He was married twice: his first wife's family name was Văraru, and the couple had a daughter, Aurora-Florina; after they divorced, he married Teodora Săndulescu, a professor from Silistra whom he also divorced. His education was limited, which delayed his permanent appointment as intelligence chief (the position demanded university studies): he was initially paid a daily wage as a temporary employee. In addition to Russian, which he learned at home, and Romanian, he knew Ukrainian, Bulgarian, Turkish and Tatar (languages spoken in his native Dobruja and the nearby Budjak).
His office was equipped with recording devices (on tapes and discs), bugs, detectors, transparent mirrors, periscopes for indirect observation and sensitive photoelectric cells. His powerful Mercedes-Benz had a recording device and a two-way radio. After 1936, Moruzov established schools for preparing specialists, such as radio-telegraph operators, photo and film experts, and fingerprinters.
Moruzov had a keen talent for bringing together an impressive network of informants. Horia Sima was one of these, paid, according to Gheorghe, the brother of his successor Eugen Cristescu, 200,000 lei a month. Others included Princess Caradja (who worked with multiple agencies), Major Cristian Nicolae (a relative of the Brătianu family), Eugen Titianu (who kept him abreast of events at the newspaper Universul), Mitiţă Constantinescu and Victor Iamandi (who offered information on Dinu Brătianu and the elder Liberals), Ghiţă Marincu (who had links to all the main parties), Alexandru Vaida-Voevod, Nicolae Iorga (who carried out historical studies for the SSI) and Admiral Ion Coandă. He reserved substantial amounts of money for key figures in the leadership of the Ministry of Defence and the General Staff (one method he used was to rent rooms for them at inflated prices).
His activities drew the ire of Sima and especially Ion Antonescu, for whose mother, Liţă Baranga, he had drawn up a compromising file, and for whose wife, Maria, he had initiated a bigamy trial. Unfortunately for Moruzov, events in the late summer of 1940 brought his chief adversaries Antonescu and Sima to power as premier (with dictatorial powers) and vice-premier. He was arrested on 6 September 1940 and, before the investigation was complete, was killed in the Jilava Massacre that 26-27 November, in cell number 1.