He joined the People's Party in 1991[2] and served as provincial president of the party's youth organization, Nuevas Generaciones, from 1994 to 1995. From 1996 to 2000, he was the party's Secretary General in Jaén, and in 2000, he became its president. Between 2002 and 2015, he was Deputy Secretary General of the Andalusian People's Party, responsible for Studies and Programs.[2] He was a member of the Andalusian Parliament during the 7th and 8th legislatures. In 2011, he was elected senator for the province of Jaén, a position he held until 2015.[3]
In 2017, he stepped down as provincial president of the People's Party in Jaén, endorsing Juan Diego Requena as his successor. Requena won in a controversial primary election in which Fernández de Moya and the then-General Coordinator of the party in Jaén, Miguel Contreras, allegedly committed irregularities to prevent the victory of Miguel Moreno Lorente, the mayor of Porcuna, who was favored by party members.
In the 2011 municipal elections, Fernández de Moya led the People's Party list for the Jaén city council and secured an absolute majority.[4] He took office on June 11.[5] In 2015, he was re-elected but without an absolute majority. That same year, he was nominated as the lead congressional candidate for Jaén in the general elections. Following this decision, it was announced that he would leave the mayoralty to focus on the national elections, and Francisco Javier Márquez Sánchez, the councilor for Urbanism and Housing, would replace him. On November 23, 2015, he formally resigned as mayor.[6]
After the general elections, he secured a seat in the Congress of Deputies. He served during the short legislature, and following the dissolution of the Cortes and the subsequent repeat elections, he was re-elected. He resigned in November 2016 after being appointed Secretary of State for Finance.[7]
On 11 November 2016, Minister of Finance and Civil Service Cristóbal Montoro Romero appointed him Secretary of State for Finance. Following this appointment, he resigned from his seat in Congress and was replaced by Javier Calvente Gallego.[7]
In June 2018, he was dismissed as Secretary of State for Finance[8] and succeeded by Inés Bardón after a motion of no confidence.[9]
After his dismissal as Secretary of State for Finance, Fernández de Moya left active politics and returned to his position as a professor at the University of Jaén.[10]
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