Holger Lorenz - Freelance Specialist in Telephone Systems Installation and Communication Technology

Q: Where is Holger based?

Holger is based in Velbert, 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 30 years of experience. During this time, Holger has worked in at least 10 different roles and for 23 different companies . The average length of individual experience is 1 year and 3 months . Note that Holger may not have shared all experience and actually has more experience.

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

In recent years, Holger has worked for Compleo / Innogy , Holger Lorenz Telefonanlagenbau und Bürokommunikation , Trade, Crafts and Hospitality , and IT – Dienstleister .

Q: Which industries is Holger most experienced in?

Holger is most experienced in industries like Information Technology (IT) , Telecommunication , and Energy . Holger also has some experience in Retail , Healthcare , and Utility Services .

Q: Which business areas is Holger most experienced in?

Holger is most experienced in business areas like Information Technology (IT) , Customer Service , and Project Management . Holger also has some experience in Operations , Sales , and Quality Assurance (QA) .

Q: Which industries has Holger worked in recently?

Holger has recently worked in industries like Information Technology (IT) , Energy , and Retail .

Q: Which business areas has Holger worked in recently?

Holger has recently worked in business areas like Information Technology (IT) , Sales , and Customer Service .

Q: What is Holger's education?

Holger attended Xerox GmbH for Information Technology .

Recommended expert

Velbert, Germany

Experience

Apr 2019 - Oct 2022

3 years 7 months

Compleo / Innogy

Advising on the problem management process
Advising on the quality assurance process
Conducting problem reviews and tracking related actions and their implementation
Identifying and documenting ongoing process improvements / optimization potential
Handling tickets in the field of e-mobility, charging stations and wall boxes
Identifying and developing solutions for various inquiries and faults
Commissioning external service providers to troubleshoot charging stations and wall boxes
Correcting POI data by determining the exact locations of charging stations
Providing technical support to foreign technicians, mostly in English
Software used: ICON, Salesforce, eOperate

Nov 2015 - Dec 2024

9 years 2 months

Freelance Specialist in Telephone System Installation and Communication Technology

Holger Lorenz Telefonanlagenbau und Bürokommunikation

Planning, maintenance and installation of telephone systems, ISDN, DSL, All-IP and SIP trunk connections
Administration, maintenance, troubleshooting and repair of PBX systems and extensions
Remote support / phone support
System and network administration
Rollout coordination and subproject management
User support
User training
Laser safety officer
Consultant for LED lighting
PBX systems from Panasonic, Tiptel, Auerswald, Siemens, Agfeo and other manufacturers
Windows client operating systems
VMware Workstation
TeamViewer, Remote Desktop
MS Office, Open Office
Synology NAS
HP Service Center, HP ALM, Remedy
Landesk ticket system
Software distribution with SCCM, Robocopy, etc.

Mar 2015 - Mar 2015

1 month

Dorma

Processing existing incidents and requests (categorization and prioritization) after switching the ticket system

Jul 2014 - Dec 2024

10 years 6 months

Trade, Crafts and Hospitality

Energy consulting and sales of LED lighting

Mar 2013 - Jun 2014

1 year 4 months

Operational rollout planner for Windows 7 / Deputy subproject manager

RWE IT GmbH

Operational rollout planner for Windows 7
Deputy subproject manager
Windows 7 software clearing
Project-based monitoring of the ticket system (categorization and prioritization)
Central communication interface in the project
Coordination of the rollout process according to customer forecast
Customization of the project's rollout tool
Designing and maintaining the software and hardware matrix
Collaboration with order management on new orders
Europe-wide rollout planning in English (e.g. UK, Spain, Poland)
Customer briefing and support for the rollout tool

Jun 2012 - Jan 2013

8 months

Remote

AUMA Riester GmbH & Co. KG

Contact person and remote support / phone support for international locations (English)
Assistance in PC support area: 1st, 2nd and partly 3rd level (Windows 7/XP)
Distribution of data to international locations using Robocopy
Troubleshooting IT devices
Lync client installation and configuration and user training on its functionality
Office 2010 rollout
Software updates
Installation and configuration of telephone systems
Installation and configuration of PCs, notebooks, workstations and printers
Inventorying devices
Procurement and configuration of specialized software

