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Abstract. This paper reviews recent and current efforts to implement Model-Based Systems Engineering at the Canadian Space Agency. A mission under concept development is being used both for demonstration purposes and also for real process design with SysML. Several support and bridge tools have been developed to help with key process issues. A number of technology issues have come out of our work, leading to a wish list of improvements we would like to see. Also, we have been dealing with organizational resistance that is preventing a wider acceptance of MBSE.