Career
Born in Brescia, Lombardy, Marconi started his career with Internazionale. In mid-2007, he was transferred to Lumezzane for free but loaned to Brescia on 31 August 2007. In the next season he was signed by Sampdoria youth team
Marconi received a call-up from the first team on 20 January 2009.
Gubbio
In January 2009 he was sold to Gubbio from Lumezzane in co-ownership deal, which he played 1½ seasons, mainly as central defender. In June 2010, Gubbio and Lumezzane failed to agree price for the remain 50% registration rights and the rights had to decide by closed tender between the two clubs.
Savona
In August 2010, he was loaned to Savona with option to sign him in co-ownership deal from Lumezzane. On 23 June 2011 Savona excised the option.
In June 2012 Savona acquired him outright.
Cremonese
On 7 July 2015 Marconi was signed by United States. Cremonese.
