Cardiac Catheterization Technicians perform, under a physician's direction, diagnostic tests, both invasive and noninvasive, of the pulmonary system (lung) and the cardiovascular system (heart and circulation). They operate, monitor, and collect data from instruments used in procedures such as cardiac catheterization, angiography, valvuloplasty, angioplasty, electrophysiology studies, cardiac pacing, or cardiac pacemaker or leadwire insertion. Basic Requirements: United States Citizenship: Non-citizens may only be appointed when it is not possible to recruit qualified citizens in accordance with VA Policy. Education. There are no specific educational requirements for this occupation. Education may be substituted for experience only at the GS-4 and GS-5 levels. See the grade requirements pa