Who are we?

The TSS Family of Companies is one of the largest independent laboratory and hospital service providers with locations across the United States. Our customers include leading life sciences and healthcare companies and renowned research institutions. We are a leading provider of environmental monitoring solutions and testing, calibration, and certification services for controlled environments, medical gas systems, and laboratory instrumentation. Our Family of Companies includes Technical Safety Services (TSS), Evergreen Medical Services (EMS), and Cornerstone Commissioning.

Evergreen Medical Services (EMS) is a leading medical gas, indoor air quality locations across the United States. Our customers include leading life sciences and healthcare facilities including hospitals and surgery centers. We are rapidly growing and looking for additional passionate and talented employees to join our team and partner with EMS’ customers who are doing dramatic work f...