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Full-time
bachelor degree, postgraduate degree
Posted 5d ago
Apply by Aug 6
~40 hrs/week
Responsibilities
The Senior Systems Administrator will lead the design, management, and optimization of Windows-based systems and AWS cloud infrastructure. Responsibilities include performing system installations, patching, monitoring, troubleshooting, and ensuring compliance with DoD and security requirements.
Requirements
Candidates must possess a Bachelor's degree with 8+ years of experience or a Master's with 6+ years, along with an active TS/SCI clearance. Required certifications include Security+ CE or higher, and strong expertise in Windows Server, VMware, and scripting is essential.
Full job description
Summary
Sr. Systems Administrator
St. Louis, MO
Are you ready to enhance your skills and build your career in a rapidly evolving business climate? Are you looking for a career where professional development is embedded in your employer’s core culture? If so, Chenega Military, Intelligence & Operations Support (MIOS) could be the place for you! Join our team of professionals who support large-scale government operations by leveraging cutting-edge technology and take your career to the next level!
Chenega Agile Real-Time Solutions (CARS) was created with the purpose of providing integrated enterprise IT support to Federal customers both CONUS and OCONUS. CARS employs Subject Matter Experts (SMEs) with decades of experience working in the Federal marketplace.
We are seeking an experienced Senior Systems Administrator to lead the design, management, and optimization of our Windows-based systems and AWS cloud infrastructure. The ideal candidate will have deep expertise in Windows environments, cloud technologies, and cybersecurity, with a proven ability to architect and support secure, scalable enterprise systems. This role provides an opportunity to work with cutting-edge technologies, contributing to the high availability, performance, and security of our IT operations.
Responsibilities
Administer, maintain, and support the application with the customer enterprise.
Perform installation, configuration, patching, upgrades, and lifecycle management of Windows and Linux servers.
Monitor system health, performance, and availability using enterprise monitoring tools.
Troubleshoot complex hardware, software, operating system, and application issues.
Support deployment activities across development, test, staging, and production environments.
Coordinate scheduled maintenance windows and execute system upgrades with minimal operational impact.
Develop and maintain automation scripts using PowerShell, Bash, or Python to improve operational efficiency.
Perform backup, recovery, and disaster recovery operations.
Support accreditation activities and ensure compliance with customer, DoD, RMF, DISA STIG, and security requirements.
Manage user accounts, permissions, and Active Directory integrations.
Collaborate with security teams to remediate vulnerabilities and maintain compliance.
Support incident response, root cause analysis, and corrective action implementation.
Document system configurations, standard operating procedures, and technical documentation.
Participate in on-call rotation and provide after-hour support when required.
Interface directly with customers to address operational tasking and mission requirements.
Other duties as assigned.
Qualifications
Bachelor’s degree in information technology, Computer Science, Engineering, OR related field, and 8+ years of prior relevant experience OR
Master’s with 6+ years of prior relevant experience.
8+ years of enterprise systems administration experience.
Experience supporting mission-critical DoD or Intelligence Community environments.
Strong administration experience with:
Microsoft Windows Server
VMware vSphere
DNS/DHCP
Group Policy
Experience with scripting and automation using PowerShell, Bash, or Python.
Must have a Security+ CE or higher DoD 8570/8140 certification
Experience supporting customer mission systems.
Experience supporting GEOINT applications.
Experience with:
VMware vCenter
Git
ServiceNow
Active TS/SCI clearance required
Successfully pass background and drug screening
Knowledge, Skills, and Abilities:
Ability to work independently and yet be effective within a team setting
Must be capable of managing multiple efforts with time-related constraints in a fast-paced contracting environment
Demonstrated ability to effectively communicate and collaborate with diverse internal and external stakeholder groups and individuals
Friendly presence, helpful attitude, good interpersonal skills, and ability to work well with others.
Excellent skills in Microsoft Word, Excel, and other Office applications
Proficient with Microsoft Office Applications, and experience working in a home office setting as well as the ability to train end users on frequently asked technical issues.
