[2] In 1998 Androshchuk defended his candidate's thesis on the topic of historical and cultural relations between Middle Dnieper and Scandinavia, which was published as a book in 1999 under the title "Normans and Slavs in Podesenna".

During his stay abroad, he became interested in the history of Scandinavian weapons as a historical source for the study of contacts between the populations of Eastern and Northern Europe during the Viking Age.

In 2004, on the initiative of Fedir Androshchuk, an exhibition of copies of rune stones "Vikings on the Eastern Way"[5] was held on the basis of the National Museum of the History of Ukraine.

During 2014-2017, on the basis of the State Historical Museum of Sweden, he managed scientific projects aimed at studying silver Byzantine coins and their Scandinavian and Russian imitations.

[9] Androshchuk was published in the leading Ukrainian mass media on topics related to current issues of cultural heritage preservation,[10] monument protection,[11] and development of museums.

EAA evaluated his activities during this period as follows: "The efforts joint during the first weeks to protect and evacuate artefacts allowed for the safeguard of dozens of thousands of archaeological materials in danger, only in the National Museum of the History of Ukraine, almost 120.000.

Its team not only rushed to protect archaeological heritage in the first moments of the attack, helping other regional museums to do so, but as soon as it was safer, it has continued to conduct research, to open new exhibitions and to organise outreach activities, while monitoring looting cases".