Your expert for ICT

Our secret of success? We listen carefully and offer our customers the right solution for every ICT problem – creative and reliable. We do not accept standard answers! Neither do you? Then you have made the right choice with us.

Who we are

Welcome to ITENOS! We are an independent IT service provider affiliated with the Deutsche Telekom AG group. When it comes to ICT, we are a highly competent and reliable partner – especially for SMEs.

But let’s start at the beginning: it all started with 12 creative minds who set out to change the IT world. A small start-up, headquartered in Bonn, Germany, and in their briefcases a sophisticated portfolio of virtual data networks and high-quality premises for network nodes and data centers – all tailor-made and highly customized. ITENOS was born. That was in 1993. Since then, a lot has happened: ten years later, the team has already increased tenfold. Today, the ITENOS family has grown to around 220 employees, almost 20 times the manpower. We are growing continuously and developing our expertise, our portfolio and our workforce all the time. This is one of the main reasons why ITENOS has grown into a serious player in the industry, has established itself as a reliable IT and telecommunications company and is now one of the top ICT employers in Germany.

As an IT service provider and telecoms expert we continue to plan, implement and operate individual custom solutions for data centers and IT infrastructure, connectivity, access control and in the area of managed services. Of course, this is all based on state-of-the-art technologies from selected business partners and our own network infrastructures and data centers at different locations throughout Germany – whether in Frankfurt am Main, Düsseldorf, Hamburg, Hamburg or Stuttgart. And we never deviate from the high standards of data protection and security that Germany is known for. In fact, ITENOS relies to a 100 percent on ISO-certified processes – both in matters of IT and cloud security, and in our quality and IT service management. als auch hinsichtlich unseres Qualitäts- und IT-Service-Managements.

But it’s not only our high quality standards that make us special, but above all, our proximity to the customer. We listen closely: what do our customers need? What requirements do they have? What issues and challenges are they dealing with? These are our starting points to seek the right solution – with imagination and reliability. We’re not satisfied with standard answers, are you? No? Then look no further.

Neun Gründe für eine Zusammenarbeit mit ITENOS

#1 T1 carrier
Our carrier-neutral and cloud-neutral platform at Kleyerstraße 90 in Frankfurt gives you direct access to Tier 1 networks as well as to DE-CIX, the world's largest internet exchange, with more than 15,000 interconnects and over 900 partners.
#2 Deutsche Telekom Group
As part of the Deutsche Telekom Group, ITENOS meets the strictest data protection requirements, in accordance with the governance rules. At the same time, our solutions are based around the group's proven hardware technology.
#3 IT made in Germany
As a German IT service provider with data centers in Germany, we protect your data in accordance with the world's strictest data protection and security requirements.
#4 Certified IT
All of our solutions and processes have been tested by independent, professionally relevant organizations – from our ISO certifications and EU-GDPR requirements to the highest VdS qualification.
#5 Zero outage
Maximum availability and stability for your IT – this is our promise. And it's why we are part of Telekom's TÜV-certified zero-outage program and follow a strict zero-defect strategy.
#6 ITIL standard
In IT service management, we rely on the ITIL certification of our employees. This certification forms the basis for both professional IT services and successful cooperation with your IT department.
#7 24/7 support
To ensure the smooth operation of all ICT services, fast assistance in an emergency is a must. In addition to 24/7 monitoring, the ITENOS team is therefore at your service around the clock.
#8 Energy efficiency
With modern technologies and sophisticated structural solutions, we ensure optimal rack air conditioning, efficient operation of servers and hardware, and low long-term energy costs.
#9 Strong partner
We are convinced that high-quality solutions depend on the right products – and the people behind them – which is why we work only with selected partners such as VMware, Cisco and Dell.



A project community consisting of eight pioneers set itself the goal of founding a company, which was to develop and manage tailored, virtual data networks based on Datex-P, to provide locations for the network infrastructure of businesses, and to offer the best service possible.


The International Telecom Network Operation Services, or I.T.E.N.OS. GmbH for short, is officially entered into the German commercial register on the 16th of November 1993. The three founding parties are the partners DETECON GmbH, T.D.T. GmbH and GRICON GmbH.


