The seventh Workshop on Signatures of Man-Made Isotope Production (WOSMIP) was held in Sydney, Australia from December 3-7, 2018. The workshop was hosted by the Australian Nuclear Science and Technology Organization (ANTSO) and supported by the Pacific Northwest National Laboratory (PNNL). Its aim was to support radioxenon monitoring by the International Monitoring System (IMS) operated by the Provisional Technical Secretariat (PTS) of the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), and unite experts from the radioisotope production and nuclear explosion monitoring communicates for a 4-day scientific meeting. A total of 91 experts from 19 countries attended and participated in technical discussions relating to the impact of radioisotopes released from civil and industrial sources on nuclear explosion monitoring in support of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). During WOSMIP VII, sessions were held on background sources of man-made isotopes, research to reduce the radioxenon impact on the IMS of CTBT, current and planned Mo production activities, and radioxenon stack measurements. The major outcomes of the workshop are presented in this summary.