Born in Camaná, Oropesa worked at Universidad San Martín, América Cochahuayco, Atlético Minero (where he led the club to the Segunda División in 2008 after finishing in the semifinals of the Copa Perú), Deportivo Coopsol, and the Peru national under-20 team as an assistant.
In 2020, Oropesa was Jahir Butrón's assistant at Alianza Atlético, before being returning to a managerial role on 11 January 2021, with Sport Chavelines.
[13] On 4 November 2021, despite achieving promotion to the Liga 1 as champions, Oropesa left Atlético Grau after failing to agree new terms.
[14] He was named Unión Comercio manager on 18 December,[15] and also led the side to a promotion to the top tier; on 22 November 2021, he renewed his contract.
[17] He spent nearly a year in charge of Juan Aurich before returning to his previous club on 3 June 2024,[18] but left due to health issues on 9 August.