Directors/Advisers

SDA Directors


  • Stewart Sanders

    SDA Chairman and Executive Director

    Stewart Sanders is the senior vice president of Customer Service for SES. He has more than 28 years’ experience in the satellite communication industry, having fulfilled various satellite and payload operations roles for British Telecom International, Intelsat, ICO, SES NEW SKIES and currently SES Engineering.


  • Tobias Nassif

    SDA Executive Director

    Tobias Nassif is the vice president of Satellite Operations and Engineering for Intelsat. Before joining Intelsat, he had an extensive career in operations at PanAmSat and as Director of the Naval Satellite Operations Center, where he was responsible for leading the overall operation of the U.S. Navy’s global communication satellite fleet and associated terrestrial facilities.


  • Ruy Pinto

    SDA Executive Director

    Ruy Pinto is the chief technology officer for Inmarsat. He has a background in electronics and data communications, having graduated in Electronics Engineering in 1981, followed by a post-graduate degree in Digital Telecommunications Systems in 1983.


  • Mark Rawlins

    SDA Executive Director

    Mark Rawlins is the head of Payload Engineering and Operations for Eutelsat. In that position, he is responsible for customer support and communications system management for all service commercialized by Eutelsat. Starting with British Telecom, he has experience in payload operations for more than 25 years of which the last 20 have been with Eutelsat. Previously, at British Telecom, he had been involved in terrestrial and satellite television delivery systems.


  • Rick Greenwood

    SDA Standard Member Director

    Rick Greenwood is technical director, Astrium Telecom Services and Paradigm Services Ltd. He joined EADS in Jan. 2003, and is responsible for the teleports and networks infrastructure of the Skynet Satellites constellation. He is also responsible for the future technical strategy for Telecom services and for bringing new space and ground assets into service.

SDA Technical Advisers


  • T.S. KELSO, Ph.D.

    SDC Operations Manager

    Dr. T.S. Kelso serves as technical program manager for AGI’s Center for Space Standards & Innovation (CSSI). He brings nearly 30 years’ experience in space education, research, analysis, acquisition, development, operations and consulting with organizations such as: Air Force Space Command Space Analysis Center (ASAC); NASA’s Near-Earth Object Science Definition Team; Air Force Chief of Staff’s SPACECAST 2020 and Air Force 2025 future studies; and the Air Force Satellite Control Network.


  • Dan Oltrogge

    SDC Program Manager

    Dan Oltrogge serves as senior research astrodynamist for AGI’s CSSI. Before joining CSSI, Oltrogge worked as a lead systems engineer for SkySentry and as senior analyst and CEO of 1Earth Research, LLC, which he co-founded in 2003. Oltrogge has 25 years of experience in satellite collision avoidance, radio frequency interference and small satellite operations.