Jan Czekajewski (born 1934) is a Polish-American engineer and owner/president of Columbus Instruments.

He obtained his master's degree in Electronic Instrumentation from Wroclaw Technical University, Poland.

During 1960-1968, he worked at the Institute of Physics Uppsala University, Sweden, where he got his Ph.D.[1] On March 3, 1968[2] he emigrated to the United States where he started his own company, Columbus Instruments, producing bio-medical and ecological equipment based on his own inventions.

Columbus Instruments[3] sells research equipment to 50 countries, including Poland.

[1] In 2011, the association Polonia Technica attributed him honorary member title.