Northrop Grumman
Sr Principal Systems Administrator
Aurora, CO
May 30, 2025
$124,900 - $187,300 a year
Full Job Description
RELOCATION ASSISTANCE: Relocation assistance may be availableCLEARANCE TYPE: PolygraphTRAVEL: Yes, 25% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work - and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history.The Payload and Ground Systems organization within the Northrop Grumman Space Systems pushes the boundaries of innovation, redefines engineering capabilities, and drives advances in various sciences. Our team is chartered with providing the skills, and innovative technologies to develop, design, produce, and sustain optimized product lines across the sector while providing a decisive advantage to the warfighter. Come be a part of our mission.
Northrop Grumman is seeking a Sr Principal Systems Administrator to join our team at our facility in Aurora, Colorado.
Job responsibilities will include, but not be limited to, the following:

• Perform as a Linux and Windows System Administrator on large government contracts.
• Perform administration on VMware technologies (or related)
• Experience with all aspects of NAS Storage
• Able to support multiple networks.
• Able to communicate effectively at all levels of the organization, with internal or external customers, in written and oral formats.
• Maintain smooth operation of multi-user computer systems, including coordination with network, software, and system engineers, PC desktop technicians, project managers, end users, and customer and IT management.
• Ensure necessary administration tasks are completed, and direct others as necessary.
• Analyze internal or external customer requirements and determine equipment and software requirements for solutions to problems by means of automated systems.
• Recommend and implement system enhancements that will improve the performance and reliability of the system including installing, upgrading/patching, monitoring, problem resolution, and configuration management.
• Provide backup and recovery services; manage file systems and disk space; manage virus protection on a routine basis.
• Create and maintain user and computer accounts and modify file permissions and security access lists.
• Develop and document technical processes and procedures as needed.
• Make recommendations in regard to purchase hardware, software, and system components.
• Interact, meet, discuss, and troubleshoot issues with vendors; evaluate vendor products, services, and suggestions.
• Adhere to strict Information Systems security guidelines in all cases.
• Maintain security audit and logging information on all classified networked and standalone computers as directed by the Information Systems Security Manager (ISSM).
• Support the Cyber Security team.
• Report on project status as required for all recurring and non-recurring efforts.
Basic Qualifications:

• Bachelor's degree with 8 years of IT experience; Master's degree with 6 years of IT experience; Associate degree with 10 years of IT experience; OR a HS Diploma / GED with 12 years of IT experience is required
Candidate must have active/current Top Secret/SCI clearance with adjudicated CI Polygraph at time of application
• Must have server administration experience with Linux (RedHat Enterprise Linux is preferred) and Windows
• Perform administration on VMware technologies (or related)
• Must have a DOD 8570 IAT Level 2 baseline certification (example: Security+ CE); OR must have the ability to obtain one within 6 months of start date.
• Experience with NAS storage device (preferably NetApp) administration (ONTAP 8.x or higher; CDOT)
• Ability to lift equipment weighing up to 40 pounds.
• Ability to support after hours and on weekends as needed
Preferred Qualifications:

• Higher degree in a STEM-related discipline
• Network hardware and configuration
• 10+ years of experience with Red Hat Enterprise Linux (RHEL) server administration in an SCI classified environment
• Experience operating under and managing systems within NISPOM Chapter 8, DCID 6/3-ICD 503, RMF, STIG, JAFAN, or JSIG information system environments
• Solid understanding of Enterprise-level storage concepts to include all commonly used RAID-levels
• Solid understanding of remediating security vulnerabilities; Experience hardening Linux systems in accordance with RMF and STIGs
• Identity Management (Single Sign-On) experience
• VMware and ESXi (6.x or higher) configuration and management experience
• Experience with host-based firewall implementations and configuration (Redhat "iptables")
• Windows 10 administration experience; Windows Server experience; Group Policies (GPOs) experience; Active Directory management experience
• Solid writing skills and use of Wiki pages and Sharepoint sites for documentation
• DoD 8570 Certification in a primary OS (Windows, Linux, Cisco)
• Currently valid Security+ CE, CASP, CISSP, or similar security certification
• Experience in VMWare, NetApp and Splunk among other industry standard technologies.  Comfortable with maintenance and OS upgrades
• Preferred candidate will be familiar with Tenable and Nessus scans for vulnerability and controls implementation.
Salary Range: $124,900.00 - $187,300.00The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions.Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay. Annual bonuses are designed to reward individual contributions as well as allow employees to share in company results. Employees in Vice President or Director positions may be eligible for Long Term Incentives. In addition, Northrop Grumman provides a variety of benefits including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business.The application period for the job is estimated to be 20 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates.Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit http://www.northropgrumman.com/EEO. U.S. Citizenship is required for all positions with a government clearance and certain other restricted positions.PDN-9f082533-0618-4c4e-aa3d-f06e5286b6b8
Job Information
Job Category:
Information Technology
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Sr Principal Systems Administrator
Northrop Grumman
Aurora, CO
May 30, 2025
$124,900 - $187,300 a year
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