SimVentions, Inc. (4.6 on Glassdoor), a mission-focused Defense & Aerospace technology solutions company, seeks a System Administrator for our IT & Cybersecurity team. In this role, you will install, configure, and maintain secure Windows/Linux servers, virtual environments, and networks that support DoD and federal programs. You will harden systems to meet cybersecurity and STIG requirements, manage user accounts, monitoring, and backups, and rapidly troubleshoot issues to keep mission systems available. Join a collaborative, family-like culture where integrity, teamwork, and professional growth drive impactful work supporting national defense.