Culliton began his television career in the early 1980s writing for NBC Daytime's Texas, and then serving as Co-Head Writer for CBS Daytime's Guiding Light from 1983 - 1984.
After this, he served as Head Writer of Another World from 1984 - 1985. The characters of Marley Hudson and Wallingford were created during his tenure. He wrote for Search for Tomorrow under Addie Walsh in 1986. In the late 1980s, Culliton returned to the writing staff of Guiding Light. He was part of the team that won a Daytime Emmy Award in 1990.