Sr. Systems AdministratorSt. Louis, MOWe 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 growAt 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.
