You might post this question in the "Welding, Bonding & Fastener engineering" forum, and let them know what part of the country you're located.
There are a number of companies here on the West Coast that provide these services if you intend to apply for certification as a SS&W inspector. I no longer train individuals, but I do provide instruction to companies. I also perform technical seminars for several professional and code organizations.
If this is for your personal achievment or for your company, I recommend you contact AISC at AISC.org or the ICC at ICCsafe.org online. I also know someone here on the West Coast who has a very high pasing rate for individuals seeking their ICC special inspector certification. If interested, post a contact number or addy.
