T-Systems was founded in 2000, when Deutsche Telekom acquired a 50.1% stake of debis Systemhaus, one of the largest IT services companies in Germany at the time. Most of Deutsche Telekom's existing service and IT businesses were then merged and incorporated under the control of one single company, the newly founded T-Systems. In 2001 T-System's headquarters were moved from Bonn to Frankfurt. In 2002 the remaining 49.9% share of debis Systemhaus was acquired and fully incorporated into T-Systems.
However, the company underwent a leadership crisis during the first years after its creation, due to different agendas of the former debis management and the leadership of the former Telekom subsidiaries. Since then, T-Systems made a number of acquisitions, most notably the purchase of gedas, the IT subsidiary of Volkswagen Group in December 2005.9 From 2007 to 2018, Reinhard Clemens was T-Systems' CEO. T-Systems also supported the creation of Silicon Saxony, a major IT cluster in Germany.10
In 2008 T-Systems and the Cognizant global IT services provider entered into a global alliance.11 T-Systems' India operations were taken over by Cognizant following this alliance in late March 2008.1213 T-Systems is also working for the German government14 and a market leader in Germany.15
In 2009, T-Systems came with another wing in India (T-Systems ICT India Pvt. Ltd.) to support its global partners. T-Systems ICT India has its head office in Pune with another 'Point of Production' in Bengaluru established in April 2016 and a 'Cloud and Digital Centre' at Nagpur established in 2022 in partnership with Tech Mahindra.16 Since January 2022, Anant Padmanabhan is the managing director of T-Systems ICT India.17
In 2020, T-Systems employed more than 28,000 people in 20 countries and generated annual sales of EUR 4.2 billion.18
T-Systems has different International Subsidiaries such as:
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"An HP und T-Systems: Eon macht milliardenschweres Outsourcing perfekt". www.computerwoche.de. Archived from the original on 2012-11-11. Retrieved 2012-03-15. http://www.computerwoche.de/management/it-services/2360293/ ↩
"BAT: Big deal for cloud computing | T-Systems". Archived from the original on 2014-08-09. Retrieved 2015-04-29. https://web.archive.org/web/20140809110434/http://www.t-systems.com/news-media/bat-big-deal-for-cloud-computing/826368 ↩
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"5G Survey: Despite COVID-19 delays, operator roadmaps still lead to 5G". www.spglobal.com. Archived from the original on 2020-12-08. Retrieved 2020-12-10. https://www.spglobal.com/marketintelligence/en/news-insights/blog/5g-survey-despite-covid-19-delays-operator-roadmaps-still-lead-to-5g ↩
Douglas Busvine (June 21, 2018). "Deutsche Telekom's T-Systems to cut 10,000 jobs: CEO". Reuters. Archived from the original on June 24, 2018. Retrieved June 23, 2018. https://www.reuters.com/article/us-deutsche-telekom-t-systems/deutsche-telekoms-t-systems-to-cut-10000-jobs-ceo-idUSKBN1JH2C6 ↩
"T-Systems Acquires VW Subsidiary gedas". cimdata.com. Archived from the original on 2011-07-08. Retrieved 2010-12-22. http://cimdata.com/newsletter/2005/51/04/51.04.01.htm ↩
"Mitglieder – Arbeitskreis Software". www.software-saxony.de. Archived from the original on 2011-12-27. Retrieved 2012-03-16. http://www.software-saxony.de/?page_id=4 ↩
"Press Release: First Systems Integration Alliance to Globally Serve Corporate Europe". Archived from the original on 2008-03-26. Retrieved 2008-03-20. https://www.cognizant.com/html/news/pressreleases/2008/cognizantTSystems.asp ↩
"Cognizant Tech to buy T-System's India business". Business Standard. 6 March 2008. Archived from the original on 29 May 2016. Retrieved 9 March 2013. http://www.business-standard.com/article/technology/cognizant-tech-to-buy-t-system-s-india-business-108030601108_1.html ↩
"Cognizant takes over T-Systems India ops". 28 March 2008. Archived from the original on 27 February 2017. Retrieved 9 March 2013. http://bicclatestnews.blogspot.in/2008/03/cognizant-takes-over-t-systems-india.html ↩
"Merkel-Phones wechseln auf Android". heise online. 7 March 2012. Archived from the original on 22 March 2012. Retrieved 16 March 2012. http://www.heise.de/newsticker/meldung/Merkel-Phones-wechseln-auf-Android-1465257.html ↩
"Führende IT-Service-Unternehmen in Deutschland 2010 (alphabetisch)" [Leading IT service companies in Germany 2010 (alphabetical)] (PDF) (in German). Archived from the original (PDF) on 2011-11-25. Retrieved 2012-03-16. https://web.archive.org/web/20111125052536/http://luenendonk-shop.de/out/pictures/0/lue_its_2011_f300511_fl.pdf ↩
"T-Systems opens Delivery Centre at Nagpur in partnership with Tech Mahindra". T-Systems. Archived from the original on 2023-04-18. Retrieved 2023-04-18. https://www.t-systems.com/in/en/newsroom/news/t-systems-opens-delivery-center-at-nagpur-562326 ↩
"T-Systems names Anant Padmanabhan as Managing Director". ANI News. Archived from the original on 2023-04-18. Retrieved 2023-04-18. https://www.aninews.in/news/business/business/t-systems-names-anant-padmanabhan-as-managing-director20220121152918/ ↩
Arnold, Heinz Ludwig (2021), "Cailloux, Bernd: Das Geschäftsjahr 1968/69", Kindlers Literatur Lexikon (KLL), Stuttgart: J.B. Metzler, pp. 1–2, doi:10.1007/978-3-476-05728-0_1600-1, ISBN 978-3-476-05728-0, S2CID 229429177, archived from the original on 2024-02-06, retrieved 2022-06-29 978-3-476-05728-0 ↩