We have 2 SROs that came from STE to SRO. They were given credit for the 2 year military RO/EWS reactor requirement.
That being said, the NRC has really ratcheted down on what meets this requirement..., IE before, it was OK to say you've held an EWS qual for 2 years, but now, they want documentation that you actually filled the position for 2 years.
The bottom line is that there is no telling for sure where the NRC currently stands on civilian military equivalencies, without actually applying for the license.
If I were you, I would apply for direct SRO and they'll be able to better tell you if your STE will count, or not.
It used to, but that doesn't mean that it still does.
I know that probably wasn't very helpful, but it is what it is.
Justin