"security firm" in German security firm Sicherheitsdienst Detailed translations for "security firm" security firm security firm(also: security service) der Sicherheitsdienst{masculine} That's right. Now you all know my security firm will be augmenting Senor Espinoza's security force. Source: opensubtitles.org Corpus by OPUS Request review Mein Sicherheitsdienst wird Señor Espinozas Schutz verstärken.