The ISTAR Team

The Team is built from an international pool of individuals who bring their immense experience.

Steven Peterzén

CEO and President of ISTAR.  Steven has over 27 years experience in stratospheric ballooning. Steven has made the effort to maintain certifications in outdoor survival education so the field operations remain as safe as possible. Steven's certifications include; Wilderness First Responder, National Outdoor Leadership School Instructor certification, River Rescue, ROV Pilot certified, Diving certifications, Professional Ski Instructors of America, Helicopter long and short line sling load certifications, and fixed wing pilot training. This training regiment keeps the ISTAR team current in the foremost rescue and safety aspects that in the end result in successful recovery operations.


Dr. Silvia Masi

Dr. Silvia Masi has been involved in stratospheric ballooning since the mid 1980's. Her expertise is certainly in the lab as a researcher and scientist  but also has been a team member in nearly every aspect of ballooning operations from all forms of logistics to the inflation, launch, tracking and recovery.