NSA

The National Security Agency are an American intelligence agency that protects the nation's electronic communications and cracks everyone else's electronic communications. They can be pretty handy when electronic aliens are invading you!

Their name is usually shortened to NSA, not to be confused with the National Security Advisor.

Fiction

Dreamwave Generation One continuity

The Transformers Trilogy

The Followers had a spy, Franklin Townsend, within the NSA. Transformers: Hardwired Transformers: Annihilation

G.I. Joe vs. the Transformers continuity

Mainframe started life as an NSA officer. The NSA picked up an image of one of Cobra's enslaved Transformers. G.I. Joe vs. the Transformers issue 2

Years later, agents of Cobra-La pretended to be NSA in order to retrieve Doctor Mindbender. G.I. Joe vs. the Transformers II issue 4

Live-action film continuity

Australian expatriate Maggie Madsen used to work for the NSA until she started rewriting her supervisor's conclusions in reports (and was right). When the Decepticons invaded, the NSA were involved in trying to decode their communications. Transformers