Complex sentence: During his time as an undergraduate, David Collins worked at the Pennsylvania Railroad and became aware of the need to automatically identify railroad cars, immediately after receiving his master's degree from MIT in 1959, he started work at GTE Sylvania and began addressing the problem.
Split into simpler sentences: During his time as an undergraduate, David Collins worked at the Pennsylvania Railroad and became aware of the need to automatically identify railroad cars. Immediately after receiving his master's degree from MIT in 1959, he started work at GTE Sylvania and began addressing the problem.