overviews.
Professional and technical documentation in source code and Word of long-lived reports in collaboration with subject matter experts.
Agile working method with Scrum sprints and an iterative approach.
KPI creation regarding costs and volumes of contract types and insurance categories for private and statutory health insurance.
Tools: DB2 / SAS / ISPF / PL/I / PowerShell / MS Office / Confluence.

Feb 2021 - Dec 2021

11 months

Frankfurt, Germany

Data Analyst

Commerzbank

Data analysis & reporting with SAS 9.4 and SAS Viya in MS Office as well as Power BI.
Documentation (EUC / manual).
Simulations for controlling.
Support in defining allocation keys.
KPI and status / ad-hoc reporting.

May 2020 - Dec 2020

8 months

Hanover, Germany

Software Developer

CalRes DV

Redeveloped a Delphi accounting application in C# and partly in JavaScript using TMS WebCore components.
Data exchange with Tesseract OCR.
Technologies: C# - WinForms / Lazarus / Delphi / TMS WebCore, Oracle 12c / Oracle SQL Developer / Tesseract.

Apr 2019 - Mar 2020

1 year

Eschborn, Germany

Management Reporting

Deutsche Bank

Worked in identity and access management.
Documented data runs and time windows of data flows.
Created Oracle VIEWS/MVIEWS and PL/SQL routines for data retrieval from the central data warehouse.
Used VBA in a PowerPoint report.
Team language is English.
Worked in a time-shifted work model with colleagues in Bangalore and London.
Technologies used: SQL, PL/SQL, Oracle 12c / Oracle SQL Developer.

Jul 2017 - Dec 2018

1 year 6 months

Hanover, Germany

Software Developer

Association of Statutory Health Insurance Physicians in Lower Saxony

Implemented a layer of VIEWS and SYNONYMS as an abstraction layer for exchanging the data model with downstream applications.
Used VIEWS in Oracle packages and Postgres packages.
Extended the view layer (PL/SQL) with data from the department data mart.
Handled project documentation and tracking in JIRA.
Used agile development with Scrum methodology.
The Association of Statutory Health Insurance Physicians in Lower Saxony supports around 40,000 doctors and ensures medical care.
Technologies used: SQL, PL/SQL, Oracle 11g / Oracle 12c / Oracle SQL Developer.

Feb 2017 - Jun 2017

5 months

Time off / training

Training in SAS-DI / SAS VA Reporting / GIT / C# / R / Markdown.

Jan 2016 - Jan 2017

1 year 1 month

Frankfurt, Germany

SAS-BI Developer / Documentation Specialist

Commerzbank

Documented and ensured regulatory-compliant production deployment of multiple SAS-BI program packages.
Created user documentation for functional testing with HPQC and for using the web frontend.
Prepared documentation for business and system developers: developer handbook, authorization concept, and report creation.
Performed technical HPQC tests and recorded deployments of functionally tested programs.
Created EUCs for the report system context.
Documented existing SAS macros.
Technologies used: HPQC, SharePoint, MS Office, EUC database, SAS-BI.

Jul 2015 - Dec 2015

6 months

Frankfurt, Germany

SAS-zOS to SAS-BI Migration Specialist

Commerzbank

Program migration from SAS-zOS to SAS-BI (on Unix/Windows).
Integration into the new data warehouse / customization and alternative development.
Testing and further development of a technical template that wraps the new system environment.
Modification of about 280 legacy programs and embedding them into the new system template within the team.
Incorporation of new data from the cross-departmental data warehouse / data lake.
Deployment of the programs into the stored-process web environment.
Targeted delivery of result and run-time reports via email.
Conversion of a VBA/SAS combined application to the new system.
Technologies used: SAS-zOS, SAS-BI, Stored-Process Server / Workspace Server, VBA.

