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Senior Linux & Windows Administrator

Aurora, CO
All Qualified Resumes Responded to in 24 Hrs or Less
Active TS/SCI/w Poly and DODI 8570.1-M IAT Level I Certification Required 


Duties and responsibilities include:
  • Support project design reviews, cost trade-off analyses, team meetings, program and customer meetings as needed.
  • Develop and deliver configuration and deployment automation required for improving the functionality, availability, and manageability of platform and associated service.
  • Perform software application maintenance and OS maintenance on a diverse network of physical and virtual servers.
    • Operating systems to include Windows Server, Red Hat Linux/CentOS, and VMWare.
  • Perform routine and preventative maintenance such as general computer tasks, application loads, storage management, system loading and system monitoring
  • Detect, isolate, document, quickly report, and resolve system outages or problems utilizing program processes and procedures.
    • These activities include collecting diagnostic data, restoring the system operation, developing workarounds, and other activities necessary for recovery of a system
  • Document problems in logging and discrepancy reporting tools per customer requirements.
  • Perform system monitoring, analyzing and documenting of performance and conducting trend analysis as required.
  • Implement and maintain compliance of Information Security and Assurance policies
  • Apply security hardening settings and work with our Information Assurance partners to maintain compliance with standards
  • Administer backups and diagnose backup errors
  • Partner with application/project/security teams and vendors to plan, design, and implement new IT infrastructure
  • Create and maintain technical and detailed design documentation
Required Skills:
Candidate shall have a minimum of six (6) years of experience to include: 
  • Performing Linux systems administration with Red Hat Enterprise Linux/CentOS or SuSE Linux Enterprise 
  • System maintenance activities such as user administration, system network management, patching, name resolution, authentication, daemon, init, and cron management
  • System backup and restore with tools such as NetVault, Backup Exec, and Clonezilla 
  • Experience with system deployment and configuration management tools such as Kickstart, Altiris, and Puppet 
  • Experience with VMware Virtual Center Server and vSphere
  • Linux integration with Windows-based systems
  • System design, installation and configuration
  • System security controls implementation
  • Vulnerability Assessment (testing, assessment, mitigation/justification) 
  • Experience with compliance and implementation of Information Security and Assurance policies (i.e., ICD-503)
  • Troubleshoot issues using built-in operating system functionality and system logs
  • Documentation including discrepancy reports, system configuration, test documentation, and user guides
  • Demonstrated experience creating, implementing, and maintaining scripts for process automation, infrastructure monitoring, and proactive reporting
  • Demonstrated experience in all aspects of managing a Unix/Linux environment including the use of configuration management tools like Puppet and Chef for centralized management and configuration of systems to enforce security controls 
  • Must be able to provide occasional off hour call in support
Desired Skills:
  • Experience in a DevOps role and environment
  • Experience managing modern Windows systems and Active Directory
  • Software release management and tools such as Subversion and Vagrant 
  • Virtualization such as Vsphere and KVM
  • Familiarity with Host-Based Security System (HBSS) suite of software applications (McAfee) 
  • Network monitoring systems such as What’s Up Gold and Nagios 
  • Object Request Brokers such as CORBA and RPC
  • Public Key Infrastructure
  • Experience and technical knowledge of satellite ground systems including hardware, software, and network architecture
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