Organizations
Central organizations
InterDimensional Security
Corporate Affairs
Criminal Investigations
Arron Kepler's department. They appear to mostly be focused on investigating crimes, both inside and outside IDS. It's made clear Arron is not their only director, he's thus far the only director we've seen in the organization. He's therefore likely in charge of all of C.I. in Malsa, at least.
Situation Containment
Biana's organization. They seem to mostly be focused on creating situations these days. More generously speaking, they seem focused on a few situations that represent black eyes to them, and do not seem to be concerned about the consequences of them trying to 'contain' those situations long after they have moved past any plausible containment.
Public Affairs
World Military
Cross-dimensional organizations
PACT
A group of the largest corporations on Palindra, though many of those are now interdimensional corporations.
Palindra organizations
Arpon organizations
Malsa Organizations
Avon
One of the interdimensional corporations in PACT. They have a healthy bleeding edge small electronics business, with unhealthy levels of illegal research. They may be headquartered in Malsa, but it's difficult to say. A couple of their C-levels, Ryn "Tomorrow" Koko and CEO Ikirium Avon, appear to reside in Malsa, so they're listed there for the moment.
Magic Security Bureau
Headed by Tyler Weber, the M.S.B. is Malsa's latest bureau. It is specifically focused on national security involving magic, which just happens to have a 100% overlap of everything within Arron Kepler's department's jurisdiction. While the M.S.B. appears to have some amount of jurisdiction that's outside of IDS's concern, they have not had any of that show up so far in comic.
Levenworth
The school where all of the Malsan schoolchildren Kyle mentioned as superior to IDS special agents learn how to beat IDS special agents. It's probably not an actual class there... Yet. The headquarters of the MSB are there, which makes it more like an after school club than Peter probably realized at the time he said it.