The club successively featured in the first-ever Serie A season in 1929, and played consecutively to the Italian top flight until 1956.

Successively, Rocco returned to Triestina as a head coach in 1947, and completed the 1947–48 as Serie A runners-up, only behind Torino; this is still, as of today, the best result in history for the Trieste-based club.

Rocco then left in 1950 to be replaced by Hungarian coach Béla Guttman, who managed to save the club from relegation only in the final matchday.

Successively, Triestina returned to Serie A in 1958, but were relegated in their first comeback season, which is also their last top flight campaign to date.

The list include the tandem Alessandro Calori-Adriano Buffoni, Pietro Vierchowod, caretaker Francesco De Falco, youth team coach Vittorio Russo and Andrea Agostinelli.

In addition, Triestina's owner Flaviano Tonellotto was forced to resign on 1 February 2006 by the magistrates because of a pending court procedure for bankruptcy, and his wife Jeannine Koevoets was named to replace him at the helm of the club.

The magistrates named Francesco De Falco as caretaker chairman with the idea of finding somebody interested to buy the club.

Curiously, in the 2005–06 De Falco, a player for Triestina in the 80's, covered three different roles in the club: director of football, manager and chairman.

In recent years, Triestina struggled to mount a promotion campaign to end half-century absence from the Italian top flight.

[7] Fantinel was also suspended for 3 months in 2006–07 Serie B, also causing the club 1 point, for irregularities on preparing quarterly management report on 30 March 2006.