Basic Qualifications for Level 4: Bachelor of Science degree in a STEM (Science, Technology, Engineering, Mathematics) discipline with 8 years relevant work experience; or Master's Degree in a STEM (Science, Technology, Engineering or Math) 6 years relevant work experience; or PHD in a STEM (Science, Technology, Engineering or Math) 3 years relevant work experience. This requisition may be filled at a higher grade based on the qualifications listed below: Basic Qualifications for Level 3: Bachelor of Science degree in a STEM (Science, Technology, Engineering, Mathematics) discipline with 5 years relevant work experience; or Master's Degree in a STEM (Science, Technology, Engineering or Math) 3 years relevant work experience.