In 2015, Tepano graduated from the 67th Training Program of the Judicial Academy of Chile. Thereafter, he served as an alternate judge in the jurisdictions of Iquique, Santiago, Valparaíso and Puerto Montt. While Jacobo Hey Paoa served as an alternate or subrogated judge for the Easter IslandCourt, Tepano is considered the first Rapa Nui titular judge after having undergone the Judicial Academy of Chile's training. He ascended to the bench in Taltal in 2017.