Frank Bergmann - Linux Expert, Engineering/Development/Security, C/Java/Python/JS

Q: Where is Frank based?

Frank is based in Herford, Germany .

Q: What languages does Frank speak?

Frank speaks the following languages: German (Native), English (Advanced), Dutch (Elementary) .

Q: How many years of experience does Frank have?

Frank has at least 29 years of experience. During this time, Frank has worked in at least 18 different roles and for 20 different companies . The average length of individual experience is 1 year and 8 months . Note that Frank may not have shared all experience and actually has more experience.

Q: What is Frank's latest experience?

Frank's most recent position is System Engineer at Frequentis Comsoft .

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

In recent years, Frank has worked for Frequentis Comsoft , InConTra GmbH , New Elements GmbH , Henkel (via Valtech) , and Frequentis Comsoft (Defense) .

Q: Which industries is Frank most experienced in?

Frank is most experienced in industries like Information Technology , Media and Entertainment , and Chemical . Frank also has some experience in Cosmetics , Aerospace and Defense , and Retail .

Q: Which business areas is Frank most experienced in?

Frank is most experienced in business areas like Information Technology , Product Development , and Operations . Frank also has some experience in Quality Assurance , Customer Service , and Human Resources .

Q: Which industries has Frank worked in recently?

Frank has recently worked in industries like Information Technology , Media and Entertainment , and Chemical .

Q: Which business areas has Frank worked in recently?

Frank has recently worked in business areas like Information Technology , Product Development , and Quality Assurance .

Recommended expert

Herford, Germany

Check rate

Experience

May 2026 - Present

1 month

System Engineer

Frequentis Comsoft

Migrate company software to RHEL10
Development in Bash, Python, C, Ansible

Mar 2026 - Mar 2026

1 month

Trainer

InConTra GmbH

Delivered seminar "Network Basics" using Raspberry Pi 4

Mar 2026 - Mar 2026

1 month

Trainer

InConTra GmbH

Delivered seminar "Linux Basics" using Raspberry Pi 4

Nov 2025 - Nov 2025

1 month

Hybrid

Linux Trainer

New Elements GmbH

Delivered a two-week online/hybrid course preparing participants for LPIC-2 certification

Mar 2025 - Mar 2025

1 month

Consultant / Systems Engineer

Henkel (via Valtech)

Provided consulting and troubleshooting for infrastructure issues
Worked with CIFS, Kerberos and autofs integrations

Nov 2024 - Nov 2024

1 month

Trainer

InConTra GmbH

Delivered seminar "Security Basics"

Jul 2024 - Jul 2024

1 month

Trainer

InConTra GmbH

Delivered seminar "Security Basics"

Jun 2024 - Jul 2024

2 months

Consultant

Henkel (via Valtech)

Provided consulting and troubleshooting for infrastructure and system topics

Jun 2024 - Jun 2024

1 month

Trainer

InConTra GmbH

Delivered seminar "Network Basics" using Raspberry Pi 4

May 2024 - May 2024

1 month

Trainer

InConTra GmbH

Delivered seminar "Linux Basics" using Raspberry Pi 4

Feb 2024 - May 2026

2 years 4 months

System Engineer

Frequentis Comsoft (Defense)

Linux systems engineering
FreeIPA and LDAP/Kerberos administration and integration
Development in Bash, Python and C
Work according to BSI, NCSC, CIS and Common Criteria requirements
Oracle database usage and support

Dec 2023 - Dec 2023

1 month

Linux Trainer

New Elements GmbH

Delivered Linux Systems Administration advanced course

Nov 2023 - Nov 2023

1 month

Linux Trainer

New Elements GmbH

Delivered "LPIC-1: FastLearn" preparation course

Oct 2023 - Oct 2023

1 month

Linux Trainer

InConTra GmbH

Delivered seminar "Network Basics" (Linux + Raspberry Pi 4)

Oct 2023 - Oct 2023

1 month

Linux Trainer

New Elements GmbH

Delivered "Red Hat Linux Basic Administration" course

Sep 2023 - Sep 2023

1 month

Linux Trainer

New Elements GmbH

Delivered "Unix/Linux Shell Programming for Beginners" course

Jan 2023 - Feb 2024

1 year 2 months

Linux Backend

DSA Daten- und Systemtechnik

Developed backend components in Bash and C++ on Linux
Worked with X.509 certificates, RPM and Ansible, OBS and TLS/OCSP
Integrated and managed LDAP, Keycloak and Elastic Beat
Used Git and Bitbucket for version control

