Full-Time

Cybersecurity Systems Administrator

Posted on 9/11/2026

Deadline 9/11/27
PeopleTec

PeopleTec

501-1,000 employees

Defense contractor: engineering, cybersecurity, program support.

Compensation Overview

$110k - $130k/yr

No H1B Sponsorship

Colorado Springs, CO, USA

In Person

On-site support is required at Peterson Air Force Base.

US Top Secret Clearance Required

Bachelor's

Category
IT Operations (1)
Required Skills
TCP/IP
Incident Response
LDAP
Microsoft Windows
Computer Networking
Cybersecurity
Vulnerability Analysis

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Requirements
  • 8-12+ years of relevant experience in systems administration, cybersecurity, enterprise information technology, network administration, or related technical disciplines.
  • Demonstrated hands-on experience administering enterprise information systems.
  • Experience administering and securing Microsoft Windows Server and Windows enterprise environments.
  • Experience with Active Directory, Group Policy, account administration, permissions, authentication, and access-control technologies.
  • Experience implementing cybersecurity hardening, system security configurations, operating system patches, and application updates.
  • Experience applying and maintaining DISA Security Technical Implementation Guide requirements or comparable system-hardening standards.
  • Experience identifying, tracking, remediating, and validating system vulnerabilities.
  • Experience supporting enterprise vulnerability-management and patch-management processes.
  • Working knowledge of Department of Defense cybersecurity requirements and information assurance practices.
  • Experience with system configuration management, configuration baselines, and formal change-control processes.
  • Working knowledge of TCP/IP, enterprise networking, DNS, DHCP, network services, and common enterprise protocols.
  • Experience reviewing system logs and technical data to identify and troubleshoot system and cybersecurity issues.
  • Experience troubleshooting enterprise operating systems, applications, authentication, network connectivity, and security-related problems.
  • Experience developing and maintaining system documentation, procedures, configuration records, and cybersecurity artifacts.
  • Ability to work effectively with cybersecurity engineers, network administrators, system administrators, security personnel, and government customers.
  • Experience supporting Department of Defense, federal government, or other mission-critical enterprise information systems.
  • Ability to obtain and maintain the security clearance required for assigned programs.
  • Bachelor's degree in Cybersecurity, Information Technology, Computer Science, Information Systems, Engineering, or a related technical discipline; additional relevant technical experience may be considered in lieu of a degree.
  • DoD 8140/8570-compliant certification appropriate for assigned system administration and cybersecurity responsibilities.
  • Ability to obtain and maintain a TS/SCI security clearance required for assigned programs.
Responsibilities
  • Administer, configure, maintain, and secure enterprise information systems supporting Department of Defense mission environments.
  • Perform day-to-day system administration of Windows and other enterprise operating systems and services.
  • Install, configure, update, and maintain enterprise applications, servers, endpoints, and supporting infrastructure.
  • Implement system-hardening requirements and maintain compliance with applicable DISA Security Technical Implementation Guides.
  • Perform operating system, application, and security patching in accordance with established cybersecurity and configuration-management processes.
  • Review, analyze, track, and remediate system vulnerabilities and cybersecurity findings.
  • Implement and validate Information Assurance Vulnerability Alerts, Information Assurance Vulnerability Bulletins, and other Department of Defense-directed cybersecurity updates.
  • Support vulnerability scanning, analyze scan results, remediate identified findings, and validate corrective actions.
  • Maintain system configuration baselines and support formal configuration-management and change-control processes.
  • Administer user accounts, permissions, authentication mechanisms, and access controls in accordance with least-privilege and Department of Defense security requirements.
  • Support Active Directory, Group Policy, enterprise identity services, and related authentication and authorization technologies.
  • Monitor system health, security status, logs, performance, capacity, and availability.
  • Investigate and resolve system, application, authentication, network connectivity, and cybersecurity issues.
  • Review system and security logs to identify anomalous activity, system failures, unauthorized changes, and potential cybersecurity incidents.
  • Support cybersecurity incident identification, investigation, containment, remediation, and recovery activities.
  • Support operation and maintenance of classified and unclassified Department of Defense information systems.
  • Support secure movement and handling of information between authorized systems and security domains.
  • Implement and maintain security controls in support of the Risk Management Framework and system authorization requirements.
  • Develop and maintain system documentation, configuration records, standard operating procedures, technical guides, and cybersecurity artifacts.
  • Support system upgrades, technology refreshes, application deployments, and integration of new hardware and software.
  • Coordinate with cybersecurity, network, systems, and security personnel to resolve technical and compliance issues.
  • Support government customers during cybersecurity inspections, assessments, audits, and authorization activities.
  • Provide technical guidance and mentoring to junior system administrators and support personnel as required.

PeopleTec is an employee-owned defense contractor in Huntsville that delivers engineering, cybersecurity, and program support services to the U.S. defense and civilian federal sectors. Its offerings include systems engineering, software development, test and evaluation, mission operations support, logistics, and a modeling/simulation group plus rapid prototyping in systems integration labs. The company operates by integrating engineering analysis, software/hardware development, rigorous testing, and lifecycle management to support defense programs from concept through deployment. It differentiates itself through its employee-owned structure, end-to-end program lifecycle capabilities, and a strong emphasis on modeling/simulation and rapid prototyping within government channels. Its goal is to help warfighters and federal agencies stay ready and effective by providing dependable, technically skilled services across the full spectrum of defense programs.

Company Size

501-1,000

Company Stage

N/A

Total Funding

N/A

Headquarters

Huntsville, Alabama

Founded

2005

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Simplify Jobs

Simplify's Take

What believers are saying

  • MDA obligated $450,000 at award, starting immediate task orders in Huntsville and Fort Belvoir.
  • PeopleTec added a $48 billion DoD IAC MAC seat on January 22, 2025.
  • Updated August 25, 2026, contract vehicles expand selling access across multiple defense agencies.

What critics are saying

  • PeopleTec sued STI on October 31, 2025 for $1.63 million subcontractor breach damages.
  • June 2025 GAO protest litigation exposed scrutiny over PeopleTec's past-performance representations.
  • If MDA or RCCTO recompetes fail, PeopleTec's Huntsville-heavy backlog collapses in 2027.

What makes PeopleTec unique

  • PeopleTec won MDA's $48.1M IDIQ on February 11, 2026 for digital modeling.
  • July 10, 2025 RCCTO SETA prime contract totals $261M across five years.
  • Its 2026 contract vehicles span SeaPort NxG, ENCORE III, SITE III, and AIT 2.0.

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Benefits

Training Programs

Growth & Insights and Company News

Headcount

6 month growth

7%

1 year growth

7%

2 year growth

8%
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