What certifications are needed for an OSHA Inspector?

I've had dealings in this area since I retired 20 some years ago. Most colleges and some local community colleges provide training and certificates. The classes should be listed under Occupational Safety Training. I regret there wasn't available training in this area when I left the service. Try GOOGLE search for training in this area. My civilian career placed in this arena having to deal with many aspects of safety. Also search your local area for the nearest office in your state and try to network with them to help get through the USAJOBS review process and be selected for an interview. Other areas you should look into are as follows:
HAZMAT CERTIFICATION
MINE SAFETY OPERATIONS
USDA FOOD SAFETY OPERATIONS
RAILROAD OPERATIONS
OSHA- This agency has many facets to their mission. Go to their website and see what areas they are responsible for and then search for specific training in those areas.

hope this helps! Let me know if I can help in any way? Good Luck

Janell,

Here's some resources: http://m.osha.com/courses/30-hour-construction.html

Also, I recommend that you start engaging with recruiters for companies that you're interested in. Ask about their corp culture & make sure you align with their mission.

Start looking into environmental sciences or environmental health programs.