A Fireproofing Gunner applies specialized, non-combustible materials to surfaces to protect structures from fire damage by using spray equipment, often in industrial settings like oil and gas plants or commercial buildings. Key responsibilities include operating gunning and pumping machines, applying fireproofing materials to meet specifications, maintaining equipment, following strict safety protocols (HSE), collaborating with supervisors and other trades, and ensuring the quality of the application. The role requires strong technical knowledge of fireproofing systems, material specifications, safety procedures, and experience with relevant equipment and project standards.