Nov 2011 - Dec 2011

2 months

System and network support

BFS Risk & Collection (ARVATO)

System and network support
Categorization and prioritization of incidents
Infrastructure support
1st, 2nd, 3rd level support (Windows XP)
Server administration Windows 2003
Hardware installation and maintenance

Aug 2011 - Nov 2011

4 months

Essen, Germany

RWE AG

Project support in license management
Checking and researching current / required software versions, data sources, license variants, gathering information and providing sources

Sep 2010 - Dec 2014

4 years 4 months

Heiligenhaus, Germany

Innere Mission Neviges GmbH

Maintenance and servicing of the nurse call system and telephone systems in Heiligenhaus, Velbert, and Velbert-Neviges
On-call service for the nurse call system
Configuration and maintenance of the light call and alarm server for communication with the telephone system for room and emergency calls
Configuration, installation and repair of electronic components of the nurse call system
Configuration of telephone systems: setting up or replacing mobile phones, setting up call forwarding, configuring group call numbers

Jun 2010 - Aug 2011

1 year 3 months

Scriptus Laser Technologie GmbH

Support for Windows 2003 Server
Managing and setting up user accounts
Rights management
Server drive access
Setting up network printers
Adding and removing client PCs
Installing server-based network software
Installing clients with Win7, Vista and WinXP
MS Office installation
Installation of additional software after checking existing licenses
Data recovery after virus and malware infections
Consulting on network backup
Virus and other malware prevention in the network

Apr 2010 - Aug 2011

1 year 5 months

Zimmlinghaus GmbH

Installing office PCs with Windows 7 and Vista
Installing and setting up the network printer (all-in-one device)
Setting up and configuring the inventory and invoicing software
Installing Kärcher spare parts software
Installing MS Office
Installing the internet router with integrated telephone system
Installing additional software after verifying existing licenses

Sep 2009 - Dec 2024

15 years 4 months

IT – Dienstleister

Installing and delivering hardware (PCs, notebooks, monitors, printers, …) for customers
Installing and setting up local and network printers
Installing software
Installing the internet router with integrated telephone system

Mar 2007 - Aug 2008

1 year 6 months

On-site

Substitute and vacation cover in service desk and onsite support

A&O Systems + Services Germany GmbH / WAZ (Westdeutsche Allgemeine Zeitung)

Handling and processing incoming incidents
Co-responsible for providing IT services according to the agreed Service Level Agreements

Apr 2006 - Aug 2008

2 years 5 months

On-site

Substitute and vacation cover in service desk and onsite support

A&O Systems + Services Germany GmbH / Georg Fischer Automotive

Installing, configuring, and delivering various hardware and software
1st and 2nd level support
Handling and processing incoming incidents
Working on Robocopy scripts for data backup
Co-responsible for providing IT services according to the agreed Service Level Agreements

Mar 2006 - Aug 2008

2 years 6 months

Düsseldorf, Germany

Service Engineer

A&O Systems + Services Germany GmbH / Vodafone

1st and 2nd level support
Categorizing and prioritizing incidents
Installing, configuring, and troubleshooting clients running Windows XP
Unattended client installation using NetInstall and other installation methods (PXE boot)
IMAC handling and installing hardware (PCs, notebooks, monitors, printers, …) for around 5000 users
Managing and coordinating external service technicians
Co-responsible for providing IT services according to the agreed Service Level Agreements
Assisting in coordinating and implementing hardware and software rollouts
Co-responsible for asset maintenance in the customer's Configuration Management Database
Co-responsible for managing and enforcing the customer's license requirements and software asset management
Monitoring manufacturer warranty processes and ensuring compliance according to customer requirements

Mar 2005 - Aug 2008

3 years 6 months

On-site

Onsite support floater and vacation cover

A&O Systems + Services Germany GmbH / SKF Sealing Solutions GmbH

Handling and processing incoming incidents
Installing, configuring and delivering various hardware and software (Windows 2000 and Windows XP)
Responsible for changing backup tapes
Jointly responsible for providing IT services according to agreed service level agreements
Ensuring license compliance according to customer requirements and available licenses

