Answers to your questions. Execution: Generally no. There are sub-contractors, out-sourcing, COTS, etc. And there may be a program management team of compan

Answers to your questions. Execution: Generally no. There are sub-contractors, out-sourcing, COTS, etc. And there may be a program management team of companies. Software only: The three I've worked on, no. Hardware, software, "mechanisms". Outside of NASA: Yes, although the US government probably has the lock on the sheer number of such programs. Chip-makers, with fab plants, are one sector. Vehicle manufacturers (planes, trains and automobiles) are another. Construction--especially massive high-rises--is probably another.