Integrating management systems

Answer:
Congratulations for your successful certification project. It is nice to know that Advisera could help you and your organization. Yes, you can integrate ISO 45001 and ISO 14001 without ISO 9001.

I would not make any of the standards the leading one. I rather would draw a process map of how your organization works and is it doing that work so that health and safety and environmental issues should be considered. So, instead of “while doing things relevant for the environment I must also consider this health and safety topics” I would follow the approach “while doing our work to fulfill the organization’s purpose of existence we have to consider both environmental and health and safety iss ues”.

The following material will provide you more information about management systems integration:
Article - - How to integrate OHSAS 18001 and ISO 14001 - https://advisera.com/9001academy/blog/2016/10/18/what-is-an-iso-9001-surveillance-audit/
Free webinar on-demand - How to integrate ISO 9001:2015 and ISO 14001:2015 - https://advisera.com/14001academy/webinar/how-to-integrate-iso-90012015-and-iso-140012015-free-webinar-on-demand/
Book – The ISO 14001:2015 Companion - https://advisera.com/books/the-iso-14001-2015-companion/