Responsibility
We treat your systems and data as if they were our own. Confidentiality is not a clause for us, it is an attitude.
About us
IT security you can shake hands on – from Kiel
TSBSec is the IT and cyber security business unit of TSB Top Sec Bau GmbH, based in Kiel, Germany. We help companies in Schleswig-Holstein, Hamburg and across Germany run their IT securely – without jargon and without overwhelm.
Mission
Professional security should not be a privilege of large corporations.
We bring the security standards that large enterprises take for granted to small and mid-sized businesses – understandable, affordable and with a contact who is reachable when it counts.
The name says it all: "Top Sec" stands for the ambition to reach the best possible security level that fits your company in every project. No more, no less.
Values
What we stand for
Thoroughness
We only stop when we have understood. Half an analysis leads to whole problems.
Clarity
You get honest assessments and clear recommendations – even when the answer is: you do not need this.
Continuity
Threats keep evolving. So do we. We train continuously and adapt our methods.
Methodology
We work to recognised standards
Our approach follows established frameworks – so results are comparable, traceable and usable for audits.
- BSI IT-Grundschutz
- ISO/IEC 27001
- NIS2 Directive
- OWASP Top 10 & ASVS
- NIST Cybersecurity Framework
- GDPR / BDSG
- CIS Controls
- MITRE ATT&CK
At a glance
- CompanyTSB Top Sec Bau GmbH
- Registered officeKiel, Schleswig-Holstein, Germany
- Founded2026
- Commercial registerAmtsgericht Kiel, HRB 29374 KI
Management
Who is behind TSBSec
Your contact
Vaidas Martusis
Managing Director
Vaidas Martusis is responsible for the management of TSB Top Sec Bau GmbH and for building the IT and cyber security business unit.
- info@tsbsec.de
- +49 15778716239
- Neufeldtstr. 6, 24118 Kiel
Get to know us.
A conversation says more than any website. We look forward to your enquiry.