Jan 2023 - Jan 2023

1 month

Linux Trainer

New Elements GmbH

Delivered "Linux Systems Administration" crash course

Dec 2022 - Present

3 years 6 months

Specialist Administration Data Management

Axel Springer Syndication

Service and support of DIGAS and related tools
Work with DBMS, shell scripting, Perl, LDAP

Nov 2022 - Nov 2022

1 month

Linux Trainer

New Elements GmbH

Delivered preparation course for LPI Linux Essentials certification

Sep 2022 - Sep 2022

1 month

Linux Trainer

New Elements GmbH

Delivered a two-week online course preparing participants for LPIC-1 certification

May 2022 - May 2022

1 month

Linux Trainer

New Elements GmbH

Delivered a two-week online course preparing participants for LPIC-1 certification

Mar 2022 - Mar 2022

1 month

Trainer

New Elements GmbH

Delivered one-day course "Working with Git and Github"

Jan 2022 - Mar 2023

1 year 3 months

Software developer (Java)

ElectronicPartner

Developed a B2B shop based on SAP Commerce / Hybris (backend and frontend)
Implemented backend logic and frontend features using Java 11, Spring Core/MVC/Security, Javascript and Angular
Used Python for auxiliary tooling and scripting
Employed Docker and Git for containerization and version control

Jan 2022 - Jan 2022

1 month

Linux Trainer

New Elements GmbH

Delivered Linux course "LPI GRD1"

Dec 2021 - Dec 2021

1 month

Linux Trainer

New Elements GmbH

Delivered preparation course for LPI Linux Essentials certification

Oct 2021 - Dec 2022

1 year 3 months

Consultant Documentation Tools

msgGillardon

Analyzed existing documentation tools including Adobe RoboHelp, Docbook XML and Asciidoc
Planned and executed migration from Adobe RoboHelp to Asciidoc
Worked with HTML and XML, shell scripting, C and Git

Oct 2021 - Jun 2022

9 months

Support B2C-Shop

T-Systems MMS

Supported a B2C shop based on SAP Commerce / Hybris (backend and frontend)
Worked with SAP Commerce Cloud, Selenium and Podman
Used Java 11, Spring Core/MVC/Security, Javascript, Angular and Python

Oct 2021 - Oct 2021

1 month

Linux Trainer

New Elements GmbH

Delivered a two-week online course preparing participants for LPIC-1 certification

Jun 2021 - Jun 2021

1 month

Linux Trainer

New Elements GmbH

Delivered a two-week online course preparing participants for LPIC-1 certification

Feb 2021 - Feb 2021

1 month

Linux Trainer

New Elements GmbH

Delivered a two-week online course preparing participants for LPIC-1 certification

Jan 2021 - Sep 2021

9 months

Software developer (Java)

T-Systems MMS

Developed a B2B shop with SAP Commerce / Hybris (backend and frontend)
Worked with SAP Commerce Cloud, Selenium and Podman
Implemented features using Java 11, Spring Core/MVC/Security, Javascript, Angular and Python

Sep 2020 - Sep 2020

1 month

Linux Trainer

Diebold Nixdorf

Delivered one-week training on Linux basics
Covered topics comparable to LPIC-1 plus customer-specific topics

Apr 2020 - Nov 2025

5 years 8 months

Bonn, Germany

Software developer C/C++

IT company near Bonn

Developed SSL/TLS functionality in C/C++ on Linux using the mbed TLS library for a security solution to isolate malware
Implemented PKCS #11 integrations with secure elements and HSMs, including Yubikey
Set up and maintained TeamCity for cross-platform builds using CMake and Conan
Used Git and created package builds for Debian
Implemented and maintained automated tests with Selenium/Selenide

Jan 2020 - Sep 2022

2 years 9 months

Software developer (Certified SAP Hybris Core Developer) and consultant

Henkel (via Valtech)

Continued and extended existing SAP Hybris-based projects
Up to March 2020 worked full time, afterwards in part-time setups
Responsible for monitoring, documentation and consulting around Hybris-based solutions
Used Java 11, Spring Core/MVC/Security, Javascript, Angular and Python
Employed Docker, Podman, Git and Bitbucket
Built on previous Valtech/Henkel collaboration that started in 01/2015, with a total project duration of about 7.75 years

