"I would hire you because I want to be secure. And because I know you are completely independent."
Ralph Schiller
Former CEO, FTI Group (18,000+ employees)
Independent Cyber Assessment
Your security assumptions hold. Until an attack path disproves them.
Attackers and AI now test them continuously. That's exactly where I come in — telling you plainly what actually threatens your business, why, and what will actually work.
Over 30 years of experience: took systems apart in the early days of the internet, later hacked banks, corporations and government agencies on assignment. Today that experience helps decision-makers assess technical risk in strategic decisions, transactions and crises.
Separating real risk from security theatre. Setting clear priorities. Staying until the problem is solved.
No vendor mandate. No board seat. Nothing that colours what I tell you.
What this means for youSelected clients
- SNB
- BNP Paribas
- Sparkasse
- Airbus
- Swiss Re
- Allianz
- AXA
- A1 Telekom Austria
- TeamViewer
- FTI Group
- Zalando
- Breitling
- World Economic Forum (WEF)
- University of St.Gallen (HSG)
- University of Liechtenstein
- Arrow ECS
- Check Point
- ESET
- Norman Data
- Avira
- Trend Micro
- it-sa Expo&Congress
Selected services
What clients typically bring me in for.
These situations are common starting points. The right answer, however, only emerges from the specific context.
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Next-Level Security
Cybersecurity at AI Speed
When attackers scale faster than traditional security processes can respond.
Aligning architecture, detection and decisions with the new speed.
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Check Before You Buy
M&A Cyber Due Diligence
What you're technically buying doesn't always show up in the data room. If an attacker is already inside, you inherit them at closing.
When purchase price, liability, integration or closing could be affected.
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Get a Hacker on Your Side
Cyber Crisis / Ransomware Response
When operations are down and the attacker is in control, every decision counts. That's when you need a hacker on your side. I have a proven track record of turning around exactly these situations.
Negotiating, buying time, recovering systems, limiting the damage.
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Activate the Watch Service
Scan Service
A security patrol for your internet-facing systems. It checks every day which door is standing open, before someone else walks through it.
Detecting, assessing and closing new vulnerabilities before they're exploited.
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Request a Keynote
Keynotes & Live Hacking
Cybersecurity, AI and the attacker's perspective for boards, leadership teams and expert audiences – accessible, current, and with real demonstrations instead of slide theatre.
When a topic needs to become visible and decision-ready, not just explained.
Track record
Asked. Quoted. Recommended.
Sought after on TV
over 10 TV appearances, invited as an expert
Print & trade press
approached by editors more than 100 times — never paid placement.
View press coverage- Spiegel
- Süddeutsche
- WELT
- NZZ
- Tages-Anzeiger
- Blick
- Focus
- Tagesspiegel
- Heise (iX, c't, Security, Telepolis)
- CIO
- Computerwoche
- Linux Magazin
- Beobachter
- Swissinfo
- St. Galler Tagblatt
- Luzerner Zeitung
- zentralplus
- inside-IT
- 20 Minuten
- digital-liechtenstein
- Baseler Zeitung
- Schweizerzeit
- Wirtschaftszeit
- Das Investment
- eGovernment Computing
- Inside Paradeplatz
- SonntagsZeitung
- Volksblatt Liechtenstein
Direct references
All individuals named are available as references on request.
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"An absolute professional with extensive expertise. He understands the technical systems required to build resilience efficiently."
Karl Markgraf
Former CIO, TeamViewer · Former CEO, FTI Group
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"I have absolute trust in your capabilities and integrity. You can communicate facts and results in a way that everyone understands."
Paul Karrer
Managing Director DACH, Arrow ECS
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"Leverage attacker mindset and adversary tactics to secure the IT landscape and consolidate operational resilience."
Romain Pradelle
CISO, Roland Berger · Former CISO, FTI Group · Former Security Leadership, TeamViewer
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"Gunnar combines technical depth, practical experience and executive relevance in a way that is rarely found."
Jürgen Brücker
CEO Executive Education, University of Zurich · Former Rector, University of Liechtenstein
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"When my company was hit by ransomware, Gunnar led the negotiations, recovery, and restoration effort. If anyone asks me whether I would work with him again, the answer is simple: absolutely."
Florian Seedorff
Owner, Estrella AG
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"We have had the privilege of featuring Gunnar in our executive education programmes for many years now, where he presents current topics of cyber security – from both the attacker's and the defender's perspectives – in a captivating and compelling manner, using impressive live simulations. He convinces with his unconventional, highly creative approach and a keen instinct for evolving threat landscapes."
Marco Allenspach
Executive Education Director, Institute of Insurance Economics, University of St. Gallen
Contact