Right at the end of his playing career in 1995, Jacobacci started his coaching career at the amateur level team of AS Origlio. For the next two decades, Jacobacci was head coach in lower league teams with a stint as assistant coach at
Grasshoppers from 2000 to 2003 where he helped the team to win the Swiss championship twice. After a first short spell as head coach at Super League club
FC Sion in 2007–08, he was able to work for a longer time successfully at
SC Kriens and
FC Schaffhausen. With the latter club he managed to achieve two promotions in a row from the 4th to the 2nd tier of Swiss football. 2016 saw his first job abroad at
Wacker Innsbruck. After four more engagements in Switzerland at
FC Wil, a second tme at FC Sion, then
Bellinzona and
Lugano, he coached
Grenoble in France,
CS Sfaxien in Tunisia and
1860 Munich in Germany. 1860 Munich started the
2023–24 season with a win against 1. FC Stockheim in the
Bavarian Cup. He was sacked in December 2023. ==Personal life==