2011-2012: Competed in freestyle, butterfly and individual medley during junior season ... posted the season's fastest 200 fly (2:01.58) time at the Horizon League Championships ... claimed the season's second fastest 100 fly time (54.18) ... also raced 500 (5:03.53) and 1000 freestyle (11:12:06) ... registered a 2:22.33 in the 200 individual medley.     

2010-2011: Posted the eighth fastest top-ten time in the 100 butterfly with a 53.38 … placed fifth on Valpo’s all-time list with a 1:58.22 in the 200 fly … turned in a season best in the 500 free at the Horizon League Championships with a 5:01.50 … also swam a 10:35.51 in the 1000 freestyle.  

2009-2010 (CSUN): Recipient of the Big West Conference Sportsmanship Award ... posted a fastest season time of 55.37 in the 100 butterfly and 2:01.57 in the 200 fly ... swam the 50 freestyle in 24.01 at the Big West Championships ... turned in times of 58.03 in the 100 free and 2:04.70 in the 200 free.

El Salvador: Swam for club team Ciralo DePortivo Internacional ... earned a silver medal in the 200 butterfly at the 2006 Junior Central American games ... a member of El Salvador’s national swim team in 2007 ... a member of National Honor Society.

Personal: Guillermo is the son of Angel Guillermo Aguilar and Celina Harrison de Aguilar ... major is mechanical engineering ... born Oct. 27, 1989.