In 2014, upon graduating, the 18-year-old Tissi joined the Vienna State Ballet at the invitation of Manuel Legris, and rejected an offer from La Scala Theatre Ballet.[1][2] The following year, La Scala invited him to join the company again, and he decided to return to Milan.[1] Soon, he portrayed Prince Desiré in The Sleeping Beauty, partnering Svetlana Zakharova, as both David Hallberg and his substitute Sergei Polunin were injured.[3][5] He also danced as Espada in Don Quixote, Des Grieux in MacMillan's Manon and Prince Charming in Bigonzetti's Cinderella.[1][4] He worked with company director Makhar Vaziev closely until he left the company in 2016.[1]