INBCPE,
If your cell tower is part of a NYSDOT contract, then your welders have to NYSDOT certified. You need to call the NYSDOT MetalS Engineering Bureau (518) 457-4526 to make arrangements for having the welder(s) certified.
Normally on a private project, it's up to the owner to specify the certification needed unless state law such as the requirement cited by METENGR governs. The NYS Building Code Section 1704.3.1 cites AWS D1.1 as the basis for inspector qualifications.