About us and our management team.

About essentry

We understand enterprise requirements.

essentry originates from the demanding data center industry where high security facilities are an absolute necessity. We offer this sector and others the highest level of access security, taking into account strict requirements for data protection, data security and compliance standards. We have industrialized these standards in our products, enabling other organizations and industries to apply them. We have years of experience in integrating software and hardware into existing building management systems and have therefore designed our solutions to be flexible and customizable.

Partners in high-security solutions, security services and facility management

Learn more about our partner Securitas Germany.

Learn more about our partner e-shelter security.

Learn more about our partner Nexus Group.

Learn more about our partner Rohde & Schwarz.

Learn more about our partner ISS.

Learn more about our partner Apleona.

Certificates and memberships

essentry is certified according to ISO 27001 on the basis of BSI IT-Grundschutz (BSI-IGZ-0459-2021).

essentry has been awarded the TeleTrust trust mark “IT Security made in Germany” by the German IT Security Association.

The essentry software is regularly tested by penetration tests of SYSS GmbH.

essentry is a member of the Verband Innovatives Rechenzentrum e.V. (Innovative Data Center Association).

essentry is part of the Intel® IoT Market Ready Solutions.

Leadership Team

Dennis is co-founder and CEO of essentry. He gained industry experience in projects at Deere & Company, SAP SE, BASF SE and DFL Deutsche Fußball Liga. He is also Founding Partner of Anyon, a leading German PropTech venture fund.

Christian is co-founder and Head of Technology at essentry. He has over 10 years of professional experience as a software engineer. Before joining essentry, he worked as a software developer at SAP SE.

Nikolai is Co-founder and Head of Operations at essentry. Before joining essentry, he has been building startups in both management and investor roles, among others at Rocket Internet, Anyon and Helpling.

Esmeralda is responsible for marketing at essentry. She has more than 20 years of expertise as a communications specialist and has successfully built up the PR and marketing departments in various companies.


Rupprecht Rittweger

Rupprecht Rittweger is a serial entrepreneur and co-founder of essentry. He is the managing director of Investa Holding GmbH. He also founded e-shelter and made it one of the leading data center companies in Europe. In 2003, he founded e-shelter security GmbH, where he now drives growth in the areas of security technology, digitalization and IoT applications.

Frank Brandenburg

Frank Brandenburg is senior advisor of essentry. He has many years of experience in the IT security industry in prominent positions. He is the former CEO of NTT Com Security AG and former Global COO of NTT Security.

Klaus Vitt

Klaus Vitt is Senior Advisor at essentry. He is a former State Secretary and was the Federal Government Commissioner for Information Technology until 2020. Before that, he held several management positions in the IT and telecommunications industry.


We’re technology enthusiasts.

We are dedicated to enabling our customers to transform the visitor experience. We are growing our team of curious, aspiring people who want to find a purpose in their work and support each other in the process.