Developed Secure Boot KEK Update support for Fujitsu PK-signed KEK files in the microsoft/secureboot_objects repository, focusing on enhancing secure key exchange and firmware update safety. The work involved extending the KEK update map to include new PK-signed KEK files and OEM certificate metadata, supporting tighter supply-chain security for Fujitsu devices. Leveraging skills in certificate management, firmware development, and security compliance, the developer implemented changes using Binary and JSON formats. Windows validation was completed and security review cleared, with documentation and testing notes updated to align with release processes and facilitate cross-team collaboration on secure firmware updates.