About Me
I’m Andriu Isenring, founder and owner of Zerberos, a Zurich-based sole proprietorship specialized in information security. For more than 25 years, I have been helping organizations protect their IT infrastructure, identify risks, and implement practical, effective security measures.
What sets me apart: You know exactly who you’re working with. I personally carry out all projects – from the initial consultation to the final report. You benefit directly from my long-standing experience and my focus on complex security analyses and penetration testing.
I work independently and vendor-neutral. When a project requires it, I selectively involve a trusted network of experienced security experts.
Experience and Scope
I have successfully completed projects for organizations of all sizes – from small Swiss SMEs to international enterprises with thousands of employees and large-scale IT infrastructures. My work spans a wide range of industries:
- Financial Services: Banks, insurance providers, payment platforms
- Healthcare: Hospitals, insurance companies, laboratories
- Public Sector: Federal agencies, cantonal and municipal governments
- Industry & Services: Manufacturing, logistics, engineering
- Critical Infrastructure: Utilities, transportation, telecommunications
- E-commerce & Retail: Online merchants, digital commerce platforms
- Tourism, Hospitality & Gastronomy
My geographical focus is Switzerland, but I have also worked on projects across Europe and globally.
Approach and Values
As an independent security specialist, I stand for clear communication, honesty, and efficiency. My goal is not to sell the most measures, but the ones that actually make sense – tailored, transparent, and effective.
- Transparency: I explain methods and risks clearly – for both technical and non-technical stakeholders.
- Responsibility: You work directly with me. I stand by every assessment and recommendation I deliver.
- Efficiency: No bloated processes – just precise, effective work with measurable results.
Services
I focus on realistic, methodical security testing with practical value. My services are aimed at organizations seeking high-quality, independent security assessments without sales pressure:
- External Penetration Testing: Simulated attacks from the internet targeting public systems (e.g. web servers, VPNs, cloud services).
- Internal Penetration Testing: Simulations from inside the network (e.g. via compromised endpoints) to assess lateral movement and access escalation.
- Social Engineering: Testing human and organizational defenses through phishing, vishing, or physical intrusion scenarios.
- Web & Application Security: Analysis of web apps, APIs, and mobile apps – based on OWASP standards.
- Red Teaming / Adversary Simulation: Multi-stage, realistic attack simulations combining technical, social, and physical methods.
- Security Audits & Assessments: Gap analyses and security posture reviews based on ISO 27001, NIST, or industry-specific standards.
- Awareness Training & Scenario-Based Workshops: Tailored security training based on real-world insights.
Contact
If you’d like to know how I can support your organization – whether for a one-off test, ongoing collaboration, or advisory work – I look forward to hearing from you.
Zerberos stands for focused, hands-on security expertise with personal accountability.
Andriu Isenring, CISSP
Your partner for pragmatic and effective information security.
Zerberos is not just a service provider but your partner in cybersecurity. Let us work together to create a secure digital future!
