Sosina was born in Addis Ababa, Ethiopia, in 1978. She started doing gymnastics at the age of 7, and was Ethiopian Gymnastics Champion at ages 9 and 11. She joined Circus Ethiopia in 1993 and toured the world for five years as an acrobat, contortionist and dancer and has performaned at the Adelaide Festival, the Womad Festival in England, and a performance for the Queen of the Netherlands.
In 1998 she moved to Australia, and by 1999 had completed a Diploma in Small Companies and Community Theatre at Swinburne University, including spending a month doing work experience with Australia’s flagship contemporary circus, Circus Oz, and participating in a Melbourne Women’s Circus community performance.