Even less - it was asking for some tech support from Apple to learn how to hack Apple Hardware with their own (Bechtel) engineers - the actual hardware/software was done by Bechtel. Given this particular engineer is talking about it - they didn't have to undergo security clearance (if they had, they wouldn't be talking about it. Ever.)

All apple did was provide a little bit of JTAG/Build/Source Code support. The rest was up to a third party.