The Hackmanit team members have several years of experience gained in various academic and industrial projects. They deal with security of Web applications, Web Services, Single Sign-On, SSL/TLS, and various cryptographic protocols. In the following our management team is listed as your contact for our departments.

Contact image

Prof. Dr. Marcus Niemietz

CTO, Dept. Web
SMIME: Certificate
PGP: 3CC3 1D1A AAF8 3407 47BA A403 F10E CC43 061D 0357

For over a decade Marcus Niemietz has been working as a penetration tester and web security trainer.

As a co-founder of Hackmanit he has been responsible for web security since 2014. In addition, he is conducting research at the Clavis Institute for Information Security at Niederrhein University of Applied Sciences in the field of web security. He is a regular speaker at numerous international IT security conferences, including the USENIX Security, Black Hat (YouTube) and Microsoft‘s renowned hacker conference BlueHat. Marcus Niemietz is the publishing author of a book in the field of web security.

Contact image

Dr. Christian Mainka

CTO, Dept. Single Sign-On
SMIME: Certificate
PGP: 4442 AD78 02EA 02A3 5FAF F478 AFD9 A01A 362D F885

Christian Mainka completed his doctorate in 2017 on the topics of web services and single sign-on.

Since 2009, he has been working on security aspects resulting from the use of data description language such as XML. He developed the first web service-specific penetration test tool WS-Attacker. Since then, he has been constantly improving and extending the program so that it can now detect fully automatically a broad spectrum of known vulnerabilities on web services. In his dissertation "On Message-Level Security" he also analyses the security of modern single sign-on procedures such as SAML, OAuth and OpenID Connect and uncovered numerous security gaps.

Contact image

Prof. Dr. Juraj Somorovsky

CTO, Dept. Cryptography
SMIME: Certificate
PGP: E3DA 053B 27C6 4DAB A28B 4AF2 3D7B EC35 9CB2 F800

Prof. Dr. Juraj Somorovsky is professor for system security at the Paderborn University since February 2020. He completed his doctorate in the area of XML Security with distinction in 2013.

In his dissertation "On the Insecurity of XML Security", he analyzes various attacks on Web Services and cryptographic algorithms, and provides practical countermeasures, which were adopted by recognized security standards. His work was awarded with the CAST Award for the best dissertation in the field of IT security in 2013. He is the main developer of the analysis tool "TLS-Attacker" and author of numerous attacks on TLS. These include, for example, DROWN and ROBOT, which each won the Pwnie award for the Best Cryptographic Attack. Currently Juraj Somorovsky is head of the System Security Group at the Paderborn University and conducts research on applied crypto, network and system security. In addition to his scientific work, he gained practical penetrationtesting experiences as a freelancer in several industrial projects for different customers.

Contact image

Prof. Dr. Jörg Schwenk

PGP: D853 7A59 3169 EB64 9CE6 63B0 B847 F8F7 DCA2 348D

Since September 2003, Prof. Dr. Jörg Schwenk is the owner of the Chair for Network and Data Security at the Ruhr University Bochum. The chair belongs to the renowned Horst Görtz Institute for IT Security.

Professor Schwenk is an internationally recognized expert in the areas of cryptography and IT security. After completing his doctorate in the Department of Mathematics at the University of Giessen he moved in 1993 to Darmstadt, where he worked at the Telekom Technology center for applied research in the field of IT security Professor Schwenk is an author of numerous international publications in renowned conferences (for example Eurocrypt, Asiacrypt or Communications and Multimedia Security), author of textbooks on cryptography and Internet security, and about 60 patents in the field of IT security.

Contact image

Karsten Meyer zu Selhausen

Senior IT Security Consultant, RuhrSec
SMIME: Certificate
PGP: 0EDA AAC6 01DE 3D7F 2123 70F8 4535 C0E7 DB16 F148

Karsten Meyer zu Selhausen has several years of experience in the fields of secure deployment and secure use of Single Sign-On procedures, such as OAuth, OpenID Connect and SAML.

He works as an IT security consultant, penetration tester and trainer for Hackmanit GmbH since 2016. During his master degree in IT Security at the Ruhr-University Bochum, he specialized on the security of different protocols for delegated authorization and authentication, as well as, data description languages, such as XML and PDF. He gained his profound expertise in the secure use of the Single Sign-On procedures, such as OAuth, OpenID Connect and SAML, during numerous consulting projects and penetration tests and shares his knowledge and experience in security training courses.

Contact image

Conrad Schmidt

IT Security Developer
PGP: FBD1 00C0 A518 63BD 39C4 F99A 7239 47BA 30A1 DC4B

Conrad Schmidt has been working in the field of IT security for several years as a developer and penetration tester and therefore has expertise in both the creation and testing of web applications and infrastructure.

He has been working as an IT security developer and penetration tester at Hackmanit since 2023, developing security tools for use in testing, among other things. In his master's degree in IT Security at the Ruhr-University Bochum, he specialized in web security as well as network and transmission protocols such as TLS and DTLS. His experience in software development using Java, Python, C# and JavaScript helps him to write and test security-relevant software. At Hackmanit, he is working on the TLS testing tool "TLS-Anvil", which is being developed as part of the KoTeBi project.

Contact image

Jacqueline Hintze

Art Director, Marketing
PGP: DEEE B419 4676 59D9 6377 037A A268 55D1 226A 4219

Jacqueline Hintze has been working in the media and design industry for over a decade, proving her expertise in numerous advertising campaigns and projects for renowned companies.

Since 2019 she has been working as a communication designer for Hackmanit. As Art Director she is responsible for corporate identity and marketing strategy. After her successful graduation as a media designer and working several years for an advertising agency based in one of Germany’s major media cities, Düsseldorf, she decided to study communication design at the Düsseldorf University of Applied Sciences. During her studies she was nominated and placed in various competitions. Alongside her studies, she began to collect further experience as a freelance graphic designer. By the time she received her bachelor's degree in 2018, she already had many years of professional experience from various projects. Among other things, she has created advertising and marketing campaigns for a number of notable brands that have been used both nationally and internationally.