Thanks for the direction. Has anyone read this CTS-D prep book? It looks like it contains some of the content I'm looking for.
https://www.amazon.com/CTS-D-Certified-Technology-Specialist-Design-Guide/dp/0071835687
I know many of the skills I want to gain/refine are from on-the-job experience, however I'd like to have a sufficient level of comprehension before opportunities present themselves.
Edit: missed a word.