After a fifth place finish at the 1990 World Junior Championships in Athletics, Isăilă emerged two years later with a bronze medal at the 1992 European Athletics U23 Cup then a gold medal at the 1992 World Junior Championships in Athletics. She made the final at the 1993 World Championships in Athletics a year later, ending the competition in seventh place. A silver medal came at the 1995 Summer Universiade behind her compatriot Felicia Țilea. She was a finalist at the 1994 European Athletics Championships and represented Romania one further time globally at the 1995 World Championships in Athletics, though she did not progress beyond qualifying.