Jan 2015 - Dec 2019

5 years

Software developer (Certified SAP Hybris Core Developer) and consultant

Henkel (via subcontractor)

Upgraded PIM from Hybris 4.3 to 5.4 on Oracle DBMS, including customer-specific extensions
Designed and implemented new PIM data models for business units "LHC" and "BC"
Developed an AngularJS-based PIM Export Cockpit
Implemented PIM imports from EDW and XLSX, including retailer-specific export formats (PoC)
Integrated Channel Advisor / Buy Now and automated imports from SAP
Integrated external systems such as Spirit Of Capris, AEM (via REST API), Brandbank and SmartLabel
Upgraded PIM from Hybris 5.4 to 6.5 and later Hybris from 6.5 to 1905
Harmonized data models for LHC/BC with six product layers (vs. Hybris default of two)
Implemented custom PIM backup for LHC/BC and added new BU "BProf" including B2B shop export
Drove PIM CountryRollout and migration to Hybris BackOffice
Acted as consultant, architect and developer for networks/proxies/firewalls, databases, OS/servers, applications, interfaces and UI
Used Agile development and Scrum practices
Technologies and tools: AngularJS, Apache Proxy, Beanshell, Bitbucket, C, Confluence, CSS, Docker/Podman, documentation tooling, Dynatrace, Expect, Git, Groovy, HTML, Java 7-11, Javascript, JBehave, Jenkins, Jira, JUnit, Linux, Kibana/Logstash (ELK), Mockito, Nagios, Oracle, Python, SAP Hybris, Selenium, Solr, Spring, OAuth2, Tanuki Wrapper (Hybris), TDD, Thucydides / Serenity BDD, Tomcat, ZKoss, SLES/RHEL

Dec 2014 - Dec 2019

5 years 1 month

Software developer (Certified SAP Hybris Core Developer) and consultant

Emmet Software Labs

Worked on various Java-based projects (Java 7-11)
Delivered SAP Hybris-related projects for Henkel and Medewo

Aug 2013 - Nov 2014

1 year 4 months

Systems administrator / systems developer

Re-developed the web frontend of a customer portal:
Used PHP framework Symfony2
Implemented styles with SCSS/SASS
Implemented frontend behavior with Javascript, jQuery, jQueryUI, OpenStreetMap and OpenLayers
Integrated with backend via REST API (PostgreSQL)
Performed systems administration for web and mail servers, firewall (Shorewall) and VPN

Mar 2012 - Jul 2013

1 year 5 months

Germany

Systems administrator

Meyle+Müller GmbH & Co. KG

Operated a data center with Linux, Solaris, Mac and Windows servers
Managed VMWare virtualization for Linux and Windows
Ran Tomcat and Java applications (Java 5-6)
Provided file services via NFS, CIFS (Samba) and AFP (Helios) on Linux and Solaris
Managed VPN and IPsec
Administered MySQL (Cluster configuration) and installed Oracle DBMS
Built high-availability solutions with Red Hat Cluster and SAN with Fibre Channel multipath
Implemented backup solutions with Bacula and Veeam
Operated a Spacewalk server with RHN (Satellite) customization
Created custom RPM packages for in-house software
Used various ITIL-related tools such as ticket systems
Enhanced internal document management system (Dokuwiki)
Introduced an internal messaging server (XMPP/Jabber)
Used and further developed HTTP/UDP-based remote monitoring in C
Served six months as team lead of a four-person team

Nov 2007 - Feb 2012

4 years 4 months

Espelkamp, Germany

Systems administrator / systems developer

Mittwald CM Service

Administered and developed for several hundred servers
Designed, installed and operated a Nagios-based monitoring system
Monitored hosts, switches and SANs
Developed custom Nagios plugins in C
Implemented a lightweight HTTP server to replace Net-SNMP for monitoring (approx. 200x speedup)
Developed new UDP server and client software for monitoring with multi-checks (5x–20x speedup)
Created various high-performance C tools for systems administration
Wrote technical documentation and articles
Acted as instructor/coach for Linux, systems administration, performance analysis and forensics, security, server configuration, MySQL optimization and disaster recovery
Developed custom MySQL backup and recovery software supporting DB/table-level backup and restore, delta and full backups, filesystem cleanup, special handling of TYPO3 and Magento tables, automatic repair of defective tables, InnoDB file shrinking, timestamp-based recovery, charset correction and backup monitoring
Implemented scripts and tools to increase reliability of LAP/LAMP servers, including load limiting
Implemented load monitoring in Python for high-speed monitoring of large networks
Created patches for TYPO3 and extensions, plus custom TYPO3 monitoring
Implemented search server for TYPO3 using Apache Solr on Jetty and Tomcat
Built temperature-monitoring circuits with DS1820 (Digitemp) integrated into Nagios-based monitoring
Administered and monitored network devices such as switches and F5 load balancers

