Senior Linux Windows System Administrator Jobs (NOW HIRING)

Job#: 3035496
Job Description:
For immediate repsonse, please send to : Updated WORD resume, desired hourly/salary rate, and best time to speak!
Position: Linux/Windows Systems Administrator
Location: Oxon Hill, MD (National Harbor)
Duration: 3-6 Month Contract to Hire
MUST HAVES:

• Ability to obtain and maintain a DHS Public Trust (Heavy Financial/Criminal Check) | TS/SCI is nice to have
• Master's & 10+ YOE OR Bachelor's & 14+ YOE within Systems Administration
• Strong Experience within both Windows/Linux environments, Active Directory management

Linux/Windows System Administrator - DHS Program
Overview
The Linux/Windows System Administrator supports DHS mission systems by managing, maintaining, and securing enterprise IT infrastructure across Windows and Linux environments, ensuring compliance with NIST RMF, FISMA, and DHS security standards while maintaining system availability, performance, and reliability.
Key Responsibilities

• Install, configure, and maintain Windows and Linux servers, operating systems, and applications
• Monitor system performance, availability, and resource utilization; troubleshoot and resolve issues to minimize downtime
• Manage user accounts, permissions, and access controls (e.g., Active Directory, Linux user management)
• Implement system patching, updates, and security hardening to ensure compliance with federal standards
• Perform backup, recovery, and disaster recovery planning to protect mission-critical data
• Administer virtualization platforms (e.g., VMware, Hyper-V) and support hybrid infrastructure environments
• Monitor logs, detect security risks, and respond to incidents or vulnerabilities
• Support network and infrastructure operations (DNS, DHCP, TCP/IP, storage systems)
• Develop and maintain automation scripts (e.g., Bash, PowerShell, Python) for system administration tasks
• Maintain system documentation, configurations, and standard operating procedures
• Support compliance activities, audits, and RMF requirements to maintain ATO

Qualifications

• Strong experience with Windows Server and Linux distributions (RHEL, CentOS, Ubuntu)
• Experience with Active Directory, virtualization, and enterprise infrastructure management
• Knowledge of NIST RMF, FISMA, and federal cybersecurity compliance requirements
• Experience with system monitoring, patching, and vulnerability remediation
• Proficiency in scripting/automation (Bash, PowerShell, Python)
• Clearance preferred (Secret+ typical; TS/SCI preferred)
• Security+, RHCSA/RHCE, or Microsoft certifications preferred

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.
Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.
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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, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Everforth Apex team member can provide.
Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.
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