Apr 2014 - Jun 2015

1 year 3 months

Wolfsburg, Germany

Database Development

Volkswagen-AG

Database development with zOS-DB2 and Windows MS-SQL Server for data delivery to VMware-ITBM and Bissantz DeltaMaster.
Development of a zOS-DB2 application that standardizes proportional billing data and delivers it on time.
Implementation of the application on MS-SQL Server, considering the import structure for DeltaMaster reporting.
Application documentation including data flow and procedure analysis of the new system.
Support in clarifying customer inquiries.
Creation of import routines in VMware-ITBM and Excel sheets with SQL statements for DB re-import.
Reports on application runtimes with Pacific-Systems SMF Writer.
Technologies used: zOS-DB2, JCL's, OFTP, BETA92/93, QMF, IBM Data Studio, PL/I, PostgreSQL, MS-SQL Server, MS-SSIS, MS-VBA, DeltaMaster, Perl script, Bash, VMware-ITBM, Cobol, Pacific-Systems SMF Writer.

May 2012 - Mar 2014

1 year 11 months

Wolfsburg, Germany

Application-Owner / SAS Developer

Volkswagen-AG

Took over a legacy SAS application and updated its documentation.
Created a user manual.
Researched cost drivers, revenue shortfalls, and causes of faulty data.
Prepared technical application documentation with analysis of data flow and procedures.
Took over the SAS accounting system as application owner, ensuring monthly billing.
Updated the SAS-MXG system to the current version, including VW-specific adjustments.
Technologies used: SAS Windows and remote on z/OS, IBM Host On Demand, ISPF, JCL, BETA92/93, PL/I, MS Office, MS Visio, SAS-MXG, OFTP/RVS, DB2 Host Tools.

Jan 2012 - Mar 2012

3 months

Mönchengladbach, Germany

SAS Data Management / Analyst

Santander Consumer Bank

Created data sets for statistical analysis.
Managed data for the statistics department and ad hoc analyses for products and segments.
Performed frequency and occurrence analyses.
Integrated data with verification using Proc Compare with ODS / ODS Trace.
Documented existing code in the source and in MS Office.
Technologies used: SAS Windows and remote on Unix, SSH, SAS macros, MS Office, MS Visio, MS PowerPoint, SQL.

Sep 2011 - Dec 2011

4 months

Mönchengladbach, Germany

SAS Data Management / KPI Calculation

Santander Consumer Bank

Calculated key figures for the valuation allowance according to HGB and compared them to the corresponding IAS figures.
Developed macros for the monthly production run for controlling.
Conducted extensive pre-tests on multiple data sources.
Created an Excel-VBA front end for SAS routines and parallel remote processing.
Technologies used: SAS Windows and remote on Unix, SSH, sasautos routines and check macros.

Jun 2011 - Aug 2011

3 months

Hanover, Germany

Software Developer / Product Development

CalRes DV

Maintenance and product development of the CalRes SAS-CodeLib (program for managing SAS routines in multi-user operation).
Integration of statistical routines with MySQL and VFront connection for internet data exchange.
Development of CalRes Central (program for data management in occupational therapy and physiotherapy practices - first prototype).
Technologies: SAS, C++, Delphi, Oracle.

Feb 2011 - Mar 2011

2 months

Hanover, Germany

Product Development

CalRes DV

CalRes Central: program for data management in occupational therapy and physiotherapy practices - first prototype.
Technologies: Delphi, Oracle.

Apr 2010 - Dec 2010

9 months

Heddesheim, Germany

SAS Developer

DASTA-GmbH

Analyses for clinical trials (Kaplan-Meier, risk tables, clinical datasets).
Pharmaceutical reporting.
Technologies: SAS 9.2, SAS-GRAPH/ANNOTATE, Windows, UNIX-AIX.

Feb 2010 - Mar 2010

2 months

Software Developer

Druckerei Görich & Weiershäuser

Conversion of an address management system to UTF-8.
Technologies: Delphi, UTF-8.

Aug 2009 - Dec 2009

5 months

Frankfurt, Germany

Plausibility Checks during Data Import

Commerzbank AG

Plausibility checks (Basel II) during data import with report output using Excel XP tagset.
SAS on z/OS / Excel as input frontend.
Systematika / Commerzbank.
Technologies: SAS, z/OS, Excel.

