He had roles as Walt Moore on the TeenNick TV show Gigantic, and as Danny on Disney Channel's As the Bell Rings.

Oller appeared in both seasons of the Disney Channel short comedy series As the Bell Rings as Danny.

[7] In 2010, Oller had a supporting role in the Lifetime drama movie Unanswered Prayers, which was based on a song by Garth Brooks.

[17] In 2016, Oller appeared as Ian in romantic series Relationship Status co-starring Mekenna Melvin, which premiered on Go90 app.

[18] In 2012, Oller and his former Gigantic co-star Malcolm David Kelley joined up to form the pop duo MKTO.

A double A-side single including two brand new tracks "Hands Off My Heart/Places You Go" was premiered exclusively on Billboard on March 9, 2016.