Arnold is a familiar face on television, having done ads for several products like Globe Telecom, Lucky Me, San Miguel and more. However Arnold is not stranger to the world of theater. Credits include Dulaang U.P’s St. Louis Loves Dem Filipinos, Hibik at Himagsik nina Viktoria Laktaw and winter’s Tale: Atlants’ Rent, Actor’s Repertory’s Romeo and Juliet and florante at Laura; Gantimpala’s Grethology, Kanser, Sinag and pepe and Pilar; Chase International’s Once on this Island,among Others. He has also produced and composed songs for Regine Velasquez (Perry’s Will), Ogie Alcasid (Hanggang Saan Hanggang Kailan), Born Diva Album (Di Man Lang Nagpaalam), K and the Boxers (Ikaw Lang), Anton Diva (Paano Na), Erik Santos( You and Kung Maalala Mo.) His song Paano Na? won him the siler prize in the 200 Metro Pop Song Writing Festival, and in 2003, his composition Kung Ako Ba siya? Won the Texter’s Choice Award and was a finalist in the first Himig Handog Love Song Festival. Most Recently, Arnold got nominations as Best Stage Actor from Aliw Award for his portrayal Ang Bayot, and Maranao at ang Habal-Habal sa Isang Nakakabagot na Paghihintay sa Kanto ng Lanao del Norte.

Independent Short/ Full Length Film Credits(2009):
Puntod (2009), Astig (Mga batang kalye) (2009) , Ugat sa Lupa (Roots on Earth) (2009), The Forgotten War (2009), Pera-perahang lata (2009) , Padyak (2009)

Previous Independent Short/ Full Length Film Credits:
Pisay (2007), Huling araw ng linggo, Ang(2006), Kagat ng dilim (2006) Big Time (2005), Condo (2008), Barako(2008), Adela(2008), Imoral(2008),

Mainstream Film Credits: Luv Text (2001), My Bestfriend's Girlfriend(2008), In My Life (2009), Karera (2009),

T.V. Series:
"I Heart Betty La Fea" (2008), Iisa Pa Lamang (2008),"Krystala" (2004)