You need to supply photos, exact text (copy), size, vector logos to get a viable poster.
You did not mention what you actually do or who you are.
Designers need all the components to put something together for you.
Sorry to have to ask, but we need all this stuff to start with.
If you review other poster contests you will see what I mean.
Thanks

Hello. I am hiring designers to find photos. in terms of text/what we do/ and who we are , please review the brief. I have posted the images I have and have had submissions sent with said images. If the brief doesn't work for you, don't take the job. Thank you and have a good day.

hi, the budget is for 1 collateral or all mentioned in brief? i mean 1 poster or 1 flyer or is for postcard, flyer and a poster? thanks

All of it. I plan to use the same material for a poster, a postcard, and or flyers.