Requires the ability to prepare correspondence, reports, forms, evaluations, procedures, charts, surveys, articles, bid specifications, brochures, news releases, handbooks, budgets, etc., using prescribed formats and conforming to all rules of punctuation, grammar, diction, and style. Requires the ability to apply principles of logical or scientific thinking to define problems, collect data, establish facts, and draw valid conclusions to interpret an extensive variety of technical instructions in mathematical or diagrammatic form and to deal with several abstract and concrete variables.