May 2009 - Jun 2009

2 months

Hanover, Germany

Product Development

CalRes DV

CalRes – Simulate: program to generate SAS DataSteps from an Excel workbook.
Enabled SAS command generation without macro knowledge.
Technologies: SAS, Delphi ADO, Access, Delphi OLE.

Jan 2009 - Apr 2009

4 months

Braunschweig, Germany

Software Developer

Thünen-Institut

Frontend built in Delphi for the SAS evaluation system for project grants.
Market analysis at the Thünen Institute.
Technologies: SAS, Delphi, XML, OLE, DevExpress, Zeos, FastReport.

Jun 2008 - Dec 2008

7 months

Braunschweig, Germany

Software Developer

Thünen-Institut

Automated data import system and code management for SAS.
Excel macro for preparing SAS reports.
Mondrian project: OLAP using Mondrian and Firebird for market analysis.
Technologies: SAS, Oracle 10g, Delphi, OLE, Excel VBA, OLAP, Mondrian, Firebird.

Aug 2007 - May 2008

10 months

Braunschweig, Germany

SAS – Statistics and Reporting

Thünen-Institut

Economic indicators / econometric calculations.
Physical calculations / unit conversions.
Project scoring methods.
Technologies: SAS Base, SAS Macro, SAS/Connect, XML, SAS SQL.

Feb 2007 - Jul 2007

6 months

Braunschweig, Germany

Software Developer

Thünen-Institut

Management system for project sheets in Excel with import and export routines for SAS XML/CSV.
Template management; client/server.
Technologies: Delphi, DevExpress, Zeos, Firebird, PostgreSQL, XML.

Dec 2006 - Jan 2007

2 months

Writer / Documentation

Various

No programming.
Writing articles in Word.
Word mail merges.

Mar 2006 - Nov 2011

5 years 9 months

Braunschweig, Germany

SAS Developer

Thünen-Institut

SAS statistics: regional models with factor / cluster / variance analyses.
New edition of a survey form: import macro system with XML output.
Excel VBA, CSV import following guidelines of the participating state banks and authorities.
Technologies: SAS Base, Forecast, Excel VBA, XML.

Jan 2006 - Feb 2006

2 months

Braunschweig, Germany

SAS-TemplateSystem Reporting

Thünen-Institut

PROC Tabulate / PROC Report.
Learning EU reporting requirements.
Technologies: SAS, SAS Base.

Jun 2005 - Sep 2005

4 months

Braunschweig, Germany

Web Developer

Thünen-Institut

Web development with Mambo (now Joomla).
Creating manuals.
Technologies: Joomla, JS, CSS, MySQL, MS Office.

Industry Experience

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

Experienced in Agriculture, Banking and Finance, Automotive, Information Technology, Healthcare, and Government and Administration.

Agriculture

Banking and Finance

Automotive

Information Technology

Healthcare

Government and Administration

Business Area Experience

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

Experienced in Information Technology, Business Intelligence, Research and Development, Quality Assurance, Finance, and Accounting.

Information Technology

Business Intelligence

Research and Development

Quality Assurance

Finance

Accounting

Summary

Originally, I worked in public administration in data management for operational benchmarking and investment evaluation, and then I moved to the private sector where I've now been active for almost 20 years. My past work areas include KPI reporting, data management, and technical and regulatory documentation. For some local clients, I maintain VBA and Delphi projects. I enjoy working in an international team and am familiar with parallel and coordinated workflows as well as time-shifted work processes. I've worked agile in several Scrum projects. I also welcome tasks that don't directly fit my previous work profile.