Aug 2004 - Present

21 years 10 months

IT Consulting

Self employment

Provided IT consulting and software development, including SAP Hybris core and LPIC-3-related work
Performed systems administration and systems development, mainly on Linux, with a focus on network protocols and IT security
Delivered web hosting based on Apache, fnord and Zope
Implemented virtualization with Xen, OpenVZ, KVM and VMWare
Performed live migration of a Novell network and Novell file server to Linux
Installed an iSCSI SAN system on Debian including required kernel patches
Developed DNS software using command-line tools and a fast HTTP server for DynDNS
Implemented a DNS blacklist solution for spam protection
Developed a Red Hat-based Linux distribution for antivirus use (~2003)
Developed a fli4l-based Linux distribution for routers
Developed and ported software for AVR- and MIPS-based routers using cross-compilers and Buildroot/OpenWRT
Implemented DRBD with Heartbeat as a simple HA solution
Contributed occasionally to various open-source projects
Created patches and extensions for miscellaneous software packages
Developed a bot-safe contact form in PHP without captchas, demonstrating the existence of JS interpreters in bots and the ineffectiveness of email address scrambling in JS (around 2008/2009)
Evaluated web server setups for Magento: Apache CGI, Apache mod_php, Apache PHP-FPM, Cherokee PHP-FPM, Nginx PHP-FPM and fnord CGI with CMS patches
Gave talks on systems administration and systems development (e.g. at OpenRheinRuhr)
Developed a small HTTP server as a fork of fnord
Performed migration (2013/2014) of a Microsoft SBS server to RHEL plus Kolab Groupware for a glass wholesaler
Created custom RPM repositories for RHEL and Fedora
Delivered trainings and workshops on Git, Linux and software development on Linux
Implemented small developments for ODROID GO (Espressif ESP32)

Apr 2004 - Oct 2004

7 months

Cologne, Germany

Systems Engineer

Mascott GmbH & Co. KG

Migrated a productive DBMS for a medium-sized company
Upgraded SCO UNIX and Informix DBMS to current versions

Nov 2000 - Jun 2004

3 years 8 months

Sankt Augustin, Germany

freelance, Software developer

IMK GMD/FhG

Delivered various small projects in Java 1.1–1.3, Python and Jython for digital TV (DVB)
Developed C++ software for real-time video digitization and streaming based on Dicas MPEG4 encoder and Linux V4L API

Nov 1997 - Oct 2000

3 years

Sankt Augustin, Germany

Student assistant, part time

IMK GMD

Developed a Java-based EPG with the same specifications as the OpenTV-based EPG of ARD, connected directly to an Oracle DB
Co-developed an EPG based on MHP (Multimedia Home Platform, DVB standard)
Implemented various small Java applications for DVB and MPEG-2 on Sun Solaris (Java 1.0–1.1)

Industry Experience

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

Experienced in Information Technology, Media and Entertainment, Chemical, Cosmetics, Aerospace and Defense, and Retail.

Information Technology

Media and Entertainment

Chemical

Cosmetics

Aerospace and Defense

Retail

Business Area Experience

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

Experienced in Information Technology, Product Development, Quality Assurance, Operations, and Customer Service.

Information Technology

Product Development

Quality Assurance

Operations

Customer Service

Skills

Core Competencies:

Sap Hybris (>10 Years), Unix/Linux (>30 Years)
Software Development
Systems And Networks
Security

Technical Expertise:

