The Industrial Radiography Mobile Source Transit Security (IR-MSTS) Software and Firmware Applications and Components described here are part of a system developed under NNSA funding to track mobile radioactive sources used in the industrial radiography service industry. The individual software applications and libraries, and firmware executables work together and in conjunction with the electronic hardware components to provide situational awareness of the radioactive sources as they are transported from the home base of operations to a job site and back again. Industrial radiography devices are equipped with IR-MSTS components to provide near real time source location information. A Global Positioning System (GPS) is used to track the geographic location of the transport vehicle. Various sensors are used to detect and report tamper of the IR-MSTS components. . Base Station application software, IR Dashboard, allows qualified personnel to track alarms, device information and locations and provides contact info of individuals that need to be notified should anomalous conditions be detected.