Sigma provides QA/QC Inspectors who are experienced, senior level professionals with interdisciplinary academic, scientific, and industrial certifications/memberships from standards organizations such as API, ASNT, AWS, CSWIP, PCN, ASME, NBIC, NCCER, IEEE, ANSI, EEMUA, AMPP, NACE, SPE, PRCI, AIA, NFPA, and TDLR.

Certified professionals are available for call-out or long-term assignments. Sigma provides turnkey QA/QC inspection and reporting services complete with equipment, consumables, vehicles (mileage), and accommodations required to perform Quality Assurance / Quality Control.