As an ex-Auditor, I'm using MS Excel for daily basis, used to process big data with multiple rules, multiple links and data from a different sheets, creating trends, presenting chart, data extraction, pivot table and complex calculations, filters, and formulas. I also have experience in data cleansing in my previous job assignment when migrating our SAP database to Oracle database.
Now, to expand my skill and knowledge in quality and project management, I'm taking Six Sigma and Project Management training and certification.