Keiller made his debut in the professional team of Internacional in the 2nd Semi-Final match of 2017 Campeonato Gaúcho, replacing the injured Marcelo Lomba, against Caxias.
In the penalty shootouts, Keiller defended two charges, classifying the Internacional for the Final.
[3] On 2022, Keiller returned to Inter, becoming the first-choice goalkeeper by the end of the same year in the place of the injured Daniel.
[4] On 2024, after Sergio Rochet became the first-choice goalkeeper on Inter, Keiller was again loaned, this time to Vasco da Gama.
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