There is not equivalent in the Civil Guard or in the Spanish Navy Marines; in both cases the top rank is Lieutenant general.

The admiral general's insignia consists of a baton crossed over a saber under a royal crown.

Furthermore, in the sleeves of the uniform, a twisted rope and over this one three 14mm stripes and a star 50mm away.

Being appointed Chief of the Defense Staff means an automatic promotion to the rank of admiral general.

The same happens with the Chief of Staff of the Navy with the exception if the official appointed has the rank of vice admiral, in that case, the official needs to be promoted first to admiral.