Positions in this series require the application of some of the principles, methods and techniques in a specific or limited area of engineering, and a practical knowledge of the construction, application, properties, operation and limitations of engineering systems, processes, structures, machinery, devices or material, and as required, related manual, craft, instrument operation, mathematical, graphic or management skills and abilities. Engineering-Support Experience:Two (2) years for Level III, three (3) years for Level IV of work experience in one OR a combination of the engineering-oriented functions such as inspection, testing, designing, surveying, drafting, and construction, which required the knowledge of engineering terminology and the ability to use mathematical skills in the solution of engineering-support or engineering problems.