These all look great. Thank you. With hopes of steering things in a slightly different direction, here's some generic concepts I'd like to see people work from. Use these images for inspiration.
1. Superhero: Graphic image of business man opening his shirt (i.e., Superman), revealing "Citizen Developer" on undershirt.
https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQ1HYpGhk83ii0_P3Et0fjugdoEB8j-jTcl6BXVj-pRuxr-IlRp3A2. Raised Fist: Maybe an image of a raised fist (empowerment). This is probably over used, but it's an idea.
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcToy0frQyK9JlPmZb2LadTsjj4l6rsiGLYTCM1NfpnnJZJGzvhJ3. Davinci Drawing: Could we tweak the famous Davinci sketch of man. Replace man with picture of a business person?
https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcRjRAXeDdMQANt6e8YtAkqYQYqrTUBQ4jxGjbSHvWLX3fns9oLYNote: I want this image to be cool looking. Cool looking enough to put on T-shirts. So have some fun!!!