As a cartographer he studied and made maps. This entailed combining science, aesthetics and technique. This kind of map making was done so that the militaries had accurate and up to date study of the area of theatre. He was also an Intelligence analyst, where he examined and distributed data relating to enemy forces, looking for relevant information about their location and intentions. They also identify possible sites of battles. Analysts compare new information with existing intelligence, sharing similarities and inconsistencies they find with the combat commander. They also maintain cross-referenced files of important findings.
Cartography School was 14 weeks, where he learned hydrography, terrain and soil analysis, erosion and geology. Learning to be an intelligence analyst consisted of a intense 13 weeks of individual instruction, in-classroom sessions, and field exercises. Basic skills required include computing systems proficiency, critical thinking, and knowledge of military symbols. Aspiring intelligence analysts must take the Armed Services Vocational Aptitude Battery and score at least 101 on the skilled technical section.