Siebert was born 1959 in West Berlin and spent most of her childhood here. After graduation, she moved to Essen, where she lived for twenty-five years, raised two children and completed a pilot training.
For three decades she has worked in various areas of aviation, both as a pilot and in the administrative field. Since 2018 she works as freelance artist.
Her artistic development was supported by a preparatory study at Alanus University; currently she is in the class of Professor Markus Lüpertz at Kolbermoor Academy.