SYSTEM ADMINISTRATOR - Linux/RedHat/Splunk - 15+ yrs of Experience - TS/SCI w/Poly clearance is required - ID - 525

Halogen Engineering Group, Inc; Maryland; On-site; USD 217,000 - 230,000; Full time

Benefits offered by this job

Medical plans

Vision plan

401K Retirement Plan

Life Insurance/AD&D

Paid Time Off

Job summary

Halogen Engineering Group is seeking a seasoned System Administrator with 15+ years of Linux/RedHat/Splunk experience and a current TS/SCI with Poly clearance. The role is onsite at Annapolis Junction, MD, supporting a large-scale Linux environment and ensuring security, reliability and performance.

Responsibilities include installation, monitoring, problem resolution, and collaboration with management. Competitive salary and strong benefits are provided.

Qualifications

• Experience using the Linux CLI is required.
• System administration of large-scale Linux clusters with COTS/GOTS/FOSS software.
• Strong knowledge of compute, network, memory and storage components.
• Experience with Red Hat Satellite management.
• Familiarity with Splunk for data ingestion, indexing, searching, monitoring and analysis.
• Experience with VMware ESXi and virtualization.
• Experience with IaC tools such as SaltStack and Ansible.
• Knowledge of security/compliance policies and procedures.

Responsibilities

• Provide support for implementation, troubleshooting and maintenance of IT systems.
• Offer Tier 1 and Tier 2 problem identification, diagnosis and resolution.
• Manage daily activities of configuration and operation of IT systems.
• Assist users in accessing and using IT systems.
• Monitor and resolve problems across client/server/storage/network devices.
• Communicate status updates to agency management and internal customers.
• Optimize system operations and capacity planning.
• Analyze and resolve complex server hardware/software integration issues.

Skills

Linux CLI

Large-scale Linux cluster

Red Hat Satellite

Splunk

VMware ESXi

Infrastructure as Code

SaltStack

Ansible

Security compliance

Docker

Education

Bachelor's degree in a technical discipline

Five years additional SysAdmin experience may substitute for degree

Tools

SaltStack

Ansible

Jira/Confluence

Red Hat Satellite

VMware ESXi

Docker

Kubernetes

Job description

SYSTEM ADMINISTRATOR - Linux/RedHat/Splunk - 15+ yrs of Experience - TS/SCI w/Poly clearance is required - ID - 525

Posted On 11/02/2026

Job Information

Technology

Work Experience 10-15 Years

217K-230K

City Annapolis Junction

State/Province Maryland

20701

Job Description

System Administrator - Linux/RedHat/Splunk -15+ yrs of Experience - TS/SCI w/Poly Required

Halogen Engineering Group is looking for a System Administrator wh o will be responsible for providing support for a large-scale Linux system including installation of COTS/GOTS/FOSS software, day-to-day operations, monitoring, and problem resolution for all the compute, network, memory, and storage system components. In addition, the System Administrator shall maintain the system security integrity and configure network components, along with implementing operating systems enhancements to improve reliability and performance.

Location: Annapolis Junction, MD

Travel Required: No

Shift: Day

Remote Type: Onsite

Call in Support: Yes

Security Clearance: Current TS/SCI

Polygraph: Required

Salary Range

The projected compensation range for this position is 217K to 230K (annualized USD).

Salaryis determined by various factors, including but not limited to location, the individual’s particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements

Capabilities

• Provide support for implementation, troubleshooting and maintenance of IT systems
• Provide Tier 1 (Help Desk) problem identification, diagnosis and resolution of problems
• Manage the daily activities of configuration and operation of IT systems
• Provide assistance to users in accessing and using IT systems
• Provide Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis and resolution of problems
• Provide support to IT systems including day-to-day operations, monitoring and problem resolution for all of the client/server/storage/network devices, mobile devices, etc.
• Provide support for the escalation and communication of status to agency management and internal customers
• Optimize system operations and resource utilization, and perform system capacity analysis and planning
• Provide in-depth experience in trouble-shooting IT systems
• Provide detailed analysis and feedback to agency management and internal customers for escalated tickets
• Provide support for the dispatch system and hardware problems and remains involved in the resolution process
• Configure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance
• Support the design of systems, mission architecture and associated hardware
• Possess a working knowledge and understanding of system administration interdependencies as part of the Service Oriented Architecture (SOA)
• Analyze and resolve complex problems associated with server hardware, applications and software integration

Requirements

Required Skills

• Experience using the Linux CLI
• Experience in performing System Administration including installation, configuration, and support of COTS/GOTS/FOSS software in a large-scale Linux cluster environment
• General technical knowledge regarding compute, network, memory, and storage system components
• Experience with Red Hat Satellite systems management solution
• Familiarity using Splunk for ingesting, indexing, searching, monitoring, and analyzing big data
• Experience with the sustainment and support of large Linux clusters including day-to-day operations, monitoring and problem resolution
• Experience configuring and sustaining VMware ESXi/Virtualization environments
• Experience with IaC (Infrastructure as Code) principles and automation tools such as SaltStack and Ansible
• Experience with corporate STE/STN security compliance policies and procedures
• Experience using system monitoring tools such as HPE One View and Nagios
• Experience with containerization technologies such as Docker
• Certifications - Security +

Desired Skills

• Experience with container orchestration technologies such as Kubernetes
• Experience with the Atlassian Suite of Tools such as Jira and Confluence

Qualifications

• Fifteen (15) years experience as a Systems Administrator in programs and contracts of similar scope, type, and complexity is required.
• Bachelors degree in a technical discipline from an accredited college or university is required.
• Five (5) years of additional Systems Administration experience may be substituted for a bachelors degree.

CareFirst Insurance

Medical Plans

• Three available medical plans–2 Platinum PPO Plans ($0 Deductible) and 1 HSA Plan ($1500 deductible)
• Halogen pays 100% Medical Premium Costs up to $25,000
• CareFirst Wellness Rewards Program
• Halogen pays 50% of the plan costs

Vision Plan

• Halogen pays 100% of the plan costs

401K Retirement Plan

10% contribution paid by the company, automatically vested and paid in each pay period.

Life Insurance, AD&D, Short and Long Term Disability Coverage

Paid Time Off

Based on performance and billable hours

Halogen Engineering Group does not discriminate in employment on the basis of race, color, religion, sex (including pregnancy and gender identity), national origin, political affiliation, sexual orientation, marital status, disability, genetic information, age, membership in an employee organization, retaliation, parental status, military service, or other non-merit factor.