Security and Clearances:

Cisco Certified Information Security Specialist (CNSS 4011)
The CNSS 4011 Training Standard has been re-certified by the United States Government National Security Agency (NSA) and the Committee on National Security Systems (CNSS) as meeting the 4011 training standard for information security professionals in the federal government.

Cisco Certified Security Professional (CCSP)

Cisco Certified Advanced Information Security Specialist (CNSS 4013A)
The National Security Agency (NSA) and the Committee on National Security Systems (CNSS) recognizes that the Cisco security courseware meets the 4013A training standard. This advanced standard is intended for System Administrators responsible for the security oversight or management of critical networks. This formal NSA and CNSS certification gives Cisco the authority to recognize engineers who have met the training standard.