Luis Dormay was the first captain of the Royal Company of Guardiamarina, which was set up in 1717. He was brigadier and captain of the 'Garde du Corps', a French royal formation. Later, he was promoted to lieutenant general. He died in service in 1737.
Dormay dressed in the seventeenth century style, wearing a wig and the Captain General uniform - a navy blue jacket with gold trim, crimson cuffs with gold decoration and an ornate crimson vest. The uniform is crossed from top to bottom and from left to right with a crimson band, symbolising his rank. In his right hand he carries the Captain General's baton. The label at the bottom identifies him and lists his responsibilities.
The work is typical of the eighteenth century Spanish School. Portraits of this period maintained the aesthetic of the previous century, which comprised dark and neutral backgrounds that made subjects stand out.