[4] In 1936 Vaamonde was appointed architect-conservator of the Museo del Prado, and in 1937 was a member of the Central Treasury of the Artistic Board, chaired by Timoteo Pérez Rubio(es).

[4] In August 1936 the museum's deputy director Francisco Javier Sánchez Cantón(es) had the paintings moved to the lower parts of the Prado.

The plan and photographs were published in Mouseion, the press organ of the International Office of Museums directed by Euripide Foundoukidis, in October 1937.

[6] Jesús Martí Martín and Vaamonde helped transfer the masterpieces of the Madrid museums to Valencia, where they avoided being destroyed by Franco's artillery and bombers.

He was in charge of security of the museum, reception of the masterpieces moved to Valencia, and preparation of places where the works would be conserved in that city.

[13] He founded and organized the company's architectural services, initially concerned with design and planning of homes, hospitals, clubs and schools, which until then had been purchased prefabricated or pre-designed.

His last project before he retired was the Shell de Chuao building in Caracas (1957–60), the new headquarters of the company, in collaboration with Diego Carbonell and Miguel Salvador.

[11] Unlike the former Shell headquarters, which had a Beaux Arts style, the new building had an austere exterior with impeccable lines that aimed for neutrality and isolation from its surroundings.

[13] In 1973, with the help of his family and Justino de Azcárate, Vaamonde published an account of the work done by the team to protect the Spanish artistic heritage during the civil war.