I have been using excel for x number of years for different purposes. I am well verse when in comes to creating all sort of charts, waterfall included. Same goes with excel formulas, apart from knowing all formulas, I am familiar with optimization techniques which will make the file load faster.
I do learn fast and when it comes to my work ethics, I always make sure that I deliver my work on time and that my work is accurate and perfect. I am confident that I will be able to meet your expectations.