How to add DOD root certificates to macOS?

How do we add DOD root certificates to our Mac's?

I visited the information Assurance Support Environment site (iase.disa.mil) looking for public key infrastructure tools (Home > PKI-PKE > Tools) and did not find any for macOS tools.

My personal system is running macOS Sierra 10.12.6

Thanks in advance and apologies if this is a duplicative question