After graduating from the Sports College in Cluj Napoca, in 1974, Tadici trained the Romanian team HC Zalău for 30 years, winning the Romanian Women's Handball League three times and one time the EHF Challenge Cup in 1996. Then, he won the silver medal in the 2005 World Women's Handball Championship from Russia and got the 4th placed in the 2007 World Women's Handball Championship from France, with the Romania women's national handball team.