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Greg Land is an experienced Principal Unix Systems Administrator currently working at SGT, overseeing Unix systems for the USGS Earth Resources Observation Systems Data Center since October 2007. Land possesses extensive knowledge in administering various Unix and Linux systems, with a focus on configuration management, security analysis, and maintenance of a large server deployment. Prior experience includes roles as a Computer Scientist/System Administrator at SAIC, where responsibilities included managing a multi-server environment for the USGS Alaska Science Center, and systems administration for the 11th Operational Weather Squadron. Earlier positions involved systems administration and network management at Business Software, Inc. and the US Army, alongside a solid educational background with degrees in Electronics & Management and other technical certifications.