[2] Upon taking office in 1945, Frick was faced with the challenge of dealing with the members of the First Russian National Army that had taken refuge in the country a few months prior.

[8] Frick also played a major role in expanding Liechtenstein's foreign policy and affairs.

[2][10] In 1949, he oversaw Liechtenstein ceding the Ellhorn mountain to Switzerland as a result of Swiss demands and threats to, among other things, cease end the customs union between the two countries.

Despite the local community in Balzers previously refusing to do so in November 1948, the transfer was approved by the Landtag of Liechtenstein the following month.

In exchange to the transfer, Switzerland agreed to forgive much of Liechtenstein's debt that it had acquired to the country throughout World War II.

[11] Frick advocated for the reconciliation of relations between Liechtenstein's political parties and pro-German elements during World War II, including the social re-integration of former members of the VBDL.

[2] Both times, however, Frick succeeded in remaining as Prime Minister and maintaining the coalition government between the two parties.

[2] Frick resigned on 16 July 1962 reportedly for health reasons, after serving the premiership for nearly seventeen years.

[2] His son Hansjörg Frick served as a government councillor from 2001 to 2005 in the first Otmar Hasler cabinet.