After successfully entering its market, ITENOS GmbH’s staff already grows substantially during its first years, to 27 employees. DETECON takes over as sole shareholder.


ITENOS becomes a full subsidiary of T-Data and therefore a member of the Deutsche Telekom AG group. In addition to data networks, equipment housing, carrier network and interconnect, ITENOS expands its portfolio, among other areas, with business SMS solutions as well as telematics including facility management and access solutions.


After ten years in the market, ITENOS’ workforce had already increased tenfold, to 120 employees, documenting a healthy growth, as do the numerous field offices in the German cities of Münster, Berlin, Hamburg, Magdeburg, Frankfurt, Trier and Erlangen.


Under the leadership of Paul Hülsmann and Friedrich-Rainer Bierwirth, ITENOS further expands its business areas: Now, its customers can also rely on ITENOS’ expertise in the areas of housing services, hosting services, connect services and telematics.


Bernd Mitternacht and Siegfried Pleiner become the managing directors of the by now 165 employee-strong company. To keep up with the changes in the market, ITENOS’ portfolio is consolidated into the areas of cloud services, housing, and networks.


A new differentiation towards the areas of data centers (connectivity, colocation and housing in Germany), managed IT services (planning, development and operation of hybrid managed hosting and IaaS solutions), and networks (IP network solutions for businesses with a branch structure) already mirrors the structure of ITENOS’ business units today.


For its 25th anniversary, ITENOS can be proud to have established itself as a renowned institution in the IT and telecommunications sector. Around 220 employees comprise the team one of the best ICT employers in Germany, where they continue to further develop its portfolio.

Overview of contacts

Lievelingsweg 125
53119 Bonn
T: 0228 7293-0
Bernd Ebert
Manager ISO Systems
T: +49 228 7293-4580
Oliver Hundrißer
Specialist distribution BU IT
Kai Müller
Head of sales
Martin Häußler
Head of ProtectService
Thomas Wolpert
Specialist distribution BU DataLogistIX
Bernd Weber
Product Manager Business Unit Networks
Frank Jarzyna
Specialist distribution BU Networks
Arif Polat
Market Development & Interconnection Strategy Manager
Ingo Oestreicher
Specialist distribution BU Networks
Patrick Glawe
Strategic procurement
Wolfgang Heck
Head of Business Unit Networks
Gabriel Willigens
Head of Business Unit Data LogistIX
Klaus Petersen
Specialist distribution BU IT
Contract Management
Iris Hopp
Contract Management Professional
T: +49 228 7293-4711
Marita Hilpmann
Contract Management Professional
T: +49 228 7293-4715
Oliver Zigan
Contract Management Professional
T: +49 228 7293-4010
Data Privacy
Philipp Alsdorf
Data protection coordinator
T: +49 228 7293-4025
Jörn Krinelke
Specialist distribution BU IT
Ulrich Nagel
Specialist distribution BU DataLogistIX
Christian Weiland
Specialist distribution BU Data Logistics
Human Ressources
Irina Zindikus
HR Officer
T: +49 228 7293-4632
Claudia Rinscheid
HR Officer
T: +49 228 7293-4631
Rüdiger von Ledebur
Head of Human Resources
T: +49 228 7293-4630
Jule Carstensen
HR Officer
T: +49 228 – 7293 4633
Information Security
Alexander Schmitz
Chief Security Officer
Managed Services
Jörg Winkhold
Head of sales
Jürgen Pieper
Head of business development
T: +49 228 7293-334
Ralf Sperner
Head of Business Unit IT
Marketing / PR
Marlies Büttgen
Marketing Officer
T: +49 228 7293-0
Ngoc Son Ho
Strategic Marketing Officer
T: +49 228 7293-0
Daniela Freistein
Procurement Officer
Tim Mettbach
Head of procurement & facility management


We keep our promises regarding quality: numerous certifications confirm the successful development of various management systems as defined in ISO standards. These accreditations are updated annually. The independent certification bodies DQS and the DEKRA certify on a regular basis that all audited processes are compliant with international standards – whether in the areas of information and cloud security, in service, quality or energy management. The same applies to data protection: as an IT service provider with high quality standards, it goes without saying that our data privacy management is also certified and conforms to the requirements of the EU-GDPR.