covert intelligence work
агентурна робота (про розвідку / термін спецслужб)
work hygiene / hygiene of work
covert intelligence officer identities
be responsible for the results of intelligence work
work for the intelligence agency
work in the mail room of Germany's Federal Intelligence Service
Secret Intelligence Service (SIS) / Military Intelligence, Section 6 (MI6)
tactical intelligence / combat intelligence
undeclared member of the intelligence or counter-intelligence agencies
Defence intelligence of Ukraine (DIU) / Main Directorate of Intelligence of the MoD of Ukraine