[3] After graduation, Gulley worked in greenhouses and nurseries in Detroit, Rochester, and South Haven for the better part of two decades.

He worked as assistant horticulturist at Michigan State from 1890 to 1893 and then taught at the University of Vermont for one year.

In the summer of 1894, he began his 23 years of service at the University of Connecticut as professor of horticulture.

He was active in promoting Connecticut's fruit growing interests and frequently lectured at gatherings of state farmers.

[4] Gulley passed away suddenly at his son's fruit farm in South Windsor, Connecticut, which he and his wife were visiting.