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B3 ISSO​/Sys Ad

Listing for: Apex Systems
Full Time position Listed on 2026-11-09
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Administrator
Salary/Wage Range or Industry Benchmark: 110000 - 160000 USD Yearly USD 110000.00 160000.00 YEAR

Job Description & How to Apply Below

Position: B3 ISSO / Sys Ad

Job#: 3056845

Job Description:

Candidates must be U.S. citizens able to obtain and/or maintain a Department of Defense security clearance as a condition and continuation of employment.

Information Systems Security Officer / Systems Administrator

Location: Baltimore, Maryland (On-site)

Secret Cleared Special Access Program

Role Overview

We are seeking a versatile technical professional who can administer Windows and Linux systems while also supporting cybersecurity compliance, authorization, and continuous-monitoring requirements for secure information systems. This position involves working within secured environments, utilizing hands-on experience with system administration, Risk Management Framework guidelines, vulnerability management, and security documentation. The selected candidate will collaborate with engineering teams, program leadership, network administrators, and end users to ensure the integrity and compliance of multi-user computing environments.

Key Responsibilities
  • Support the implementation and maintenance of cybersecurity requirements under the Risk Management Framework.
  • Ensure information systems are operated, maintained, configured, and disposed of in accordance with approved System Security Plans, internal security policies, and applicable government requirements.
  • Develop, review, and maintain documentation including System Security Plans, hardware and software inventories, configuration-management records, and Plans of Action and Milestones.
  • Perform recurring security audits and reviews of operating systems, user accounts, access controls, audit logs, network configurations, and security-relevant settings.
  • Conduct vulnerability assessments using enterprise scanning platforms and coordinate remediation or mitigation activities.
  • Apply and assess Security Technical Implementation Guides for Windows, Linux, virtualization, network, and supporting infrastructure.
  • Administer Windows Server and Red Hat Enterprise Linux systems, including Windows domain services, Active Directory, Group Policy, LDAP, user accounts, and access-control lists.
  • Perform system patching, operating-system upgrades, software installations, configuration changes, and vulnerability remediation.
  • Configure and maintain VMware environments, virtual machines, and associated infrastructure.
  • Perform security monitoring, log analysis, and component administration using enterprise-monitoring platforms.
Required Qualifications

Education: Bachelor's degree in Cybersecurity, Computer Science, Information Systems, Information Technology, or a related technical discipline. A combination of additional education and directly related experience will be considered in lieu of a completed degree.

Must be willing and able to obtain a DOD secret clearance prior to supporting program work

Experience: At least 5 years of relevant experience performing systems administration, cybersecurity compliance, or closely related responsibilities within a secure environment. Experience administering Windows Server operating systems, Windows domain architecture, and Red Hat Enterprise Linux is required.

Technical

Skills:

Proficiency with the Risk Management Framework documentation and security controls. Hands-on experience with operating-system patching, system hardening, account administration, configuration management, and vulnerability remediation. Familiarity with virtualization technologies, Active Directory, Group Policy, and enterprise-monitoring tools.

Preferred Qualifications
  • Active DOD Secrete Clearance
  • Previous experience supporting systems within restricted areas and secure facilities.
  • Experience with vulnerability-scanning technologies and enterprise log-analysis platforms.
  • Experience with network administration and technologies, including switching, routing, subnets, and VLANs.
  • Familiarity with public key infrastructure, encryption technologies, multifactor authentication, and privileged-access management.
  • Experience with Power Shell, Bash, Python, or other scripting languages used to automate administrative or security tasks.
  • Operating-system or infrastructure certifications involving Windows, Linux, VMware, or Cisco.
Everforth Apex Benefits Overview:

Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting,…

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