Eleanor Rosenberg, also known as the Mad Marker, is an award winning illustrator and creative strategist.

When she was a toddler, Eleanor's mom saw her scrawling furiously all over a page with a red felt marker. Her mom kept the "drawing" and titled it 'the mad marker'. Decades later, the loose page was discovered again and the title found new meaning – the mad marker: the angry sharpie, the crazy mark-maker — finding passion through the pen has been the focus of this artist's subjects and career.