You have Operational Technology in your environment and probably need to think about it a little bit.  I was lucky to chat with Kunle who is an expert not just in cybersecurity but also in OT Security.  In this episode he give great information on the differences between IT and OT and what you need to consider when protecting it.

Connect with Kunle: https://www.linkedin.com/in/kunle-adetoro/

Connect with Robert: https://www.linkedin.com/in/robertrounsavall/

Some of the standards and trainings mentioned in the episode:

NERC: https://www.nerc.com/pa/Stand/Pages/default.aspx

IEC 62443: https://en.wikipedia.org/wiki/Cybersecurity_standards#IEC_62443

SANS ICS Training: https://ics.sans.org/

Fortinet ICS Solutions: https://www.fortinet.com/solutions/industries/scada-industrial-control-systems