We engineer and build ceramic hermetic packaging for high reliability applications, and most of our customers are T1 defense contractors, down hole oil exploration electronics, and medical. You don't find our stuff in the consumer space, as our stuff is not inexpensive. Looking back, I've had my hand (literally, as in held in my hands) in a lot of interesting parts for many programs/platforms over the years:
Radar components: An/SPY, GBR, THAAD, F-15, F/A-18, F-22, C-130, Buff
Imaging components: Hubble, Orion VNS, Gorgon Stare, Argus IS, F-35, Geoeye, Worldview, Panstarrs, LSST, GPSS, OMPS, probably USA-245, a whole slew of cooled and uncooled IR sensor packages to multiple T1's.