Yeah, but if you have the same "big boss" (NG) it may be a bit more acceptable for your boss to see you working on stuff for the NG. I'm still trying to figure out the "Technician" thing, as the Navy doesn't seem to have an equivalent. One of my mechanics used to be a "Tech" for his day job.
A little different if I would get a call for some TRA reports for the HMFIC of the NOSC, and expects me to work half the day on it, and he needs it by 1800, and I'm at my civ job for (Medium Sized Oil Company), and I also have stuff they need done TODAY for a large client. (ExxonMobil)
Taking a phone call and ironing out travel arrangements or answering a "hey can you take a XC from Corpus to wherever this weekend, stud wants to go to Denver and the IP is med down" are one thing. Doing multiple hours of work during the work day is another.
For the SELRES guys that are just drilling in a Hardware Unit (VAW-77, HSL-60, HSC-84, SAUs, etc) what is your workload when you are not on the clock. I'm assuming FITREPs and such would be done on my time if I'm not at the drill site when there are due, and the usual phone call/email about "hey have you been to X training".