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I have been using Excel since its inception in 1985. I am well-versed in its advanced features including pivot tables and array formulas. I have used Excel to model complex business and engineering systems and have managed big data on the order of 2000 records by 100 fields.
I received an MS in high energy/particle physics from UCLA in 1980. I taught undergraduate physics at UCLA as a graduate student. I worked for Hughes Aircraft/Raytheon Corporation for over 30 years.