Guillermo is originally from Jujuy, Argentina and moved to the United States in 2004.

He grew up playing Div II and III (semi-pro) teams in Argentina from the age of 15 to 21.

In 2004 when Guillermo moved to US, he played on the Salem International University, he was first team all-conference, all region, and MVP in 2006.
Guillermo also Played for C. D.  Mixco (Guatemala) 2008.

He currently holds a "C" National License.  He has coached youth as well as collegiate teams.
In 2007 he was the Assistant Coach at West Virginia University Tech.  From 2009-2010 Grad Assistant at Salem International University.

Currently he coaches multiple teams in HYS, Boys Varsity Head Coach at Herndon High School, and VA Boys ODP Academy.  

Guillermo is currently the Head Coach of Herndon FC Ciclones Black '05 and Herndon Argentinos Juniors Black '02.

The Herndon FC Athletics graduated Spring of 2014 with many players advancing to collegiate play.