SEIS is a space environment information system prototype providing space weather monitoring and analysis services to support mission control operations. It aims to increase awareness of space weather events and their impacts on spacecraft. Preliminary results from INTEGRAL mission users show the system is useful for monitoring conditions in real-time, issuing weekly radiation reports, and analyzing effects of solar storms on the spacecraft. Future improvements include additional forecasting tools, upgraded space environment models, and expanding the user base to more missions and research groups.