Senior Systems Administrator – Top Secret
Apogee Research, LLC
full-time
Posted on:
Location Type: Office
Location: Arlington • Virginia • United States
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Job Level
About the role
- Configure, maintain, and administer a blended Linux/Windows infrastructure environment
- System deployment (Hardware assembly, OS installation and configuration, permissions configuration, and security hardening)
- System maintenance (User management, installation, configuration, and update of software, patches, and firmware)
- System optimization (Monitor system performance and health to identify opportunities for performance improvement, implement system tuning)
- Automation (Scripting routine tasks using BASH, Python, and PowerShell)
- Linux systems administration including identifying and troubleshooting issues with permissions and user rights, networking, performance and responsiveness, and system functionality problems resulting from security hardening
- Provide support and administration of security and management systems (switches, firewalls, domain controllers, virtualization stack) in accordance with expertise
- In-person, voice, and chat support to users for laptop configuration, network settings, hardware peripherals, and standard end user applications
- Configure, manage, and maintain auditing tools used in the classified spaces (Kibana or Splunk experience preferred)
- Perform system backups, Assured File Transfers, and secure decommissioning of hardware in compliance with DoD policies
- Implement and verify Security Technical Implementation Guides (STIGs) and security controls per NIST SP 800-53 for classified networks (WAN, ISOL, LAN)
- Support vulnerability scanning and remediation using approved tools (i.e., Nessus)
- Deploy and maintain log aggregators (i.e., Kibana)
- Coordinate and collaborate with the ISSO, ISSM, Contract Program Security Officer (CPSO)/Facility Security Officer (FSO), and IT teams to implement and enforce system security controls through incident reporting and investigation, system and process documentation, and establishment and maintenance of configuration management baselines
- Participate in recurring assessment activities (Incident Management Drills, Security Configuration Board Meetings, Change Control Board meetings)
- Support cyber awareness training by providing technical input on system usage and security best practices
Requirements
- 5+ years of experience as a Systems Administrator or IT specialist
- Full-Time, In-Person hands-on system administration experience, including command line/shell activity, with Red Hat, other Linux distributions, Windows Server (2019/2025), and Windows 10/11 in enterprise or DoD environments
- Expertise troubleshooting services and protocols such as TCP/IP, DNS, FTP, SSH, SCP, SSL, HTTP/HTTPS
- Ability to obtain and maintain one or more certifications (CGRC, CND, CompTIA Security+, CompTIA CYSA+, SecurityX / CASP+, CCNP Security, CCSP, Cloud+, FITSP-O, GFACT, GICSP, GSEC, Network+, and SSCP).
- Self-starter, highly motivated, able to multi-task and meet tight deadlines.
- Excellent communication skills (oral and written), ability to work in a team environment, and must work well with others.
- Effective problem-solving skills
Benefits
- Health, dental, vision, life, and disability insurance
- FSAs
- Paid vacation
- Sick leave
- Paid holidays
- Paid garage parking or contribution towards a transit account
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills & Tools
Linux administrationWindows ServerBASH scriptingPython scriptingPowerShell scriptingsystem deploymentsystem maintenancesystem optimizationvulnerability scanningsecurity hardening
Soft Skills
communication skillsproblem-solving skillsteamworkself-startermulti-taskingmotivationtime management
Certifications
CGRCCNDCompTIA Security+CompTIA CYSA+SecurityX / CASP+CCNP SecurityCCSPCloud+FITSP-OGSEC