Question:
Which employer did Gijs Bakker work for in Jun, 1964?

Context:
 Gijs Bakker works for Delft University of Technology from Jan, 1985 to Jan, 1987. 
 Gijs Bakker works for Design Academy Eindhoven from Jan, 1987 to Jan, 2003. 
 Gijs Bakker works for Koninklijke Van Kempen & Begeer from Jan, 1963 to Jan, 1965.

Answer:
Koninklijke Van Kempen & Begeer