Ensuring compliance, people safety, and test accuracy in life sciences and healthcare

TSS Family of Companies

We deliver regulatory compliance and safety solutions to the world’s leading life science and healthcare facilities. Our customers are doing dramatic work focused on improving the human condition. We are a key enabler.

Interested in joining the TSS Family of Companies team? At TSS Family of Companies we promise our clients the highest quality and best customer service in the industry. If you share our passion for excellence and possess the qualifications necessary, we encourage you to consider the opportunities we have available.

Apply Now

Technical Safety Services is the largest controlled environment (e.g., cleanrooms, fume hoods, biosafety cabinets) testing and certification company in the United States and has been in the business for over 50 years. TSS is an ISO 9001-2015 Certified Company and has ISO 17025-2017 Accredited Calibration Laboratories.

Cornerstone Commissioning is an industry-leading commissioning firm offering independent laboratory facility performance services for design teams and building owners by verifying facilities meet owner’s project requirements. Cornerstone specializes in biocontainment facilities, including BSL-3 laboratories.   

Evergreen Medical Services is the nation’s leading compliance and life safety service provider to healthcare facilities through the delivery of environments of care solutions with a focus on environmental monitoring and medical gas systems.


Throughout our family of companies, we share a set of values that link all our employees together. We love to recognize and celebrate individuals that live by them, ensuring we are the best partner for customers.

Our Values

Employee Benefits

We offer a competitive and full benefits offering including Health, Dental, Vision, Life Insurance, Disability Insurance, Retirement Savings with company match, and Employee Discount programs.

Employee Benefits

Apply Now


Hear From Our Team


Morgan Hulsey
Vice President/General Manager, Technical Safety Services

Brandon Ansaldo
Field Service Technician, Technical Safety Services

Eddie Cortez
Field Service Technician, Technical Safety Services

Edith Dang
Field Service Technician, Technical Safety Services

Jason Burgess
Field Service Technician, Technical Safety Services

Alex Ornet
Field Service Project Manager, Technical Safety Services