Linux System Administrator

Dobbs Defense Solutions, LLC; Annapolis (MD); On-site; USD 90,000 - 130,000; Full time

Job summary

Dobbs Defense Solutions, LLC seeks a Linux System Administrator to support a DoD lab at Fort Meade. You will install, secure, and maintain RHEL systems, manage YUM repositories, apply DISA STIGs, and run vulnerability scans. The role also involves integrating ACAS/Nessus findings, supporting DNS/IPv6, and coordinating with Windows AD in a mixed environment.

On-site work requiring an Active Secret clearance and the ability to operate on SIPR networks while upholding DoD security requirements.

Qualifications

• 5+ years hands-on Linux administration experience in enterprise environments.
• Experience with RHEL, VMware 6.7, DNS, IPv6, and Windows/AD.
• Active certification such as Security+, CISSP, CISM, or CASP, or equivalent.

Responsibilities

• Install, configure, secure, and troubleshoot RHEL systems.
• Manage YUM servers and internal repositories.
• Apply DISA STIGs, run SCAP scans, and remediate findings.
• Conduct ACAS/Nessus scans and support patching.
• Provide DNS and IPv6 configuration support.
• Perform VMware 6.7 administration.
• Coordinate with Windows AD and domain services.
• Operate systems on SIPR and other classified networks per DoD security requirements.

Skills

Linux admin

RHEL

VMware 6.7

DNS

IPv6

Windows AD

ACAS/Nessus

Security Center

Vuln remediation

Security certs

Tools

VMware

SCAP

Nessus

Job description

Our Mission:At Dobbs Defense, we deliver mission-centric IT, Cyber, and data analytics solutions for our government and commercial clients through the convergence of automation, innovation, training, and education. Delivering high-quality IT, cybersecurity, and data analytics solutions through proven and innovative methods is our vision.

Job Description:Dobbs Defense Solutions is seeking a Linux System Administrator to providetechnicalsupporttotheFortGeorgeG.Meade.TheroleincludesadministeringandsecuringRHELsystems inaclassifiedDoDlab,supportingtestenvironments,andworkingdirectlywithGovernmentpersonneland missioncustomers.

Duties:

• Install, configure, secure, and troubleshoot Red Hat Enterprise Linux (RHEL) systems.
• Manage and maintain YUM servers and internal package repositories.
• Apply DISA STIGs, run SCAP scans, and implement remediations.
• Conduct ACAS/Nessus vulnerability scans and support RHEL patching and compliance.
• Provide limited support for DNS and IPv6 configuration.
• Perform basic administration within VMware 6.7 environments.
• Support cross platform coordination with Windows Server 2016, Active Directory, and domain services.
• Operate systems on SIPR and other classified networks while adhering to all DoD security requirements.

Qualifications:

• 5+ years of hands-on Linux administration experience, specifically with RHEL 93–5 years of VMware 6.7, DNS, IPv6, and Windows/AD experience in enterprise environments
• 3–5 years of ACAS experience, including Security Center and vulnerability remediation
• At least one active certification (e.g., Security+, CISSP, CISM, CASP, or equivalent)

Working Environment:

On Site

Required Clearance:

Active Secret

Our Equal Employment Opportunity Policy:

Dobbs Defense Solutions is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth or breastfeeding), sexual orientation, gender or gender identity (except where gender is a bona fide occupational qualification), gender expression and transgender status, national origin, ancestry, age, disability, military or veteran status, marital or domestic partner status, genetic information, citizenship, low-income status or any other status or characteristic protected by applicable law. We are committed to equal employment opportunity in all decisions related to employment, promotion, wages, benefits, and all other privileges, terms, and conditions of employment.

Salary Range:

Pay range information will be disclosed consistent with applicable state and local pay transparency laws once available. For this position, the anticipated salary range will depend on experience, qualifications, and overall fit for the role.