I've encountered several things in regards to GDR tech teams... To be honest, it doesn't seem like they had much industry, at least not much geared towards war. Perhaps this is the legacy of the Soviets dismantling virtually all useful German industry and taking back into the USSR in the aftermath of the Second World War?
I have found a LOT of useful doctrine research organizations and such, but virtually nothing that will help fuel the development of better tanks or anything along those lines. It is worth noting that the East Germans basically received their weapons from the USSR. Weapons that unlike those sent to, say Bulgaria, were state of the art Soviet weapons, not purposely downgraded models intended to export to untrustworthy allies or third world client states.
Here's what I have as of now-
GDR (East Germany) tech teams-
Nationale Volksarmee [National People’s Army] (skill 6) centralized execution, general equipment, infantry focus, large unit tactics, and training
Landstreitkrafte [Ground Forces- NPA] (skill 5) centralized execution, combined arms focus, individual courage, large unit tactics, and training
Volksmarine [People's Navy] (skill 3) decentralized execution, naval artillery, naval training, seamanship, and small taskforce tactics
Luftverteidigung [Air Forces of the National People’s Army] (skill 4) aeronautics, aircraft testing, bomber tactics, fighter tactics, and piloting
Grenztruppen der DDR [Border Troops of the DDR] (skill 3) decentralized execution, electronics, general equipment, infantry focus, and training
Freie Deutsche Jugend [Free German Youth] (skill 2) centralized execution, individual courage, infantry focus, large unit tactics, and training
Volkspolizei [People’s Police] (skill 3) centralized execution, general equipment, individual courage, infantry focus, and training
Kampfgruppen der Arbeiterklasse [Combat Groups of the Working Class] (skill 3) centralized execution, general equipment, infantry focus, small unit tactics, and training
Fallschirmjagerbataillon Willi Sanger (skill 6) decentralized execution, individual courage, infantry focus, small unit tactics, and training
Ministerium fur Staatssicherheit [Stasi- Ministry for State Security] (skill 7) decentralized execution, electronics, management, mathematics, and training
Trabant (skill 3) electronics, industrial engineering, management, and mechanics
Interflug (skill 4) aeronautics, aircraft testing, decentralized execution, and piloting
Handelsorganisation (skill 3) industrial engineering and management
VEB Robotron (skill 3) electronics, management, and mathematics
Greifswald Nuclear Power Plant (skill 5) chemistry, industrial engineering, nuclear engineering, and nuclear physics
Joint Institute of Nuclear Research [East Germany Branch/Members] (skill 4) chemistry, management, mathematics, nuclear engineering, and nuclear physics