New York, Jan 7 : Levi Johnston, the father of Sarah Palin's 17-year old-daughter's baby, has quit his oil field job after questions arose concerning his eligibility for the post.

According to Anchorage Daily News, the 18-year-old worked in Milne Point oil field with ASRC Energy Services Inc.

Johnston's father confirmed that he has quit his job after questions arose concerning his eligibility.

Employees in the electrical apprenticeship program in which Johnston worked are required to have a high school diploma, which he does not possess.

A local radio host, Dan Fagan, questioned his eligibility in a newspaper column.

"He felt it was the best thing to do to kind of calm the waters, so to speak," the New York Daily News quoted Johnston's father Keith as saying.

Rumours were also rife that Alaska Gov. Sarah Palin helped the father of her grandson Tripp get the job, which she denied.

Keith has also denied that the Sarah helped his teenage son with the job.

"Sarah had nothing to do with him getting hired on the Slope. If there was any help getting him on up there, it was because of my associations and no one else''s," he said. (ANI)