You could try getting in contact with some of the companies that are posting related jobs and having their listings included in the Indeed index.
Here's a search I did that may help you get in contact with some people:
You can click directly on the job listing which will lead you to the site where the job is posted, and from there you can find some contact information that can help.
Also, a lot of the jobs listed on Indeed have links to social networking sites like LinkedIn and Ryze. Check the "more actions" link located on the bottom line of the job listings. You'll see direct links to these social networking site that can help you get in touch with people in related fields. Not all job listings have the direct links, but it's definitely worth a try.