About us

Your professional partner in
entire IT area

Do you know the potential of your existing IT infrastructure? Is it best suited to your activities and needs? Is it protected against intruders such as viruses, worms and Trojans?

We at Weihrich Informatik advise you on your strategic IT issues, we show you how to achieve maximum productivity with minimum IT operating costs and what precautions you need to take to ensure that your systems are virus-free and your employees work worry-free. And always with one focus: your success!

Thomas Weihrich
Owner and managing director

Thomas Weihrich Informatik GmbH

Sustainable, competent, fast

Your competent, reliable partner in all IT matters

Weihrich Informatik is one of the largest IT service providers in the Kreuzlingen region with a long-standing customer base in Eastern Switzerland/German-speaking Switzerland. We advise companies on their IT strategy and implement solutions that are optimally tailored to customers and their employees. The focus is on personal consulting: together with the customer, solutions are developed that sustainably optimize overall IT costs and are convincing in the long term – through services and products that meet the highest requirements. Weihrich Informatik operates and maintains the systems and offers users professional support. You can download an information brochure here.

We are ISO certified

Weihrich Informatik is an ISO 9001 and 27001 certified company.

With the certification according to 9001, Weihrich Informatik underlines its high standards of efficient quality management, process orientation and transparency. With the established quality management system, work processes are continuously improved – for the benefit of all customers.

The 27001 certification for information security is particularly important. The audited information security management system (ISMS) emphasizes Weihrich Informatik’s claim when it comes to the security, confidentiality and availability of data in the digital and physical world.

Weihrich Informatik now employs more than a dozen people, actively cultivates partnerships with renowned companies and has already received the coveted Studerus Project Award several times for its innovative IT solutions.

Since its foundation, our company has been based in Kreuzlingen, Canton Thurgau, on Lake Constance. Our offices are located at Alleestrasse 20.

We are a member of

Innovative projects and commitment to young professionals

In 2012, the company was honored with the Studerus Project Award, an award presented annually by Studerus AG for an unusual project in the world of information technology. In this case, for the planning and implementation of technically sophisticated LAN/WLAN equipment for a company site in Africa. In addition to geographical features, the project focused on the integration of a mobile storage solution and the security requirements of three different user groups.
In 2013, the Weihrich Informatik team received the project award for the second time. The submitted project was convincing “because the customer’s high expectations were met in an innovative and unique way with a wide variety of network products”, according to the expert jury. Separate networks ensure optimum security for the customer, while fiber optics provide high performance and the network as a whole is highly available.

Because we want to actively counteract the shortage of IT specialists and because training the next generation of professionals is important to us, we train apprentices in the field of IT. Our Managing Director Thomas Weihrich has also been working as an audit expert for many years.

Mission statement

Everything for your success!

In everything we do, we stand for openness and transparency, a holistic approach and innovation – both internally and externally.

We maintain a trusting and cooperative partnership with our customers and take a holistic approach to their needs. We think outside the box, observe trends and implement professional solutions professionally. Such solutions are efficient and reliable, and are convincing in the long term – with services and products that meet the highest requirements. Our customers receive everything from a single source: consulting, implementation, maintenance and support.

Competent, committed and courteous employees are the basis of what we do. It is therefore a matter of course for us to provide our employees with individual training and support. We also do this thanks to varied and challenging activities and the opportunity for individuals to contribute their own ideas and develop further in a dynamic and successful environment, without neglecting the big picture. We promote communication and collaboration with a pleasant, modern working environment. We motivate and empower our employees to take responsibility for their own actions.

We work closely with our partners and suppliers. This means that we are always in a position to develop optimum solutions for our customers, even when faced with complex challenges.



  • Successful recertification of ISO 9001 and ISO 27001 according to the new 2022 standard
  • Certification as a Microsoft Cloud Solution Provider in the areas of MSFT/Office365 and Azure
  • Further development of security with Windows 11


  • Successful ISO 9001 (quality assurance) and 27001 (information security) certification
  • New ZCNE certifications in the areas of network (LAN) firewall security (Sec) and wireless network (WLAN)
  • Product development Security package and network analysis with action plan
  • Realignment of the Modern Managed Workplace solution
  • Introduction of Managed Microsoft 365 as well as Sign and Encrypt for our customers


  • Development of sustainable awareness training
  • Introduction and conversion to Windows 11
  • Further development of network security incl. WPA3 in the WLAN area
  • Expansion of VMWare competencies
  • Expansion of product range with high-performance CAD & gaming devices
  • Challenges of Covid-19 successfully overcome


  • Connecting the local and cloud worlds into a centrally and efficiently managed overall solution
  • Introduction of hyperconvergent server infrastructures (replacement of virtualized cluster solutions)
  • Expansion of partnerships and successful certifications in the areas of server & data center, network & security, applications & workstations
  • Introduction of Modern Workplace – predecessor of the later Modern Managed Workplace solution.
  • Increased network and operating system security
  • Development of a technology museum by the learners, Introduction of Zoom as a collaboration platform for larger events in addition to the existing solutions


  • Provision of customer access to our ticket system
  • Introduction of general authentication with second factor


  • Training and certifications in the All-IP area
    Acquisition of employees and customers of EREMIS IT Network Systems


  • Introduction of a managed workplace solution
  • Expansion of the training program


  • Introduction of customized security and update solutions
  • New training program in the area of safety
  • Launch of the “Kreuzlingen Knowledge Summit”


  • Further training in the areas of Swyx telephony, Microsoft Windows and ZyXEL network
  • Self-reflection and expansion of the service portfolio, internal process optimization


  • Successful completion of apprenticeship for the first business IT specialist trained at Weihrich Informatik


  • 10 years of successful business activity
    Renamed Weihrich Informatik GmbH
  • New orders at the World Economic Forum Davos
  • Certification as a Microsoft Silver Partner
  • New partnerships with iTernity, Netztech, DigiCert, Comarch and CodeTwo


  • Studerus Project Award for Africa project
  • Certification as ZyXEL Premium Solution Partner


  • Certification as Microsoft Small Business Partner, ZyXEL Partner and Swyx Solution Partner
  • New partnerships with Certon, Infinigate, iWay and Apexis
  • Extended mandate for the World Economic Forum Davos


  • Strengthening of expertise as a provider of complete IT solutions through new partnerships with Hewlett Packard Enterprise Switzerland, Swissparts AG and Dataprisma AG


  • Relocation within Kreuzlingen to Alleestrasse 20
  • Establishment of a new area for direct customer support (helpdesk)


  • First assignment at the World Economic Forum Davos (WEF)
  • First project abroad – Libreville, Gabon/West Africa


  • New partnership with Swisscom
  • Development of multisite solutions with Windows Server 2008 and DFS/R technology


  • New partnership with green.ch
  • Expansion of offerings for cloud solutions and secure Internet connections


  • Initial delivery and installation of entire IT systems with Windows Server 2003


  • Strategic realignment
  • Expansion of customer base
  • Introduction of managed antivirus solutions


  • Foundation of 2W Business Communication GmbH

Start your new IT project now!

Let us optimize your IT strategy together and develop suitable solutions for your company. At Weihrich Informatik, we focus on sustainability, expertise and speed in order to offer our customers the highest quality.

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