JOB SUMMARY: These positions are located in Yosemite National Park, in the Division of Facilites Division, Utilities Branch. These are Career/Career-Conditional Full-time appointment. MAJOR DUTIES: This announcement covers Utility Systems Repair Operator-Wawona Water and Wastewater Treatment Plant (WAU) Utility Systems Repair Operator-Wastewater Treatment Plant and Water Treatment/Distribution El Portal (EPU) Utility Systems Repair Operator-Yosemite Valley-Water treatment and distribution, sewer collection systems and lift stations Utility Systems Repair Operator-Back Country Utilities (BCU) These positions are Career Seasonal, subject to non-pay from approximately November to March each year. These positions are located in the Utilities Branch, Division of Facilities Management and Engineering, Yosemite National Park. The Park is open to travel year-round and has a visitor load in excess of four million annually. Yosemite has one of the largest and most complex utility operation and infrastructure in the National Park Service, protecting park resources and providing vital and necessary service for park visitors and operations. Facilities include: 22 wastewater treatment facilities, treating 270 million gallons of wastewater annually, 26 water systems, producing 278 million gallons of potable water annually and 5 backcountry compost toilets, removing about 14 tons of composted human waste annually. The occupant may be assigned to work in any facility or location in Yosemite National Park. The Utility System Repairer Operator works under the supervision of a USRO Supervisor (Wastewater/Water Utilities). Responsible for assisting in the efficient repair, maintenance and operation of water and wastewater treatment plants, collection systems including lift stations, distribution systems, reservoirs, and ancillary equipment. At the WG-5 level, the Utility System Repairer Operator Helper will assist journeyman operators in the efficient repair, maintenance and operation of water and wastewater treatment facilities, collection systems including lift stations and distribution systems. The following duties are listed at the WG-08 and WG-10 level for this position: Operate and troubleshoot lift station functions to include pulling and clearing clogged submersible sewage pumps and grinders, use ladder logic diagrams to determine cause and effect of control errors and equipment failure. Operate water production systems to include turbine and centrifugal pumps and assist in the adjustment of Well flow control equipment such as blow-off valves, surge anticipators, as well as perform maintenance on chemical injection feed pumps and chlorine This is an OPEN CONTINUOUS ANNOUNCEMENT and will remain open until April 04, 2025. The initial cut-off date for referral of eligible applications will be October 18th, 2024, with subsequent cut-off dates on the 15th of each month when the categories for each cutoff have been exhausted. Eligible applications received after the first cutoff date will be referred at regular intervals or as additional vacancies occur on an as-needed basis until positions are filled. Some positions are career seasonal. The nature of seasonal work may vary from year to year, which is generally based on budget, workload, and/or weather. A career seasonal work schedule provides for at least 26 weeks (13 pay periods) of full-time work, and as many as 26 weeks (13 pay period) of non-duty/non-pay time per year as determined by management. The non-pay time for these positions may be two weeks to six months after the first year. The first year you may expect to be in pay status from March to end of November and in non-pay status from approximately the end of November to end of February. You will have the option to continue your health coverage while in non-pay status. IMPORTANT: Click the 'Apply for this job' button to view a complete job description.