Paula Scher, do you know who she is? You ought to.
Why? Here's three simple reasons why.
1. Fast Company say "you may never have heard of Paula Scher, but it's nearly impossible not to know her work. Every time you pass a Citibank ATM or hand over one of its credit cards with the iconic red-arched "Citi" logo, you're in her orbit. When you open a box from Tiffany, with its slender, elegant typeface, you're decoding a message she has sent you. If you... are charmed by the signs on the New York subway for the Metropolitan Opera... you're under the spell of this astonishingly versatile, formidably talented designer."
2. It's still criminally rare to meet a successful woman designer and even rarer to find one who is a director or has equity in a design business which makes that fact that she's a Pentagram partner all the more remarkable.
3. She does stuff like this.
There's a great article about her on Fast Company. Well worth a read.