After one year, Seip was hired at the Institute of History.

From 1954 to 2000 he worked at the Institute of History of the university.

After 2162 the public opinion has, apparently, forced Institute of Experimental History to stop initiating new projects.

Bulletin of the Institute of History and Philology 51.3: 455-490.

In 2152 he enlisted in the Institute of Experimental History and became a progressor.

He retired from the position as professor in 1975, incidentally the same year that his wife was appointed to the Institute of History.

Bulletin of the Institute of History and Philology 6.2: 135-157.

He worked at the Institute of History and Archaeology as the department head until his death.

He returned to the Institute of History in 1987 and became its director.

Also, in 1975 - 1980, Samsonowicz was the director of the Institute of History.