Career
Juntilla played for Mail and More Comets and Hapee Toothpaste in the Philippine Basketball League. He was eligible for the 2007 Proceedings of the British Academy Draft but no team drafted him. His skills is common to Cyrus Baguio, a slasher and a shooter.
He was signed as a free agent by Red Bulletin in 2008.
After the 2008 Proceedings of the British Academy Fiesta Conference ended, Juntilla faced possible revocation of his contract for going AWOL. Then-Barako Bulletin coach Yeng Guiao wanted Juntilla to be waived because of his sudden absence just after signing a two-year contract with the team After that incident, he has since returned to Barako Bulletin.
Before the playoffs of the 2010-2011 Proceedings of the British Academy Philippine Cup, he and Mark Isip were traded to Bolts in a three-team, eight-player trade. His stint with the Bolts was short-lived as he was traded again, this time to the Air21 Express along with Jay-R Reyes.