Hi Sri,
Head hunting is the best tool to reach the passive candidates. It doesnt involve any major process, it depends only on your creativity and howmuch you can lie. But still i will give you some steps how to do
Steps- Map the targeted companies with their (Company) numbers.
- Try to get that company's extension number. (Domain wise) - Document those details.
Tracing through their extension will give tremendous result, but its very difficult.
3. Cold Calls:Directly call the company and try to reach the person which you are looking for.
4. Participating in walk-ins.
5. Forums/ Community: get leads to do cold calls
I hope this information will help.