Os: All Apple Operating Systems, All Linux Distributions From Openwrt To Red Hat, Many Unix Systems (Ibm, Hp, Oracle Etc.), Arduino, Embedded Os
Architectures: Intel 32/64, Ibm/Motorola Power, Motorola 68k, Mips, Arm Etc.
Programming Languages: Java 1-17, C, Python, Javascript, Groovy, Beanshell, C++, Php, Perl, Tcl/Tk/Expect, Various Assemblers, Older High-Level Languages
Markup: Html/Css, Xml, Sgml, Latex, Docbook, Md, Asciidoc
Libraries And Frameworks: Spring Core/Mvc/Security, Angularjs, Jquery/Jqueryui, Scss/Sass, Openssl, Libressl, Mbed Tls, Zk/Zkoss, Symfony
Interfaces: Rest, Soap, Openlayers, Openstreetmap, Cgi Incl. Php-Fpm
Web Servers: Apache, Tomcat, Jetty, Lighttpd, Cherokee, Nginx, Zope Etc.
Dbms: Mysql, Mariadb, Oracle, Postgresql, Sqlite, Hsqldb, Informix
Applications: Sap Hybris, Solr, Confluence, Jira, Jenkins/Teamcity, Eclipse, Sonarqube, Lamp, Helios (Afp), (Openwrt) Buildroot, Cmake, Conan, Ansible
Version Control: Sccs, Rcs, Cvs, Svn, Git, Bitbucket, Github, Gitlab
Testing: Junit, Mockito, Selenium/Selenide, Jbehave, Thucydides/Serenity Bdd, Sput
Protocols/Standards: Cifs/Smb, Nfs, Ldap/Kerberos, Ssh, Http/Https, Tftp, Ftp, Smtp, Imap4, Pop3, Dns, Snmp, Ip/Tcp/Udp/Icmp, San/Fc/Multipath, Openvpn/Ipsec, Scsi & Iscsi, Xmpp, Dvb, Fido2, Pkcs #11, Se/Hsm
Virtualization: Vmware, Xen, Kvm, Openvz/Virtuozzo, Uml, Docker/Podman
Monitoring: Nagios/Icinga, Custom Plugins, Prometheus, Grafana
Bootloaders: Grub, Grub Legacy, U-Boot, Syslinux, Lilo, Bootx, Loadlin
Security: See Separate Document
Electronics: Analog And Digital Electronics/Embedded Hardware, Design/Layout, Prototype Manufacturing

Languages

German

Native

English

Advanced

Dutch

Elementary

Education

Studies

Certifications & licenses

Certified Expert Trainer 2022

NewElements / it-schulungen.com

Certified SAP Hybris V5 Core Developer

LPIC-303 (Security)

Linux LPIC-3 (Core)

Novell CLA (Certified Linux Administrator)

Novell

Novell DCTS (Data Center Technical Specialist)

Novell

Statistics

Experience

Total positions 44

Experience in Information Technology 25 y

Avg length 1 y 6 m

Longest experience 21 y 9 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles System Engineer, Trainer, Linux Trainer

Main industries Information Technology, Media and Entertainment, Chemical

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Certifications earned 6

Profile

Created

May 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Frank based?

Frank is based in Herford, Germany.

What languages does Frank speak?

Frank speaks the following languages: German (Native), English (Advanced), Dutch (Elementary).

How many years of experience does Frank have?

Frank has at least 29 years of experience. During this time, Frank has worked in at least 18 different roles and for 20 different companies. The average length of individual experience is 1 year and 8 months. Note that Frank may not have shared all experience and actually has more experience.

What roles would Frank be best suited for?

Based on recent experience, Frank would be well-suited for roles such as: System Engineer, Trainer, Linux Trainer.

What is Frank's latest experience?

Frank's most recent position is System Engineer at Frequentis Comsoft.

What companies has Frank worked for in recent years?

In recent years, Frank has worked for Frequentis Comsoft, InConTra GmbH, New Elements GmbH, Henkel (via Valtech), and Frequentis Comsoft (Defense).

Which industries is Frank most experienced in?

Frank is most experienced in industries like Information Technology, Media and Entertainment, and Chemical. Frank also has some experience in Cosmetics, Aerospace and Defense, and Retail.

Which business areas is Frank most experienced in?

Frank is most experienced in business areas like Information Technology, Product Development, and Operations. Frank also has some experience in Quality Assurance, Customer Service, and Human Resources.

Which industries has Frank worked in recently?

Frank has recently worked in industries like Information Technology, Media and Entertainment, and Chemical.

Which business areas has Frank worked in recently?

Frank has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.

What is Frank's education?

Frank attended education in Studies.

Does Frank have any certificates?

Frank has 6 certificates. Among them, these include: Certified Expert Trainer 2022, Certified SAP Hybris V5 Core Developer, and LPIC-303 (Security).

What is the availability of Frank?

Frank will be available from August 2026.

What is the rate of Frank?

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