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Sr. System Administrator
Job in
Dayton, Montgomery County, Ohio, 45444, USA
Listed on 2026-06-25
Listing for:
P3S Corporation
Full Time
position Listed on 2026-06-25
Job specializations:
-
IT/Tech
Cybersecurity, Systems Administrator
Job Description & How to Apply Below
Senior Systems Administrator
Location:
Wright-Patterson Air Force Base (WPAFB), Dayton, Ohio Position Type:
Full-Time, On-Site Clearance:
Active Top Secret Clearance required with eligibility for SCI access. SAP eligibility and prior experience supporting Special Access Programs (SAP) highly desired.
Required
Certifications:
(One or more of the following) CISSP, CAP, CISM, CASP+ / SecurityX, Security+, CySA+, RHCSA, RHCE, Must meet DoD 8570/8140 IAM Level II/III or IAT Level II requirements.
Education:
Bachelor’s degree in information technology, Computer Science, Cybersecurity, Engineering, or related field. Preferred:
Master’s degree in related discipline.
Position Overview The Senior Systems Administrator serves as the lead technical administrator responsible for the design, implementation, operation, security, maintenance, and optimization of classified information systems supporting Department of Defense and Air Force mission requirements. The position provides senior-level expertise across Windows, Linux, virtualization, cloud, containerized, and networked environments while ensuring compliance with DoD cybersecurity, Risk Management Framework (RMF), and Information Assurance requirements.
Required Qualifications Active Top Secret clearance with SCI eligibility.
U.S. Citizenship.
Minimum 8–10 years of systems administration experience.
Minimum 3 years supporting SCI and/or SAP environments.
Extensive experience administering Windows and Linux systems.
Experience supporting classified DoD information systems.
Experience implementing RMF and DISA STIG requirements.
Experience with enterprise virtualization technologies.
Experience with automation frameworks and scripting.
Strong troubleshooting and analytical skills.
Desired Experience Air Force or DoD operational environment experience.
SAP administration experience within the past five years.
Open Shift administration.
Dev Sec Ops platform support.
Cloud infrastructure administration.
Acquisition program office support experience.
Experience supporting highly available mission-critical systems.
Experience leading technical teams and mentoring junior personnel.
Primary Responsibilities Systems Administration Design, implement, administer, and maintain Windows Server and Linux operating systems within classified environments.
Manage Active Directory, Group Policy Objects (GPOs), LDAP, Identity Management (IdM), DNS, DHCP, and enterprise authentication services.
Administer enterprise server infrastructure supporting mission-critical applications.
Configure and maintain physical and virtual server environments.
Perform installation, configuration, maintenance, patching, upgrades, and lifecycle management of enterprise systems.
Monitor system health, availability, reliability, and performance.
Perform capacity planning and infrastructure optimization.
Develop and maintain system architecture documentation.
Classified Network Operations Support multiple classified networks operating within SCI and SAP environments.
Maintain system availability, integrity, confidentiality, and compliance.
Implement secure network configurations and system hardening measures.
Troubleshoot complex system, network, application, and interoperability issues.
Support government inspections, assessments, and accreditation activities.
Cybersecurity & Information Assurance Implement and maintain RMF controls.
Execute DISA STIG implementation and sustainment.
Conduct vulnerability assessments and remediation activities.
Analyze and remediate findings from:
ACASNessusHBSSSplunkSCAP Compliance Checker Develop and maintain System Security Plans (SSPs).Support cybersecurity audits and inspections.
Manage certificates, PKI infrastructure, and cryptographic solutions.
Implement and maintain security baselines.
Ensure compliance with:
DoD 8570
DoD 8140
NIST 800-53
RMFAir Force cybersecurity directives
Linux Enterprise Administration Administer Red Hat Enterprise Linux (RHEL), Rocky Linux, CentOS, and Ubuntu systems.
Configure and manage:
SELinuxFApolicydLDAPIdMSSHNFSDNS services
Perform Linux kernel tuning and performance optimization.
Troubleshoot operating system, service, and application issues.
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