best thing to do is to find out the Aviance contact numbers or email address for the airports your interested in, usually this is found on the airports website under the ground handling companies / passenger services
could also try
Aviance - Contact Us - Become a Member and selecting "other"
im sure theres someone on here that could help u a little more
i wouldnt expect any1 at the airports you mentioned taking people on until summer, and even then it'll be temporary contracts until winter