Detlef Klett

Detlef specialises in legal advice in the fields of digitisation, artificial intelligence, data protection and telecommunications. The focus of his practice is complex IT projects.

He also advises the public sector on large-volume IT and infrastructure projects, in particular the Federal Ministry of the Interior, Building and Community and its downstream sectors. Detlef has been the regular recipient of awards in recent years and is regarded as one of the most respected IT lawyers in Germany.

Artificial Intelligence Act (AI Act)

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CV

Since 2005 Partner, Taylor Wessing

1996 – 2005 Associate/Partner, Andersen Legal/ Luther Rechtsanwaltsgesellschaft

1983 – 1986 Training as a banker, Sparkasse Köln,Bonn

Career

Since 2005 Partner, Taylor Wessing

1996 – 2005 Associate/Partner, Andersen Legal/ Luther Rechtsanwaltsgesellschaft

1983 – 1986 Training as a banker, Sparkasse Köln,Bonn

Education

2005 Admitted as a lawyer, Düsseldorf

1996 – 2005 Admitted as a lawyer, Cologne

1996 Second state examination, Cologne

Publications

Info-Film: Überholt die Digitalisierung das Recht?, 03/2018

Additional languages

Awards

JUVE 2025/2026

Featured

JUVE 2025/2026

WirtschaftsWoche Ranking 2025

Experience

Berlin Senate Department for Health, Care and Equality – GBE IT specialist procedure

Advising the Senate Department for Health, Care and Equality on the introduction and commissioning of a new cloud-based IT specialist procedure for health reporting (GBE) and IT procedure management in the field of health policy. The consulting services included preparing the EU tendering process and drafting the contract based on the new EVB-IT Cloud contract.

Dr. Michael Brüggemann

Detlef Klett

Fritz-Ulli Pieper, LL.M.

Procurement Office of the German Federal Ministry of the Interior (BeschA) – Oracle framework agreement

Comprehensive advice to the Procurement Office of the Federal Ministry of the Interior on a large-volume framework agreement for the purchase of cloud-based Oracle products. The advice focused in particular on IT contract law and data protection law and accompanied the entire tendering and contract drafting process.

Detlef Klett

Fritz-Ulli Pieper, LL.M.

German Federal Office for Information Security (BSI) – Data protection consulting

Ongoing support for the BSI in the legally compliant implementation of data protection requirements. The consulting services cover data subject rights, the creation of data protection templates and concepts, the preparation of internal information materials, and support with formal requirements and individual case reviews.

Detlef Klett

Mareike Christine Gehrmann

Dr. Benedikt Kohn, CIPP/E

Federal Ministry of Digital and Public Administration (BMDS) – Microsoft Sovereign Cloud (MSSC)

Comprehensive advice to the federal government on the migration of stationary Microsoft applications (‘on premise’) to a sovereign cloud solution offered by Delos Cloud GmbH (a subsidiary of SAP SE). Taylor Wessing provided legal advice on all aspects of this extremely extensive and complex project. In particular, we thoroughly reviewed, revised and negotiated the basic cloud agreement. We also provided advice on public procurement law and on the agreement to be concluded with SAP SE.

Detlef Klett

Dr. Michael Brüggemann

Dr. Ernst-Albrecht von Beauvais, LL.M. (Berkeley)

Maximilian Schumann

Member of Chubb Europe's Cyber Incident Response Team

CHUBB European Group Limited, Directorate for Germany as member of its Cyber Incident Response Team. Chubb is the world’s largest publicly traded property and casualty insurance company.

Dr. Gunbritt Kammerer-Galahn

Detlef Klett

Mareike Christine Gehrmann

Dr. Axel Frhr. von dem Bussche, LL.M. (L.S.E.), CIPP/E