News
GSTS ISO and ACS Accreditations: Leading in Quality, Safety and Service
At GSTS, we are proud to hold multiple ISO and SIA ACS accreditations, reflecting our unwavering commitment to quality, safety and service excellence. These internationally recognised certifications demonstrate our dedication to maintaining the highest standards across all areas of our operations.
GSTS ISO and ACS Accreditations: Our Achievements
- ISO 9001: Quality Management System – Ensures consistent quality and customer satisfaction through rigorous quality control processes.
- ISO 14001: Environmental Management – Highlights our commitment to sustainability by minimising environmental impact through efficient practices.
- ISO 45001: Occupational Health & Safety Management – Prioritises the safety and well-being of our employees, clients and stakeholders.
SIA Approved Contractor Scheme (ACS)
Being an SIA Approved Contractor underscores GSTS’s dedication to excellence in Manned Guarding, Healthcare Security and CCTV Operations. This accreditation provides reassurance that our private security services meet the highest industry standards. By adhering to stringent guidelines and client-focused practices, GSTS ensures peace of mind for our clients.
At GSTS, these certifications represent more than just compliance. They are a testament to our relentless pursuit of improvement, innovation and delivering value to our clients. By implementing robust quality control, sustainable practices and safety protocols, we ensure that our operations align with the highest global standards.
To learn more about ISO standards, visit the ISO Official Website. For more about the SIA Approved Contractor Scheme, visit the SIA ACS Official Page.
To discover more about our accredited services, visit our Healthcare Security Services page.

Outstanding teamwork recognised at MFT with Diamond Award
Welcoming our new Workplace Welfare Champion – Kim Ashcroft