volunteering in ngo/industry working in sewage water treatment plants

Hi! I m harprit virk from Punjab india and currently associated with Parmeshwar contractors, dealing in design and manufacture sewage treatment plants for industrial complexes,hotel,resorts,hospital and residential townships in cap. ogf 10KLPD to 200KLPD. I m also involved with a NGO creating awareness in rain water harvesting and water based issues. In order to explore new technologies and ideas  i decided to work/ volunteer in similar line of waste water services in any part of world to know the latest practices and implement the same here in punjab.currently my experience is to address people on water based issues to create awareness and fabricate the sewage treatment plants and marketing as  well as supervision of installations. Pl let me know for any opening oppurtunities paid or volunteering anywhere, thanx