Siân Cleaver is a British aerospace engineer and project manager based in Bremen, Germany, where she works for Airbus Defence and Space. She currently serves as the Major Spacecraft Domain Lead for Power and Avionics for the Orion European Service Module (ESM). In this role, she oversees the delivery of the power and avionic systems for the Orion spacecraft, a key component of NASA’s Artemis missions to the Moon. Siân’s career in the space industry began with a childhood interest in astronomy, which led her from an all-girls grammar school in Essex to Durham University, where she studied Physics and Astronomy. She started her professional life at Airbus in the UK as a systems engineer and project manager for future science and exploration missions before moving to Germany to join the international industrial effort behind the next generation of human spaceflight via the Artemis programme. Alongside her engineering work, Siân is a media-trained speaker experienced in explaining complex aerospace topics to the public. She has contributed to live broadcasts for BBC News and Sky News and even demonstrated the Rosalind Franklin Mars Rover prototype live on Blue Peter. She also participates in and chairs panel discussions at industry events, focusing primarily on human spaceflight, the Artemis program and the logistics of lunar exploration. Siân is also active in efforts to support a more inclusive industry. She previously chaired the UK Women in Science and Engineering (WISE) Young Professionals’ Board and founded the ‘Balance for Business’ diversity network at her Airbus site. When she is not working on spacecraft systems, she is a student private pilot, scuba diver, and astronomer. She aims to provide an authentic perspective on the industry to help bridge the gap between technical engineering projects and the wider public.

Multiple appearances on live national news and radio broadcasts, including providing expert commentary for BBC News, Sky News and various radio stations. TEDx talk: "Hard Hats and Lab Coats" (2016) Guest on multiple podcasts, including the Inventive Podcast. Panellist on various panels including the World Space Week Association "Women in Space" global webinar and the 2022 Airbus Summit. Author of two online-only children's stories as part of the Bedtime Stories for Very Young Engineers initiative. Presenter/speaker and exhibitor at large-scale STEM workshops and public lectures (audiences of 500+).