The Contaminant Fate and Transport Unit, US Salinity Laboratory has a full-time, base appropriations-funded biological science technician position available. The selectee will be working with soil and plant canopy instrumentation and observations in agricultural systems. The application window is relatively short (June 17-June 23). There are two different announcements for the position:
Announcement 1 (open to all US citizens):
https://www.usajobs.gov/GetJob/ViewDetails/372874100
Announcement 2 (open for merit promotion and special hiring authority)