System Administrator – Classified Environments

SierTeK Ltd.; Dayton (OH); On-site; USD 70,500 - 122,200; Full time

Job summary

Leidos seeks a System Administrator for its Corporate Information Security Office in Beavercreek, OH, to maintain and secure complex classified information systems in line with DoD and RMF requirements.

You will install Windows and Red Hat systems, manage AD and DNS, and support time-sensitive infrastructure projects under the guidance of a senior ISSE, with eligibility for SAP and Top Secret clearances.

Qualifications

• Minimum a bachelor's degree with 2–4 years of relevant experience.
• Active DoD Secret clearance with SAP eligibility; Top Secret eligibility.
• DoD 8570 IAT Level II or higher (Security+ or equivalent).
• Experience managing Windows domains, AD, DNS.
• Basic Linux knowledge and willingness to complete RHCSA.
• Familiarity with RMF and vulnerability reports.

Responsibilities

• Maintain, secure, and support classified information systems.
• Ensure compliance with security protocols and regulations.
• Install, configure, and sustain Windows and Red Hat systems.
• Coordinate with senior ISSE and contractors.
• Prepare vulnerability scans and artifacts.

Skills

Windows administration

Active Directory

DNS

RMF

Security+ / DoD 8570 IAT II

Linux basics

Scripting

Vulnerability management

Education

Bachelor's degree or equivalent experience

Job description

Leidos seeks a System Administrator for its Corporate Information Security Office in Beavercreek, OH, to maintain and secure complex classified information systems in line with DoD and RMF requirements.

You will install Windows and Red Hat systems, manage AD and DNS, and support time-sensitive infrastructure projects under the guidance of a senior ISSE, with eligibility for SAP and Top Secret clearances.