Recruiting interviewees for a research study (Chicago)

Hi all,

I am doing my PhD at University of Illinois at Chicago and working on my dissertation proposal. The research study is about the partnerships small to mid size IT vendor firms for service provision or for sourcing of internal IT operations, and how they integrate location into their partner choices. The location is scoped as Chicago metropolitan area.
For that purpose I want to recruit senior IT executives of these IT firms sampled above to make interviews. I need to start with pilots in June. The interviewees will be an hour at maximum. I'd appreciate any help in terms of access to those firms and to the IT executives.

Thank you, Melike