[cperciva]

they appear to provide security services for other, smaller agencies within the DOC.

You might even call them an umbrella agency.

[admiral33]

A rare triple pun. Well played.

[Agentlien]

Which am I missing?

1) there's the weather aspect

2) encompassing several responsibilities

3) ?

[admiral33]

Clandestine agents with umbrellas is a common TV/movie trope

[hulahoof]

My next thought was to umbrella corp. from resident evil, there are also similar clandestine orgs in fiction using the umbrella name / logo