Two International Space Station (ISS) managers are taking on new positions in the program. Michael T. Suffredini has been named ISS deputy program manager at NASA's Johnson Space Center in Houston. Mark S. Geyer will replace Suffredini as mission operations integration manager for the ISS Program. After a transition period, the assignments formally begin in August.

"I am fortunate to have these two experienced managers on the ISS team," said Bill Gerstenmaier, ISS Program Manager. "I look forward to working with them in their new roles and continuing successful operation of the ISS Program and vehicle."

As the ISS Deputy Manager, Suffredini is responsible for the day-to-day management, development, integration and operations of the orbiting research laboratory. Suffredini is replacing Col. Charles J. Precourt, who recently was named the program director of the Crew Exploration Vehicle.

In previous positions at NASA, Suffredini managed ISS Operations Integration, ISS Vehicle Development and the ISS Payloads Office, and served as deputy manager of the ISS Business Management Office. He was instrumental in the startup of on-orbit operations and sustaining engineering in addition to launching the ISS research program. Suffredini joined NASA in January 1989 and holds a bachelor's degree in aerospace engineering from the University of Texas, Austin.

As the new manager of ISS Operations Integration, Geyer will serve as the Chair of the ISS Mission Management Team and will be responsible for coordinating and integrating critical activities associated with the performance of real-time ISS missions.

Before joining NASA in 1990, Geyer worked at the Lockheed Missiles and Space Corp. in Sunnyvale, Calif., as a systems engineer supporting the Lunar and Mars Exploration Office. He joined the ISS Program in 1994, most recently serving as manager of the Program Integration Office. Other assignments included lead of the System Integration and Analysis Office, Increment 0 Manager and manager for the Russian Elements within the ISS Program. Geyer holds a master's degree in engineering from Purdue University, West Lafayette, Ind.