top of page

HERSEMEYER

LEGAL

About me

Profile neu_edited_edited_edited_edited.j

Guillaume Hersemeyer

Attorney (Rechtsanwalt)

AIGP, CIPP(E), Data Protection Officer (TÜV)

Drawing on my experience of over ten years as an attorney, I advise my multinational clients on all matters relating to data protection, artificial intelligence and information technology throughout their digital transformation journey, including the development of new and existing business models.

  • LinkedIn

References

  • Provided legal advice on expanding existing and developing new (digital) business models and digitization initiatives, e.g. for national and international financial service providers.

  • Developed AI and data governance strategies, drafted corresponding compliance documentation, and negotiated contractual agreements with AI providers.

  • Advised multinational corporations and medium-sized companies on all aspects of data protection and information security.

  • Served as the external Data Protection Officer for medium-sized and large companies. 

  • Provided holistic data protection advice on the demerger of a major German blue-chip automotive company.

  • Review and restructured the global data protection management system for an international automotive group.

  • Provided GDPR advice to e-commerce retailers.

  • Safeguarded the use of AI-supported HR software by international tech companies.

  • Provided guidance on procuring software for law enforcement authorities.

  • Ongoing guidance on data protection for start-ups and SMEs.

  • Advised on and managed internal compliance investigations, e.g. at an international financial service provider.

  • Handled litigation before the administrative and the public procurement courts.

  • Implemented global data protection management systems for clients such as an international sports car manufacturer and the asset management subsidiary of a German high street bank.

  • Delivered bespoke data protection training for start-ups, SMEs, and group companies.

Career

Since 2025

Attorney | HERSEMEYER LEGAL, Berlin

2021-2025

Attorney | Senior Associate, Fieldfisher Partnerschaft von Rechtsanwälten mbB, Hamburg

2018-2021

Attorney | Senior Associate, Ernst & Young Law GmbH,

Berlin

2017-2018

Consultant Data Protection, intersoft consulting services AG,

Hamburg

2015-2016

Attorney, AfA Rechtsanwälte, Frankfurt am Main

2014

Second State Examination in Law

2012

First State Examination in Law

Certifications

Certified Information Privacy Professional - Europe (CIPP/E),

IAPP - International Association of Privacy Professionals

Data Protection Officer (TÜV)

Artificial Intelligence Governance Professional (AIGP),

IAPP - International Association of Privacy Professionals

Geschäftstreffen

01. Explainable Complexity.

Comprehensible

I speak your language, not just legalese. Whether as a decision-maker, project manager or specialist department, you can rely on my advice to reach those who need it.

bottom of page