Stanislaus S.

Security Consultant at Rohde & Schwarz AG

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Monheim am Rhein, Germany

Experience

Dec 2023 - Present
2 years 1 month

Security Consultant at Rohde & Schwarz AG

Star Labs GmbH

  • Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
  • Developed and audited Linux drivers
  • Collaborated using GitLab, Gerrit, Confluence and Jira
  • Technologies: C, C++, Secure Boot
Jan 2023 - Dec 2023
1 year

Security Consultant at Miele & Cie. KG

Star Labs GmbH

  • Analyzed and reviewed existing processes
  • Conducted threat modeling and analysis, defined correction measures
  • Designed, implemented and rolled out PKI
  • Technologies: Secure Boot, Bluetooth LE
Dec 2022 - Jan 2023
2 months

Security Consultant at SICK AG

Star Labs GmbH

  • Analyzed and reviewed existing code
  • Presented plan to update architecture to state of the art security mechanics
  • Technologies: C, C++, Secure Boot
Jan 2022 - Nov 2022
11 months

Security Consultant at Telekom AG

Star Labs GmbH

  • Performed security analysis of white labeled and Yocto based router software based on RDK
  • Implemented Secure Boot on Broadcom chipsets using Broadcom SDK
  • Conducted code reviews and reported to management
  • Planned and implemented automated security tests in GitLab
  • Handled PKI with HSMs and PKCS#11
  • Technologies: C, C++, Yocto, Secure Boot
Aug 2021 - Dec 2021
5 months

Security Consultant and C++ Developer at IBM GmbH

Star Labs GmbH

  • Developed microservices in C++ for elektronische Patientenakte by Gematik
  • Deployed solutions on Kubernetes
  • Ensured security-based development to fulfill Gematik requirements
  • Performed low level OpenSSL development
  • Handled Utimaco HSM integration
  • Technologies: C, C++, Kubernetes, Docker
May 2021 - Dec 2021
8 months

Security Consultant at Erweka GmbH

Star Labs GmbH

  • Ported operating system from Ubuntu to Yocto
  • Implemented Secure Boot on iMX8MM
  • Conducted penetration testing of Secure Boot
  • Set up PKI
  • Technologies: C, C++, Yocto, Secure Boot
May 2021 - Jul 2021
3 months

C++ Developer at Rohde & Schwarz GmbH

Star Labs GmbH

  • Developed microservices for Docker clusters
  • Set up high throughput Kafka infrastructure
  • Worked on distributed systems
  • Technologies: C, C++, Conan, Kafka
Jan 2021 - Mar 2021
3 months

Security Consultant at Resado GmbH

Star Labs GmbH

  • Developed HSM solutions based on Yocto
  • Designed update strategies for high security embedded devices
  • Planned penetration tests for FIPS certification
  • Technologies: C, C++, Yocto, Bitbake, Bash
Aug 2019 - Present
6 years 5 months

Co-Founder

Star Labs GmbH

Jul 2017 - Mar 2021
3 years 9 months

Security Consultant at Telekom AG

Star Labs GmbH

  • Led security and development support for Smart Speaker
  • Conducted SoC analysis and vulnerability research
  • Planned and set up HSM based PKI (nCipher)
  • Documented security processes
  • Designed and implemented Secure Boot chain
  • Designed Linux access control and separation of concerns
  • Conducted code reviews in international teams
  • Ensured Amazon Alexa device certification security compliance
  • Coordinated OEM deliveries and integrated hardware security CAAM from NXP
  • Technologies: C, C++, Python, Ghidra, Yocto, Bitbake, Bash
Apr 2015 - Sep 2016
1 year 6 months

Lead Mobile Developer and Security Consultant at Seal One AG

Stelle-Beratung

  • Planned, designed and implemented Seal One apps for Android and iOS
  • Designed Bluetooth Low Energy protocol for fast data transmission
  • Analyzed BLE traffic for low level functionality
  • Developed microcontroller firmware on secure tokens
  • Technologies: IDA Pro, C, Java, ObjC, HTML, JavaScript
Apr 2014 - Mar 2015
1 year

Lead Mobile Developer and Security Consultant at nextmarkets GmbH

Stelle-Beratung

  • Provided consulting and training on real time data communication security
  • Implemented and hardened Android and iOS nextmarkets mobile apps
  • Advised on infrastructure and performed penetration tests
  • Technologies: Java, ObjC, HTML, JavaScript
Apr 2014 - Mar 2015
1 year

Lead Mobile Developer and Security Consultant at stapp GmbH

Stelle-Beratung

  • Prototyped and implemented a fashion and lifestyle app for Android and iOS
  • Provided infrastructure consulting and conducted penetration tests
  • Technologies: Java, ObjC, HTML, JavaScript
Sep 2013 - Dec 2013
4 months

