Systems Administrator

Saalex; Maryland; On-site; USD 90,000 - 135,000; Full time

Benefits offered by this job

Health Care Plan (Medical, Dental & Vision)

Retirement Plan (401k, IRA)

Life Insurance (Basic, Voluntary & AD&D)

Paid Time Off (Vacation, Sick & Public Holidays)

Short Term & Long Term Disability

Training & Development

Wellness Resources

Stock Option Plan

Job summary

Greenfield Engineering, a Saalex Company, is seeking a Journeyman Systems Administrator in Patuxent River, MD. This role involves supporting lab infrastructure and ensuring compliance with DoD cybersecurity policies while maintaining secure lab operations.

The ideal candidate will have over 3 years of system administration experience and a CompTIA Security+ certification. Benefits include health care, retirement plans, and training opportunities.

Qualifications

• 3+ years of system administration experience (lab or enterprise environment).
• CompTIA Security+ certification is required.
• Experience with ACAS and vulnerability scanning.
• Experience supporting ATO/accreditation processes.
• Strong problem-solving skills and ability to work independently.

Responsibilities

• Deploy, configure, and maintain Windows/Linux systems.
• Perform ACAS/SCAP scans, apply STIGs, patch vulnerabilities.
• Assist in creating and maintaining ATO accreditation packages.
• Diagnose and resolve hardware, software, and network issues.
• Maintain LAN/WAN connectivity and administer network security controls.

Skills

System administration experience

CompTIA Security+ certification

ACAS and vulnerability scanning

STIG implementation and security patching

Windows administration

Linux administration

Network troubleshooting

Problem-solving skills

Education

BS/BA degree and 3+ years of experience

AA/AS degree and 5+ years of experience

High School diploma and 7+ years of experience

Tools

Docker

Kubernetes

GitLab

Job description

Greenfield Engineering, a Saalex Company is seeking a Journeyman Systems Administrator in Patuxent River, MD to support the Core Avionics Engineering Division (CAED) within NAWCAD.

This role supports the Avionics Engineering Department and Mission Systems Group labs, ensuring secure, reliable operation of lab environments and maintaining Authorization to Operate (ATO) compliance.

Position Type: Full-Time

Salary: $90k-$135k annually (depending on experience)
Work Location: Full-time onsite (see onsite requirements below)

On-site Requirements: This position is not eligible for reoccurring telework, and will require an onsite presence at Patuxent River NAS for greater than or equal to 90% of the work week.

Position Overview

The Systems Administrator will support lab infrastructure, cybersecurity, and system integration efforts across physical and virtual environments. This role plays a key part in maintaining secure lab operations, supporting test environments, and ensuring compliance with DoD cybersecurity policies.

Essential Functions

• Administer & Maintain Systems: Deploy, configure, and maintain Windows/Linux systems, servers, workstations, and virtual environments (VMs/containers), including user access, system updates, and routine maintenance
• Secure & Harden Infrastructure: Perform ACAS/SCAP scans, apply STIGs, patch vulnerabilities, and maintain system security posture in accordance with DoD policies
• Support ATO & Compliance: Assist in creating and maintaining ATO accreditation packages (eMASS), continuous monitoring, and cybersecurity documentation
• Troubleshoot & Support Users : Diagnose and resolve hardware, software, and network issues; provide Tier 1–2 support and guidance to lab users and engineers
• Integrate & Improve Lab Systems: Evaluate, recommend, and integrate new hardware/software solutions into lab and test environments
• Support Network Operations: Maintain LAN/WAN connectivity and administer network security controls
• Ensure Continuity & Documentation: Maintain backups, support disaster recovery efforts, and keep system configurations and procedures documented
• Other duties as assigned or required

Requirements

Required:

• 3+ years of system administration experience (lab or enterprise environment)

• CompTIA Security+ certification (required)

• Experience with:

  • ACAS and vulnerability scanning
  • STIG implementation and security patching
  • Windows and/or Linux administration
  • Network troubleshooting and system monitoring

• Experience supporting ATO/accreditation processes (eMASS preferred)

• Strong problem-solving skills and ability to work independently

Desired:

• Experience in RDT&E or lab environments

• Familiarity with:

  • Containerization (Docker/Kubernetes)
  • DevSecOps practices
  • GitLab

• Experience integrating hardware/software into test bench environments

• Formal OS training (Windows/Linux certifications or coursework)

Education:

BS/BA Degree and 3+years of relevant experience OR AA/AS degree and 5+ years of experience, OR HS and 7+ years of experience.

Security Clearance: Active Top Secret required. Requirements to obtain a clearance include US Citizenship, security investigation, etc.

Benefits

• Health Care Plan (Medical, Dental & Vision)
• Retirement Plan (401k, IRA)
• Life Insurance (Basic, Voluntary & AD&D)
• Paid Time Off (Vacation, Sick & Public Holidays)
• Short Term & Long Term Disability
• Training & Development
• Wellness Resources
• Stock Option Plan