Overview Own Your Future. Modern Technology Solutions, Inc. (MTSI) is seeking a Systems Administrator - SME in Dayton, OH. As a System Administrator with MTSI, you will support a customer operating out of Wright-Patterson AFB in Dayton, OH. The Senior System Administrator serves as the Program Office's information technology and is responsible for supporting, designing, maintaining, and monitoring internal and external networks as well as implementing and managing all systems, applications, sec