Apr 2004 - Mar 2006

2 years

Service Engineer

A&O Systems + Services Germany GmbH / Gothaer Versicherung

Installation, configuration and delivery of hardware and software
1st and 2nd level support
New installations with SCCM and PXE boot
Performing IMACD tasks for IT devices and related work (e.g., network patching, desk cabling, etc.)
Planning and performing moves
Rollout coordination and sub-project manager for a nationwide hardware rollout
Collaborating on building a new software asset database to determine required software licenses

Jun 2003 - Apr 2004

11 months

Service Engineer

A&O Systems + Services Germany GmbH / Johnson Controls Automotive Experience

Setting up, starting and monitoring unattended client installations with SCCM and PXE boot
Installing additional software after checking available licenses
Delivering and installing hardware (PCs, notebooks, monitors, printers, etc.)
Performing IMACD tasks for IT devices and related work (e.g., network patching, desk cabling, etc.)
Jointly responsible for delivering IT services according to agreed service level agreements

Nov 2001 - Jun 2003

1 year 8 months

Düsseldorf, Germany

Service Engineer

A&O Systems + Services Germany GmbH / Sony Ericsson Mobile Communications

Responsible for hardware and software asset management and its maintenance at the Düsseldorf site
Handling and processing incoming incidents
Responsible for changing backup tapes
Jointly responsible for delivering IT services according to agreed service level agreements

Aug 2001 - Nov 2001

4 months

Cologne, Germany

Rollout technician

A&O Systems + Services Germany GmbH / Bankhaus Sal. Oppenheim

Converting network cabling from Token Ring Type 1 to Ethernet throughout the entire bank
Upgrading hardware (printers, computers, and other network devices) from Token Ring to Ethernet

Sep 1999 - Aug 2001

2 years

Germany

Service Engineer

A&O Systems + Services Germany GmbH / Mannesmann D2 Mobilfunk Shops

Support of D2 shops across the entire NRW region
Execution and processing of incoming incidents
Installation, configuration and delivery of hardware and software
Installation of shop clients and servers with Windows 2000, Windows XP and Windows 2000 Server
Jointly responsible for delivering IT services according to the agreed service level agreements

Jan 1999 - May 1999

5 months

Technical Field Service Technician

XEROX GmbH

Sep 1995 - Jan 1999

3 years 5 months

Apprenticeship as Communications Electronics Technician (Information Technology specialization)

XEROX GmbH

Sep 1983 - Jul 1986

2 years 11 months

Machine Fitter

Benz & Hilgers GmbH, a subsidiary of Rheinmetall AG

Languages

German

Native

English

Advanced

Education

Sep 1995 - Jan 1999

Xerox GmbH

Communications Electronics Technician, specializing in Information Technology · Information Technology · Germany

Sep 1983 - Jul 1986

Benz & Hilgers GmbH, Tochterfirma der Rheinmetall AG

Machine Mechanic · Machine Mechanic · Germany

Profile

Created

January 2024

Last Update

February 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 Velbert, 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 30 years of experience. During this time, Holger has worked in at least 10 different roles and for 23 different companies. The average length of individual experience is 1 year and 3 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: Freelance Specialist in Telephone System Installation and Communication Technology, Operational rollout planner for Windows 7 / Deputy subproject manager, System and network support.

What companies has Holger worked for in recent years?

In recent years, Holger has worked for Compleo / Innogy, Holger Lorenz Telefonanlagenbau und Bürokommunikation, Trade, Crafts and Hospitality, and IT – Dienstleister.

Which industries is Holger most experienced in?

Holger is most experienced in industries like Information Technology (IT), Telecommunication, and Energy. Holger also has some experience in Retail, Healthcare, and Utility Services.

Which business areas is Holger most experienced in?

Holger is most experienced in business areas like Information Technology (IT), Customer Service, and Project Management. Holger also has some experience in Operations, Sales, and Quality Assurance (QA).

Which industries has Holger worked in recently?

Holger has recently worked in industries like Information Technology (IT), Energy, and Retail.

Which business areas has Holger worked in recently?

Holger has recently worked in business areas like Information Technology (IT), Sales, and Customer Service.

What is Holger's education?

Holger attended Xerox GmbH for Information Technology.

What is the availability of Holger?

Holger is immediately available full-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.