Senior System Administrator

Senior System AdministratorColorado Springs, CO Active TS/SCI $135,000 - $160,000Company Overview: Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation's toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don't look any further than Cornerstone Defense.Job Responsibilities:Support a mixed Windows/Linux environment on VMware vSphere and OpenStack.Handle patching, monitoring, incidents, and change control with solid documentation.Work well with the security team on hardening and remediation.Comfortable with segmented networks/least-privilege designs and multi-site operations.10+ years of experience across a broad range of Windows/Linux/Virtualization technologies in professional rolesRequired Skills:Active Directory user/group management, understanding of Group PolicyManaging DHCP and DNS on either Windows or LinuxSTIG hardening concepts for servers, desktops, and network devicesManagement of system updates/patches for Windows and/or LinuxHands-on experience with virtualization; Linux KVM/OpenStack and/or vSphereExperience with troubleshooting complex technical issues across multiple layersUnderstanding of networking; including TCP/IP, VLANs, VPNs, firewall policies, basic routingDesired Skills:Experience managing OpenStack; including overcloud and undercloud updates and tenant managementSAN/NAS operations/concepts; iSCSI, NFS, SMB, snapshots, replicationContainer creation/maintenance; utilizing Docker and/or PodmanKubernetes operations; ability to troubleshoot issues in a clusterScripting and automation experience with Ansible, Bash, PowerShell, and/or PythonFamiliarity with Cisco/Juniper CLIs and configurationsExperience managing Microsoft ExchangeExperience managing Microsoft Endpoint Configuration ManagerCompany Benefits: Cornerstone Defense offers a comprehensive list of benefits, designed to give employees and their families several options to choose from when selecting benefits that best fit their needs. These offerings include not only a full suite of the traditional Medical/Dental/Vision insurances, but also a number of other benefits and perks to include, but not limited to: A 401(K) plan with a company match, tuition and training assistances, paid vacation/leave, a fitness reimbursement program, college savings plan, commuter benefits, financial advisory services, flex spending accounts, health savings accounts, STD/LTD coverage, life and AD&D insurance, employee assistance programs, life financial planning assistance, and legal resources.