Louisa Mason is a doctoral researcher at the University of Manchester. She conducted the first SETI survey using archival ALMA data, searching millimeter/submillimeter Band 3 observations rather than the traditional water-hole radio band, and introduced a “stellar-bycatch” method for estimating the full stellar population incidentally captured in SETI telescope pointings using the Besançon Galactic Model. Presented findings at the Royal Astronomical Society’s National Astronomy Meeting 2026 (NAM 2026) (src-ras-alien-radio-channel-technosignature-2026-07).