You can find the names of people who work in this field or companies who hire this occupation from:
your yellow pages or local business directory (ask resource center staff for this)
the local education institutions could connect you with graduates in this field
your local union, association or apprenticeship office (found on your labour market site or yellow pages)
your network of friends, family or acquaintances.
Don’t forget that family and friends often know someone who knows someone who can connect you with someone to interview. It is a nice way to get started with your research task. Make a map of your family, friends and acquaintances whom you could call on for help: