of the magnetic sail. Zubrin is fellow at Center for Security Policy. During his professional career, Zubrin was a member of Lockheed Martin's scenario development team charged with developing strategies for space exploration. He was also "a senior engineer with the Martin Marietta Astronautics company, working as one of its leaders in development of advanced concepts for interplanetary missions". During his time at Martin Marietta, he drafted ideas for a potential single-stage-to-orbit spacecraft, and developed the Black Colt. However, he would eventually leave Martin Marietta to co-form Pioneer Rocketplane with Mitchell Burnside Clapp, an aerospace engineer from the US Air Force, due to a perceived lack of interest in reducing launch costs at larger aerospace firms. In his book, Entering Space: Creating a Spacefaring Civilization, Zubrin would write about how both large aerospace firms, and the US Government, would fail to reduce the costs of spaceflight. In 1998, Zubrin founded the Mars Society, and in the following years, was able to attract large amounts of public interest to potential human colonisation on Mars. The work of the Mars Society was successful enough as to encourage the US Government to not cut funding for several Mars rover missions. Pioneer Energy In 2008, Zubrin founded Pioneer Energy, a research and development firm headquartered in Lakewood, Colorado. The company's focus is to develop mobile Enhanced Oil Recovery (EOR) systems that can enable CO2-based EOR for both small and large oil producers in the United States. The company has also developed a number of new processes for manufacturing synthetic fuels. The ethics of terraforming Dr. Zubrin is known as an advocate of a moderately anthropocentric position in the ethics of terraforming. Discussions of the ethics of terraforming often make reference to a series of public debates Zubrin has held with his friend Christopher McKay, who advocates a moderately biocentric position on the ethics of terraforming. For example, a written account of some of these debates is available in On to Mars: Colonizing a New World, as a joint article, "Do indigenous Martian bacteria have precedence over human exploration?" (pp. 177–182) Cultural references An aged Robert Zubrin also appears as a background character in The Martian Race (1999) by Gregory Benford, a science fiction novel depicting early human explorers on Mars in the very near future. Benford, who is also an astrophysicist, is a longtime member of both the board of directors and the steering