Question:
Which employer did Mark Krein work for in May, 1955?

Context:
 Mark Krein works for Samara State Technical University from Jan, 1941 to Jan, 1944. 
 Mark Krein works for Odesa University from Jan, 1929 to Jan, 1941. 
 Mark Krein works for Odessa National Maritime Academy from Jan, 1944 to Jan, 1954. 
 Mark Krein works for National Academy of Sciences of Ukraine from Jan, 1944 to Jan, 1952. 
 Mark Krein works for Kryvyi Rih National University from Jan, 1952 to Jan, 1954. 
 Mark Krein works for Odessa State Academy of Civil Engineering and Architecture from Jan, 1954 to Jan, 1976.

Answer:
Odessa State Academy of Civil Engineering and Architecture