Lead Android Developer and Security Consultant at Seal One AG

Stelle-Beratung

  • Consulted on secure protocols for authorization
  • Performed product hardening for various brands
  • Developed Postbank Best Sign Android component
  • Technologies: Java
Mar 2013 - Mar 2014
1 year 1 month

Lead Android Developer at Telekom AG

Stelle-Beratung

  • Implemented features and resolved bugs for Tolino eReader
  • Maintained white label solutions for seven partners on Google Play Store
  • Integrated and upstreamed the Readium SDK
  • Coordinated and led a nearshore team in Romania
  • Technologies: C++, Java
May 2012 - Jan 2013
9 months

Working Student (Master Thesis)

CASED

  • Developed CrowdApp Android application for multi-hop tethering based on Batman mesh protocol
  • Operated Android smartphone in promiscuous mode and forwarded TCP packets based on digital signatures
  • Designed and implemented an anonymous multi-hop tethering community platform with traceability
  • Published CrowdApp research paper
  • Technologies: C, Bash, Java
Feb 2012 - Apr 2012
3 months

Working Student

CASED

  • Performed Android OS penetration testing
  • Analyzed Broadcom Linux drivers
  • Extended mdk3 toolkit for IEEE 802.11 management frame injection
  • Technologies: C
Oct 2010 - Jan 2012
1 year 4 months

Working Student

CASED

  • Developed symmetric key material deployment tool for Contiki OS
  • Designed and implemented Java-based GUI for key generation
  • Implemented ZigBee and WiFi communication on low power IoT devices
  • Presented research at ARES 2012
  • Technologies: C, Java
Mar 2010 - May 2010
3 months

Working Student (Bachelor Thesis)

SAP AG

  • Conceptualized, analyzed and developed UI/UX operations
  • Invented and prototyped a new drag & drop concept for group activities on wall-sized displays
  • Conducted A/B testing and scientific evaluation of findings
  • Technologies: C#
Jun 2009 - Sep 2009
4 months

Working Student (Research Internship)

SAP AG

  • Ensured fraud assurance in service oriented business applications
  • Contributed to TEXO research project Maestro
  • Implemented segregation of duty and four eye principle in workflows
  • Technologies: Java
Jan 2009 - Mar 2009
3 months

Working Student (Research Internship)

SAP AG

  • Monitored networks with Nagios 3
  • Aggregated server information with phpEquimon for administration
  • Developed open source Nagios SAP CCMS plugin
  • Technologies: C, Bash, XML, PHP
Aug 2008 - Sep 2008
2 months

Working Student (Research Internship)

SAP AG

  • Analyzed and prototyped Joint Common Operational Picture for NATO
  • Collaborated with NATO NC3O research facility
  • Aggregated data from SOAP web services
  • Technologies: Java, ABAP, SOA
Oct 2007 - Dec 2007
3 months

Working Student (Research Internship)

SAP AG

  • Developed tests for J2EE-based SAP ERP deployment server
  • Extended functionality and optimized performance hotspots
  • Technologies: J2EE, Perforce

Summary

Before finishing his studies, Mr Stelle was involved in numerous international client projects while working for SAP. After graduating from TU Darmstadt with a Master in IT Security and a strong focus on Mobile Security, he was working as an IT freelancer since 2013, refining his expertise in a broad field ranging from mobile development, protocol design, hardening schemes for IoT devices and servers alike and client development work. All the while covering either the role of a Security Architect, Technical Lead, System Architect or Lead Developer. Clients trust him to finish the job while using up to date technologies and methodologies and coordinating work with internal and external work forces.

Skills

  • Security: Pki, Thales Hsms, Yubihsm2, Nitrokey Hsm, X509, Security Architectures, Protool Design, Secure Boot Chains, Metasploit, Nmap, Injections

  • Operating Systems: Linux, Windows, Macos, Android, Ios, Contiki

  • Programming Languages: C/c++, Python, Shell-script, Java (Android + J2ee), Objc, Javascript, Assembler (X86, X86 64, Arm)

  • Meta-languages/services: Json, Xml + Xsd, Xslt, Soap, Rest

  • Methodologies: Scrum, Kanban, Safe, Uml, Rapid Prototyping, Extreme Programming

  • Database Systems: Mysql, Sqlite, Postgresql

  • Release Management Systems: Git, Subversion, Cvs, Perforce

  • Continuous Integration: Jenkins, Gitlab Ci, Ant, Maven

  • Telecommunication: 868mhz Technology (Zigbee)

  • Telecommunication: 2,4ghz Technology (Wifi, Bt, Ble, Zigbee)

Languages

German
Native
Russian
Native
English
Advanced
French
Elementary

Education

Oct 2010 - Sep 2013

TU Darmstadt

Master, IT Security · IT Security · Darmstadt, Germany

Oct 2007 - Sep 2010

DHBW Karlsruhe

Bachelor, Applied IT · Applied IT · Karlsruhe, Germany

Certifications & licenses

CEH

CISSP

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