ISO 9001 covers quality management, ISO 14001 covers environmental management and ISO 45001 covers occupational health and safety. A provider certified to all three has documented systems for consistent service, reduced environmental impact and safer work, checked by an accredited auditor.
What each standard covers
- ISO 9001: quality management systems. Consistent processes, objectives, audits and continual improvement.
- ISO 14001: environmental management systems. Managing environmental impacts such as waste, chemicals and resource use.
- ISO 45001: occupational health and safety management systems. Identifying hazards, controlling risks and protecting workers.
Why they matter to a client
Certification shows that a provider has documented systems and is audited against them. It is not a guarantee of performance on your site, but it is a strong signal that safety, quality and environmental issues are managed on purpose.
How to check certification
- Ask for the certificate, and check the scope covers the services you need.
- Check the certifying body and the expiry date.
- Ask how the system is used day to day, for example for inspections, incident reporting and training.
Certification is a baseline
Use certification together with references, reporting and a site walk. Strong providers can show how their system produces results on real sites.
Progress Services Group operates ISO 9001, ISO 14001 and ISO 45001 certified management systems.
Frequently asked questions
Is ISO certification a legal requirement?
No, but many tenders and government contracts require or favour it.
Does certification cover subcontractors?
Only if the provider's system includes them. Ask how subcontractors are selected, inducted and monitored.
This page is general information about the topic and is not legal, financial or safety advice. Requirements vary by state, site and contract. Last reviewed 30 October 2026.