Skills

Technical Documentation Development, Project Reporting, Quality Control
Sas, Rex, Pl/i, Vba, Delphi, C++, Python, R
Sas Macro, Sql, Xml, Xbrl, Powershell, Bash, Jcl, Perl, Fortran
Sas 9.4, Viya, Ms-sql - Tsql, Ms Access, Mysql, Db2, Postgres, Oracle, Sqlite, Firebird
Excel, Access [Vba], Power Bi 2020 [Dax], Linear Optimization, Skr03, Kpi, Kci
Opentext (Formerly Hp), Opentext-alm, Opentext-qc, Opentext™ Alm Octane
Tso, Ispf, Tso-beta92, Tso-beta93, Tso-rvs
File Management, Log Manager, Output Management, File Transfer
Jcl-iebgener, Jcl-dsntiaul, Jcl-dfsort, Jcl-rex
Xinfo, Twgraph, Jcl-iebcopy, Pacific-smf Writer
Sas 9.4 Foundation, Sas Enterprise Guide, Sas Viya, Sas Mxg, Sas Stat, Sas Access, Proc Report, Proc Sql, Datastep
Qmf Z/os, Qmf Win, Db2 Admin, Data Studio, Db2 Load Utility, Db2 Unload
Pgadmin, Pgdash (Monitoring), Pgmodeller
Visual Studio, Ms Project, Ms Office, Ms-sql Server Management Studio, Ms Visio, Power Bi, Azure, Powershell
Oracle Sql Developer, Oracle Virtualbox
Opentext-alm, Opentext-qc, Opentext™ Alm Octane
Github, Git, Svn
Python, Delphi, Ollama, Zeta Producer, Inno Setup
Embedded Development With Msp430 And Arduino Iot
Handling Oscilloscopes, Measuring Devices, Frequency Generators, Volterra V-one, Soldering Stations
Controls With Miac And Controllino
Knowledge In C, Flowcode, Codesys

Languages

German

Native

English

Advanced

Education

Dr. rer. hort., production horticulture with specialization · Production horticulture

Certifications & licenses

ISTBQ Foundation certificate

ISTBQ Foundation Tester

PostGres Specialist

SAS Advanced Programmer

SAS Certified

Statistics

Experience

Total positions 34

Experience in Agriculture 6 y

Avg length 7 m

Longest experience 5 y 8 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Measurement Data Provision via LoRa, Quality Assurance, Code Review, Training: PostGres SQL

Main industries Agriculture, Banking and Finance, Automotive

Main business areas Information Technology, Business Intelligence, Research and Development

Qualifications

Highest degree Doctorate

Certifications earned 5

Profile

Created

July 2025

Last Update

March 2026

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Frequently asked questions

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

Where is Martin based?

Martin is based in Hanover, Germany.

What languages does Martin speak?

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

How many years of experience does Martin have?

Martin has at least 19 years of experience. During this time, Martin has worked in at least 25 different roles and for 17 different companies. The average length of individual experience is 1 year and 7 months. Note that Martin may not have shared all experience and actually has more experience.

What roles would Martin be best suited for?

Based on recent experience, Martin would be well-suited for roles such as: Measurement Data Provision via LoRa, Quality Assurance, Code Review, Training: PostGres SQL.

What is Martin's latest experience?

Martin's most recent position is Measurement Data Provision via LoRa at End Customer Project.

What companies has Martin worked for in recent years?

In recent years, Martin has worked for End Customer Project, KfW, End customer - migration project, Savings Banks Financial IT, and End Customer Projects.

Which industries is Martin most experienced in?

Martin is most experienced in industries like Agriculture, Banking and Finance, and Automotive. Martin also has some experience in Information Technology, Healthcare, and Government and Administration.

Which business areas is Martin most experienced in?

Martin is most experienced in business areas like Information Technology, Business Intelligence, and Research and Development. Martin also has some experience in Quality Assurance, Accounting, and Finance.

Which industries has Martin worked in recently?

Martin has recently worked in industries like Banking and Finance, Information Technology, and Insurance.

Which business areas has Martin worked in recently?

Martin has recently worked in business areas like Information Technology, Quality Assurance, and Business Intelligence.

What is Martin's education?

Martin holds a Doctorate in Production horticulture.

Does Martin have any certificates?

Martin has 5 certificates. Among them, these include: ISTBQ Foundation certificate, ISTBQ Foundation Tester, and PostGres Specialist.

What is the availability of Martin?

Martin is immediately available full-time for suitable projects.

What is the rate of Martin?

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