He was the curator of the Arnold Arboretum and the Gray Herbarium at Harvard University from 1954 until his death in 1963.
He went on to study for his doctorate at the Missouri Botanical Gardens under the tutelage of professor Jesse More Greenman.
Kobuski was first hired by Harvard University in 1927 as an editor of the Journal of the Arnold Arboretum.
[4] On October 9, 1942, he enlisted in the US Army[5] serving until early 1946, taking a leave of absence from Harvard during this time.
[6] In 1954 Kobuski, or "K" as he was known,[2] was hired to be the head curator of both the Arnold Arboretum and Gray Herbarium.