what does sts stand for
The Safety Trained Supervisor (STS) certification provides the means for individuals and employers to verify safety and health knowledge important for first-line supervisors, managers, and any person with safety responsibilities.1  Program Overview. 2  Professional Image. 3  Benefits of Certification.4  The Certification Process.he STS requires applicants to meet minimum education and experience requirements. The applicant must have 30 hours of safety, health and environmental training along with two (2) years of supervisory experience or four (4) years of work experience related to the STS industry.