THE STEREO (SOLAR TERRESTRIAL RELATIONS OBSERVATORY) IMPACT (IN-SITU MEASUREMENTS OF PARTICLES AND CME TRANSIENTS) INVESTIGATION INCLUDES THE MAGNETIC FIELD SUPRATHERMAL ELECTRON AND SOLAR ENERGETIC PARTICLE (SEP) INSTRUMENTS ON THE STEREO SPACECRAFT. THE MULTI-INSTITUTIONAL IMPACT TEAM HAS A LONG RECORD OF SUPPORTING THE OPERATIONS DATA PROCESSING VALIDATION AND ARCHIVING ROLES ASSOCIATED WITH THIS INVESTIGATION AND THE STEREO MISSION OF WHICH RESEARCH ACCOMPLISHMENTS BASED ON THE STEREO DATA SETS ARE A KEY PART. OVERALL THIS EFFORT IS CONSISTENT WITH THE GOAL OF EXPLOITING THE UNIQUE HELIOPHYSICS RESOURCE THAT STEREO REPRESENTS ESPECIALLY AT A TIME OF CHANGING SOLAR CYCLES AND RELATED HELIOSPHERIC CONDITIONS AND WHEN NEW INSIGHTS ARE CERTAIN TO RESULT FROM COMBINING OBSERVATIONS WITH NEW AND ONGOING HELIOPHYSICS AND SOLAR SYSTEM MISSIONS. THE IMPACT INVESTIGATION IS NOW PART OF THE STEREO MISSION EXTENDED PHASE CURRENTLY SUPPORTED UNDER NASA GRANT NNX15AG09G ON A THREE YEAR RENEWAL CYCLE. HERE WE PROPOSE FOR SUPPORT OF THE REMAINING CORE TEAM TOWARD FULFILLING ITS STEREO PROJECT ROLES WHILE ENGAGING IN IMPACT DATA APPLICATION-ORIENTED COLLABORATIVE AND OPPORTUNISTIC SCIENCE. THIS COMBINATION PROVIDES VISIBILITY TO STEREO DATA PRODUCTS AND SCIENCE THROUGH REGULARLY PRESENTED RESULTS AT WORKSHOPS AND CONFERENCES INCLUDING SHINE AGU AND PERIODIC LWS MEETINGS AND PUBLICATIONS IN REFEREED JOURNALS. TOGETHER THESE ACTIVITIES ENSURE STEREO IMPACT DATA CONTRIBUTIONS THAT ARE SCIENCE-MOTIVATED UP-TO-DATE AND IN-LINE WITH STEREO MISSION AND HELIOPHYSICS DECADAL SURVEY PRIORITIES.