Benjamin
GROLLEAU

My name is Benjamin GROLLEAU, an engineering graduate of ENSEIRB-MATMECA, Bordeaux INP, where I completed a work-study degree in Networks and Computer Science. I specialize in IoT cybersecurity and embedded systems and have been working as an R&D engineer at CATIE in Talence, France, since September 2026. Following three years as an apprentice, I continue to design secure embedded architectures on Zephyr RTOS using ARM TrustZone and TrustedFirmware-M, alongside STSAFE secure elements. My work covers hardware-rooted identity, secure boot, the chain of trust, and MQTT-over-TLS communications, from hardware to the application layer. My fixed-term contract runs until February 2027 and also includes embedded AI integration with AIDGE.

During my studies at ENSEIRB-MATMECA, I served as secretary and website manager of the Students’ Union in 2024–2025. I helped organize events for up to 700 students and deploy websites used by approximately 1,200 students and external visitors. At Eirbware, I also served as co-server manager in 2024–2025, sharing responsibility for hosting over 50 associations and clubs, maintaining the election website, and helping deploy campaign websites. In 2025–2026, I was secretary of Apicult’eirb. I helped create and install two beehives on campus and developed a blog to share updates on their activity. These commitments strengthened my project management and teamwork skills.

From June to August 2023, I completed a research internship at UFRGS in Porto Alegre, Brazil. I implemented an open-source EDA flow using OpenROAD for ASAP7 technology, in collaboration with Silvaco, to optimize standard-cell libraries. From February to September 2025, I then conducted an R&D master’s thesis on secure IoT provisioning at CATIE. This solo project combined Zephyr RTOS, TrustZone, TF-M, and STSafe-A110/A120 secure elements on nRF5340 microcontrollers. It resulted in a working demonstrator and a successfully defended and validated thesis. I also contribute to open source through Zephyr RTOS (TF-M secure peripheral support), Trusted Firmware-M (an OTP provisioning script and template for b_u585i_iot02a), and STSELib (secure element integration).