The Scientific Advisory Board (SAB) is a council of international academic and industrial experts that was created with the aim to provide technical, practical, societal and legal recommendations to the DEEP-SEA project, relative to the development and the dissemination of its activities. The SAB was founded in 2021 and currently has 9 members from institutions and companies that are well recognized in the HPC community and beyond. The members will be involved throughout the project from the initial phases to the test, validation and impact assessments. The DEEP-SEA members keep regular contact with the SAB in order to be informed of their technology roadmaps, get access to pre-release technologies, and ensure that developments in the project are in line with emerging trends in HPC.