Job Description and Duties At Range A, the candidate, under close supervision, performs a variety of the less difficult and responsible professional scientific office and field work. Work at this level is characterized by a reliance on detailed instructions and assistance from lead persons and supervisors in the application of proven techniques and methodologies to assigned work. At Range B, the candidate, under general supervision, performs a variety of responsible professional scientific office and field work. Work at this level is characterized by a reliance on proven techniques and methodologies. At Range C, the candidate, under direction, independently performs a variety of responsible professional scientific office and field work. Work