Level 4: 11 years of relevant experience in the following areas: computer system research, simulation/ model development and prototyping, software design, programming, computational science, algorithm analysis, design, and reverse engineering/ designing/ developing to include hardware and/ or software. Level 2: 5 years of relevant experience in the following areas: computer system research, simulation/ model development and prototyping, software design, programming, computational science, algorithm analysis, design, and reverse engineering/ designing/ developing to include hardware and/ or software.