Key people
The people behind strategy, technology and communication at Sheriff Security.
Oleksii Lysenko
Oleksii Lysenko
Oleksii Lysenko combines 15 years of leadership experience with a clear focus on forward-looking topics such as NIS2 readiness and smart risk management. As Managing Director of Sheriff Security GmbH in Stuttgart and business trainer at ABC Berlin, he supports companies entering the market and building strong teams. His recipe for success: Ukrainian energy meets German structure.
Alexander Maslo
Alexander Maslo
Alexander Maslo is an executive advisor with more than 20 years of experience in introducing innovative technologies to drive business growth, cyber protection and strategic IT consulting. For over 13 years he has advised companies in the DACH region - from large international corporations to dynamic startups - on digital transformation, building secure IT infrastructures and implementing modern risk management strategies, including NIS2 readiness for European mid-sized businesses.
Anne Bertsch
Anne Bertsch
Anne Bertsch, Content Manager - at Sheriff Security she gives language and content their shape. With an eye for the essentials, she translates specialist topics into clear messages and makes visible what the company stands for.
Dmytro Kyrylets
Dmytro Kyrylets
As Technical Account Manager at Sheriff Security GmbH, Dmytro Kyrylets combines technical knowledge with genuine customer focus. He supports companies from planning through to the implementation of secure IT solutions.
Roles and expertise instead of names.
The technical depth of our team, proven by verified certifications, without disclosing names.
SOC & Incident Response Lead (L3)
- MSSP
- SOC
- MDR
- DFIR
SOC Analyst (L1/L2)
- MSSP
- SOC
DFIR Specialist
- DFIR
- Forensics
Senior Penetration Tester (Lead)
- Pentest
- Attack Simulation
Web, API & Mobile App Pentester
- Web Pentest
- API Pentest
- Mobile Pentest
Infrastructure Penetration Tester
- Internal
- External
- Active Directory
Cloud Security Consultant
- Cloud Security
- Identity
Lead Auditor (GRC / Compliance)
- Audits
- NIS2
- ISO 27001
Our work is aligned with NIST CSF 2.0, NIST SP 800-61 & SP 800-115, ISO/IEC 27001*, SANS, MITRE ATT&CK, OWASP, CIS Controls, BSI IT-Grundschutz and TIBER-EU.
* Alignment with the standard; the formal ISO/IEC 27001 certification of the GmbH is in preparation.
Sheriff Security GmbH – security with system and responsibility
Sheriff Security GmbH, based in Stuttgart, is part of the international SHERIFF group, which has been establishing security solutions in Europe for more than 20 years. Our German core team is reinforced by a Europe-wide network - including Switzerland - of around 40 highly qualified specialists whom we involve on a project basis. In this way Sheriff Security combines international experience with local expertise.
What sets us apart:
- Holistic approach: cybersecurity and surveillance technology mesh seamlessly with us - for integrated security solutions that guarantee protection at the highest level.
- For companies and private clients: we deliver individual security concepts that start exactly where protection is needed.
- Hands-on experience: our team brings not only theory but experience from real attack scenarios - both in cybersecurity and in classic site protection.
- Premium quality: German clients expect transparency, precision and reliability. That is why we rely on clear operating protocols, certified standards (ISO 27001, NIS2, GDPR) and comprehensible quotes without hidden costs.
- Speed & responsiveness: with 24/7 monitoring, mobile response teams and an incident response approach, we protect clients around the clock - digitally and physically.
- Cybersecurity Quick Audit: our unique selling point in the German market is the combination of a fast, clear overview of the security status and a practice-oriented roadmap. Companies receive immediately actionable quick wins, prioritised recommendations and a basis for investment decisions.
Sheriff Security GmbH is the premium partner for security in Germany. We stand for precision, transparency and future-proof security - and offer solutions that go beyond standard measures.
Security from a single source - for companies and private clients.
Positioning in the market
While many providers specialise either in classic security or in cybersecurity, Sheriff Security combines both. Sheriff Security GmbH positions itself as a 360° partner for security, delivering clients a holistic solution - reliable, transparent and always one step ahead.
Our message
Sheriff Security stands for security with system, precision and responsibility. We are the partner for German companies and institutions that expect more than standard solutions - namely integrated security, clear structures and future-proof protection.