JL Shepherd & Associates is a provider of instruments for radiation detection instrumentation.The company was formed in 1967 and it principally engages in manufacturing calibration systems, dosimeter irradiation systems and response check equipment for radiation detection instrumentation, self-contained or beam orientation. It also offers nuclear radiation & testing apparatus; laboratory apparatus & furniture; X-ray equipment & tubes Medical x ray film illuminator clips, Medical x ray film stereoscopes.The company also offers special services which include reloading Gammacel 220 Irradiators and decommissioning of sealed sources and devices. It is headquartered in San Fernando, California. Special services include reloading Gammacel 220 Irradiators and decommissioning of sealed sources and devices