Tienka, who is fluent in English and Dutch, runs her own astrological practice in Bilthoven, Holland. Tienka initially trained as a nurse, specialising in Intensive Care, before developing her interest in astrology in 1992. She completed the five-year Vocational Psychological Astrology course of Karen Hamaker's foundation, Achernar, before pursuing Classical Studies in Horary and Advanced Classical Studies in Horary with Lee Lehman. She has also completed four years' training in Jungian Psychology and Special Symbols atStchting Odrerir, the Medieval Practitioner's Diploma and Diploma in Fixed Stars at Astro-Logos and the course in Medieval Astrology offered by Astro Mundi in Australia.

Tienka commenced her study of the STA's Masters Level Horary Course in March 2010 and began tutoring for the school in June 2012. She teaches horary courses in small attendance groups in Holland, and as well as learning horary 'hands-on' under the personal guidance of Tienka, students receive over 100 A4 pages of her Dutch language hand-outs and study notes.

Tienka offers consultations, lectures and workshops, and is a member of the Astrological Association of the Netherlands. She represented the STA school at the 2012 Annual Conference of the Astrological Association of Great Britain, where she explored the theme of finding lost objects with horary.

Tienka's personal website is at www.astrologiepraktijk.nl. She can be contacted via email attienka@sta.co.