Tim Estermann

Critic
DISC Type : C

Chief Information Security Officer (CISO) at Thalia Bücher GmbH

Hagen, North Rhine-Westphalia, Germany

Overview

Tim Estermann is the Chief Information Security Officer at Thalia Bücher GmbH, where he builds resilient cybersecurity programs. His background includes economic engineering from TU Dortmund University and journalism. He notably transitioned into the CISO role at Funke Mediengruppe after a major cyberattack, shaping their security strategy.

Outside of his formal role, Tim has turned his long-time hobby of IT security into his profession. He is a passionate advocate for knowledge sharing, frequently speaking at industry events and engaging with students, where he is noted for his exciting and accessible presentation style.

Unique fact: Tim began his career as a freelance journalist and layout artist before moving into IT and eventually becoming a CISO.

Personality Overview

Information Seeker

Precise

ROI Driven

They prefer to analyze logically and value objective facts over emotions.  They don’t appreciate bells and whistles unless backed by data. They are quite likely to negotiate on pricing or other key terms.

Topics They Care About

AI in Cybersecurity
He is a scheduled speaker on how AI creates new challenges for companies through deepfakes and tailored phishing attacks, but also offers new defense opportunities.
Cyberattack Recovery
He frequently speaks about his first-hand experience managing the consequences and lessons learned from the major cyberattack at his former employer, Funke Mediengruppe.
Security Education
Passionate about knowledge sharing, he participates in webinars and has even simulated live hacks for students to demonstrate the importance of cybersecurity.

Media Appearances

Tim has no verified media appearances

Work History

1-2025
Chief Information Security Officer (CISO) at Thalia Bücher GmbH
4-2021 - 1-2025
Chief Information Security Officer (CISO) at Funke Mediengruppe GmbH & Co. KGaA
5-2020 - 3-2021
Head of Strategic Technology Innovation at Funke Mediengruppe GmbH & Co. KGaA
8-2012 - 4-2020
Various positions at Funke Mediengruppe GmbH & Co. KGaA
1-2007 - 11-2014
IT Consultant at Estermann IT Services

Education

Wirtschaftsingenieurwesen from TU Dortmund University

More Information

Social Presence :

Prographics :

Exp : 19 Location : Hagen, North Rhine-Westphalia, Germany Job Level : Leadership Designation : Chief Information Security Officer (CISO) at Thalia Bücher GmbH
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Insights For Selling To Tim

During A Call Or A Meeting

DO's

  • If you can, show them industry reports or analyst comments instead of sharing anecdotal stories
  • Keep some extra margin while sharing pricing, they are likely to negotiate later
  • Be formal and objective, they will appreciate it more

DONT's

  • Don’t rush them till they have clearly gotten all the necessary information
  • Don’t try to give too many examples of other users, they like to make their own decisions
  • Do not use very emotional or colorful language

When Cold Calling

When Writing An Email

While Negotiating & Closing

    The secret to closing fast with Tim is

  • Proof of ROI, low pricing and objective proof points are the important factors for them.
  • Will you ever get a clear answer from Tim

  • They do not mind saying no if they believe that it is the right decision.

Insights For Deal Planning

    How fast (or slow) will Tim move?

  • They are neither the fastest nor the slowest decision makers, they are somewhere in the middle.
  • Can Tim take some risk or not?

  • They can bear some risk if their analysis backs the decision.

You And Tim

Personality Compatibility


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