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Principal Systems Administrator - LINUX Security Clearance

Job in Linthicum, Anne Arundel County, Maryland, USA
Listing for: ASD, Inc.
Full Time position
Listed on 2026-06-29
Job specializations:
  • IT/Tech
    Systems Administrator, Cybersecurity, Unix/Linux
Job Description & How to Apply Below
Position: PRINCIPAL SYSTEMS ADMINISTRATOR - LINUX with Security Clearance
Principal Systems Administrator to join our dynamic team of technical professionals in Linthicum, MD. Note
- The selected candidate will be required to work on-site, full-time, at our Linthicum, MD campus. This is not a virtual position. Candidates MUST possess a current TS/SCI to include a current and recently adjudicated [within the last 5 years] Polygraph in order to be considered. Roles and responsibilities will include but not be limited to the following:
Perform as primary Linux Systems Administrator for a classified government contract.
Communicate effectively at all levels of the organization, with internal and external customers, in written and verbal format.
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.
Support multiple networks while ensuring necessary administration tasks are completed and directing others as necessary.
Analyze internal and 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, and manage virus protection on a routine basis.
Create and maintain user and computer accounts and modify file permissions and security access lists.
Test new releases of products to ensure compatibility and minimize user impact.
Develop and document technical processes and procedures as needed.
Make recommendations to purchase hardware, software, and system components.
Interact, meet, discuss, and troubleshoot issues with vendors, and 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).
Prepare security documentation for input to Computer Security.
Report project status as required for all recurring and non-recurring efforts.
Work under minimal direction and independently determine and develop approach to solutions.
This position may be filled at either level 3 (Principal level), or level 4 (Sr. Principal level), depending on the skills, education, and experience below. Basic Qualifications (for level
3):
Master's Degree with 3 years of relevant IT experience; OR a Bachelor's Degree with 5 years of relevant IT experience; OR an Associate's Degree with 7 years of relevant IT experience; OR a High School Diploma/GED with 9 years of relevant IT experience is required
Must have a DOD 8570 IAT Level II, or higher, certification (example: Security+ CE); maintaining the required certification will be a condition of continued employment
Must have Linux server Operating Systems support experience
Linux Workstation and Server management experience is required
Experience operating under, and managing systems within, NISPOM Chapter 8, DCID 6/3-ICD 503, RMF, STIG, JAFAN, or JSIG information system environments
Candidates must have a current DOD Top Secret level security clearance, to include SCI access and a recent Polygraph [adjudicated within the last 5 years], in order to be considered
Candidates must have the ability to obtain, and maintain, access to Special Programs as a condition of continued employment
Basic Qualifications (for level
4):
Master's Degree with 6 years of relevant IT experience; OR a Bachelor's Degree with 8 years of relevant IT experience; OR an Associate's Degree with 10 years of relevant IT experience; OR a High School Diploma/GED with 12 years of relevant IT experience is required
Must have a DOD 8570 IAT Level II, or higher, certification (example: Security+ CE); maintaining the required certification will be a condition of continued employment
Must have Linux server Operating Systems support experience
Linux Workstation and Server management experience is required
Experience operating under, and managing systems within, NISPOM Chapter 8, DCID 6/3-ICD 503, RMF, STIG, JAFAN, or JSIG information system environments
Candidates must have a current DOD Top Secret level security clearance, to include SCI access and a recent Polygraph [adjudicated within the last 5 years], in order to be considered
Candidates must have the ability to obtain, and maintain, access to Special Programs as a condition of continued employment

Preferred Qualifications:

The ideal candidate will have a Bachelor's degree in Information Technology, a Security+ CE, a Linux+ or RHCSA, and 9 years of Linux Server Administration experience in a classified environment
Understanding of basic networking, including subnets, routing, and VLANs;
Cisco experience and/or certification
Windows server management…
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