Awarded the Honoris Crux for his actions and bravery on 21 May 1985, during Operations Argon

• Queiroz served in the South African Special Forces from 1975 to 1990.
• Decoration: He was awarded the Honoris Crux, the highest military decoration for bravery in South Africa, for his actions during Operation Argon in May 1985, in Cabinda, Angola.
• Acts of Bravery: During a reconnaissance mission, his team was located and attacked. After the patrol leader and other members were separated or captured, Queiroz assumed command, guided the remaining five men to a safe position under intense enemy fire, and managed the situation despite the wounded.