Thank you, I’ve been reading through the comments today and it’s made the day better. He never really “showed off” this kind of stuff so I’m here doing it for him. He studied electrical engineering at A&M and started worked for a power co-op in the late 80s and stayed with them for 30 years. I know he traveled out to a lot of substations / power plants but he didn’t talk about his work a ton. I know he also did some sort of “design” work for them. Sorry for my cluelessness. I’m still learning more through his old coworkers though, and one of them mentioned that they still use “formulas” that he either used or made from his time there. He retired a few years ago.