[2] On 10 September 1982, he was appointed Director-General for Cooperation with Regional Regimes by Luis Cosculluela, minister for Territorial Administration.

[2] From 1984 to 1992, he has secretary-general and chief of the legal service of Barclays and, from 1992 to 1995, he worked as a lawyer in the Uría Menéndez law firm.

[2] During this time, he supervised José Manuel de Zuleta y Alejandro, 14th duke of Abrantes, who served, unofficially, as private secretary to Princess Letizia.

When Felipe ascended the throne in June 2014, Alfonsín and Zuleta were promoted to private secretaries of the monarchs.

[5] Later, he was awarded with the Grand Cross of the Order of Charles III[6] and was appointed honorary member of the Board of Trustees of the Princess of Asturias Foundation.