Linux Systems Administrator

Linux Systems Administrator
Aurora, CO
Active TS/SCI w/ CI poly
Compensation Range: $115,000 - $135,000

Company 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:

• Provide IT systems administration of RedHat Enterprise Linux environments.
• Understanding and knowledge of Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server replication methods.
• Working as a team member in a fast-paced technological environment. Use troubleshooting techniques to resolve technical problems of a moderate to high scope and complexity to include the integration of hardware and operating systems (OS).
• Understanding of data RAID, data backup uses and technologies. Install and configure software applications requested by end users.
• Work with Cybersecurity professionals to maintain security requirements and provide documentation and training on advanced IT processes and procedures and other tasks as assigned.
• Must be able to develop solutions and documentation to a variety of technical problems.
• Systems are operational 24x7 and occasionally require work effort beyond standard work hours.
• Travel required to other US Domestic locations as business needs dictate up to 5% travel.
• Full time 100% Onsite position.

Required Skills:

• Typically requires bachelor's degree and minimum of 5 years of prior relevant experience or a master's degree and minimum of 3 years of prior relevant experience.
• Must have a current and transferable U.S. government issued TS/SCI CI Poly security clearance prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Must have Linux experience.
• Must have an active DoD 8570 IAT Level 2 certification (or higher) on start date. IAT Level 2 requires one or more of the following Professional Certifications: Security+ CE, CCNA Security, GICSP, GSEC, SSCP, CySA+, CND
• Must have experience administering Red Hat Linux based systems.
• Must have scripting experience.

Preferred Skills:

• Experience with patching, creating/maintaining RPM packages.
  Experience with performance tuning, networking, user management (LDAP), and security hardening.
• Administer, maintain and troubleshoot Atlassian products (Jira, Confluence, BitBucket).
• Experience with Jenkins automation.
• Configuration of Scanning tools Nessus/McAfee.
• Proficiency with Enterprise level administration of common services such as DNS and LDAP.
• Strong analytic and research skills - must be detail oriented.
• Demonstrated ability to work independently and troubleshoot problems with efficiency.
• Requires the ability to effectively interact with external personnel on significant technical matters often requiring coordination between organizations and vendors.