You must have an active TS/SCI with a Fullscope Polygraph.
1) Vulnerability Researchers
Key areas of focus include:
Reverse Enginering
Vulnerability Research
Wireless and Network Communications
Hypervisors
Malware
Mobile/Embedded Development
Win32/Linux Kernel development
2) Mobile Security Analyst/Engineers
Requirements:
6+ years of experience working with debuggers and disassemblers
6+ years developing code in C or C++
3+ years developing or analyzing ARM Assembly
Strong knowledge of wired and wireless networking protocols
Strong knowledge of low-level Mobile internals and drivers
Experience with WLAN drivers
Experience working with 802.11, Bluetooth, or WIMAX protocol stacks