Frank Groen, director of the Office of Safety and Mission Assurance’s (OSMA) Safety and Assurance Requirements Division at NASA Headquarters, is focusing his division on getting the agency's SMA capabilities ready for NASA's future missions.

Nick Johnson retired March 28, 2014, saying goodbye to NASA after 18 years as NASA's chief scientist of Orbital Debris (OD) and 10 as the OD Program Office's program manager.