 In England, he has worked at Crystal Palace FC and Arsenal FC's Academies as well as Leyton Orient FC's School of Excellence.His playing career included spells at Rocar Bucureşti, Dinamo Bucureşti and Steaua Bucureşti.Mario Marinică featured most notably in the youth and reserve teams at Rocar Bucureşti, Dinamo Bucureşti and Steaua Bucureşti, eventually retiring from playing in 1993.