Ability to provide technical assistance and support over the phone; good phone skills, professional demeanor, and previous customer service experience strongly desired.
Good problem-solving skills; ability to visualize a problem/situation and think abstractly to solve it
Knowledge of RMF security controls and vulnerability remediation
Strong administration experience with:
Red Hat Enterprise Linux (RHEL)
Active Directory
Experience implementing and maintaining STIG compliance
Experience with:
Ansible
SCCM/MECM
Splunk
Elastic Stack
Red Hat Certified Systems Administrator (RHCSA)
Microsoft Certified: Windows Server Hybrid Administrator Associate
ITIL Foundation Certification
Strong troubleshooting and analytical skills
Ability to obtain CI Polygraph
Ability to work Shift hours. Shifts will be identified upon hire
Ability to work nights/weekends/holidays as required
Ability to work independently and yet be effective within a team setting
Must be capable of managing multiple efforts with time-related constraints in a fast-paced contracting environment
Demonstrated ability to effectively communicate and collaborate with diverse internal and external stakeholder groups and individuals
How you’ll grow
At Chenega MIOS, our professional development plan focuses on helping our team members at every level of their careers to identify and use their strengths to do their best work every day. From entry-level employees to senior leaders, we believe there’s always room to learn.
We offer opportunities to help sharpen skills in addition to hands-on experience in the global, fast-changing business world. From on-the-job learning experiences to formal development programs, our professionals have a variety of opportunities to continue to grow throughout their careers.
Benefits
At Chenega MIOS, we know that great people make a great organization. We value our team members and offer them a broad range of benefits.
Learn more about what working at Chenega MIOS can mean for you.
Chenega MIOS’s culture
Our positive and supportive culture encourages our team members to do their best work every day. We celebrate individuals by recognizing their uniqueness and offering them the flexibility to make daily choices that can help them be healthy, centered, confident, and aware. We offer well-being programs and continuously look for new ways to maintain a culture where we excel and lead healthy, happy lives.
Corporate citizenship
Chenega MIOS is led by a purpose to make an impact that matters. This purpose defines who we are and extends to relationships with our clients, our team members, and our communities. We believe that business has the power to inspire and transform. We focus on education, giving, skill-based volunteerism, and leadership to help drive positive social impact in our communities.
We want job seekers exploring opportunities at Chenega MIOS to feel prepared and confident. To help you with your research, we suggest you review the following links:
Chenega MIOS (Military, Intelligence, and Operations Support) brings together a family of high‑performing companies united by a common purpose: supporting the most critical missions of the federal government, the Department of Defense, and the Intelligence Community.
MIOS serves as the enterprise backbone—providing strategic direction, integration, and shared services—while our operating companies deliver hands‑on expertise where it matters most. This structure combines stability and scale with the agility our customers expect.
What sets us apart is trust: earned through performance, integrity, and long‑standing relationships—and reinforced by the exceptional people who choose to build their careers here. We are committed to creating a workplace where respected professionals can do meaningful work, grow their skills, and be part of something larger than themselves.
At Chenega MIOS, mission success starts with people.
Offices: 10505 Furnace Rd., Suite 205, Lorton, VA 22079, US
Chenega MIOS (Military, Intelligence, and Operations Support) brings together a family of high‑performing companies united by a common purpose: supporting the most critical missions of the federal government, the Department of Defense, and the Intelligence Community.
MIOS serves as the enterprise backbone—providing strategic direction, integration, and shared services—while our operating companies deliver hands‑on expertise where it matters most. This structure combines stability and scale with the agility our customers expect.
What sets us apart is trust: earned through performance, integrity, and long‑standing relationships—and reinforced by the exceptional people who choose to build their careers here. We are committed to creating a workplace where respected professionals can do meaningful work, grow their skills, and be part of something larger than themselves.
At Chenega MIOS, mission success starts with people.
Offices: 10505 Furnace Rd., Suite 205, Lorton, VA 22079, US