Martha Sotiriou was born in Athens, Greece. She began her musical studies at the age of 8 (guitar and theory of music). She received her diploma at the Athenaeum "Maria Callas" Conservatory in Athens with distinction, First Prize and Golden Metal Special Prize (class of Christina Giannakopoulou) and her Master in Opera at the Academy of Music "Carl Maria von Weber" in Dresden, Germany (class of KS Prof. Matthias Henneberg), where she studied from 2016 until 2018. She also attended the Art Song (Lieder) class of KS Olaf Bär in the same university.
She made her operatic debut at the age of 25 as Hänsel in E. Humperdinck's opera "Hansel und Gretel" in Athens. Other roles include "The Fox" in L. Janacek's "The Cunning Little Vixen" at Dresden’s State Theater, Annio in W.A. Mozart's "La Clemenza di Tito" (Megaron Athens Concert Hall), the Third Lady in "Die Zauberflöte" as well as the Alto solo part in Handel's "Messiah" with the Athens City Orchestra and Choir. She was for a short time extra choir member of the Greek National Opera and during the 2018/2019 season she worked as 2nd Alto at the State Chor of the Semperoper Dresden. As a soloist she has worked with opera directors like Barbara Beyer, Solvejg Bauer and Franziska Severin and during her first professional contracts she sang in Franco Fagioli's "Rossini" album (Deutsche Grammophon), as a member of the small vocal ensemble "Armonia Atenea Choir".
In 2018/2019 she performed the role of “The Psychiatrist” in the premiere of "Liebesgrüße aus Muskau", a new comedy/musical work by Berliner director Geertje Boeden, at the Opera House of Görlitz, a role which she reprised in the 2019/2020 season. Further engagements in 2019/2020 were the premiere of the new opera "Frikadela" by the wellknown Greek composer and conductor Alkis Baltas (the successful production sold over 50000 tickets) and the New Year's Eve Opera Gala with the Athens City Orchestra. In 2021/2022 she will make her debut at Kiel Opera House as Princess Nicolette in S. Prokofiev's "The Love for the three Oranges".
She has taken part in opera masterclasses of Siegfried Jerusalem, Cheryl Studer, Christiane Iven, Aris Argiris, Dimitri Kavrakos, Aris Christofellis, belcanto expert Peter Berne and Daphne Evangelatos, as well as in numerous concerts, with piano and orchestra accompaniment.
She is a winner of the 2020 International Singing Competition of the Kammeroper Schloss Rheinsberg Festival and she was invited to sing in various Liederabend and Orchestra concerts (with the Junge Kammerphilarmonie Berlin) in the Schlosstheater Rheinsberg. Thanks to her excellent performance at the competition, she received a full scholarship for the 12th Lotte Lehmann Summer Academy. She was a semifinalist of the Cesti Competition 2020.