[Big Ideas]

Comments are "engineering" perspective. First, generally a good design and good commonality between the three panels. Now for details:
1) Think about who you want interested in the posters. The top should be a BIG hook to entice reading. The "meeting notice" has to be a strong call to action. (the punch line of why they just spend the time reading.
2) 13.8 million is strongest opening-- "Non-engineering Roles" is the weakest.
3) Lots of reading! I wonder if average HS student will stand still and take it in.
4)Left picture should be MORE FUN. Maybe a cheering drive team in competition. The people on the left should be looking INTO the poster.
5) Lots of "NOT" words. Try to ALWAYS use the Positive language.
6) In "non-engineering: "real world engineers DO deal with budgets, marketing, sales, expectations, and communication. Robot is not the Start. Its just the theme for the team to focus activities around.
7) Long prose can be changed to short positive bullet points.
8) Make sure "call to action" is is BIG TYPE and easy to find. Not embedded in the text.

Keep at it. Poster design is a special discipline. Find the art/graphic arts/photog teacher and ask for input. Hand it to freshmen and see where their eyes track, how long they spend reading.

Make 2 more in the series to hand out to sponsor companies to cover mentors and sponsorship.

Recycle paper is a good concept but these would be better on a bright white 40-60 lb gloss paper, especially if a lot of words remain.

Can you do a 1/2 page version for school news paper or sponsor paper/newsletter?
Keep it up.