I am currently a Director of Data Science at Walmart Labs, working on supply chain problems such as demand forecasting and inventory replenishment. Prior to this, I worked for the now-defunct solar power company SolFocus, which built large photovoltaic arrays in various remote places for electricity generation. My main responsibility was forecasting how much energy we'd get out of a particular site. And reliability work too, of course. Before that I worked for a number of years in Hewlett-Packard's Strategic Planning and Modeling (SPaM) group, an industry award-winning internal, and occasionally external, consulting organization, and as an independent consultant.